جستجوی مقالات مرتبط با کلیدواژه « عملکرد علوفه خشک » در نشریات گروه « زراعت »

Due to the spread of droughts and fodder shortages in the country, it is necessary to introduce new cultivars of forage sorghum. Investigating the genotype-environment interaction to select the superior genotype is one of the most important steps of breeding programs. In these programs, evaluating the compatibility of different genotypes to various environmental conditions is important.

Ten promising lines of forage sorghum were studied in a randomized complete block design with three replications at seven regions of Iran (Boroujerd, Zabol, Sanandaj, Shiraz, Karaj, Gorgan, and Yazd) for two years (2018-2019). The AMMI method was used to evaluate the yield stability and compatibility of genotypes.

The results of combined analysis of variance showed that the effects of year, place, year × place, genotype, year × genotype, place × genotype, and year × place × genotype on the fresh and dry forage yield were significant (p≤0.01). The significant interaction of environment × genotype indicates different reactions of genotypes in different environments. The results of AMMI analysis showed that the six main components of the interaction of environment × genotype were significant for fresh and dry forage yields (p≤0.01). For fresh forage yield, the first main component of interaction (IPCA1) had the largest contribution (26.6%) in the expression of genotype-environment interaction and the second to seventh main components were in the next ranks of importance with 18.4, 17, 15.7, 10.5, 7.5 and 4.3%, respectively. For dry forage yield, the first main component of interaction (IPCA1) had the largest contribution (21.8%) in the expression of genotype-environment interaction and the second to seventh main components were in the next ranks of importance with 19.8, 14.7, 14, 11.1, 10.1 and 8.5%, respectively. In total, the cumulative contribution of the seven main components was 98% for fresh forage yield and 97% for dry forage yield. In terms of fresh forage yield, the KFS10, KFS12, and KFS17 lines had the lowest IPCA1 values, which are introduced as stable lines with high general compatibility. In terms of AMMI stability value (ASV) for fresh forage yield, the KFS10 line was determined as the most stable line. In terms of dry forage yield, the KFS2, KFS3, KFS9, and KFS17 lines had the lowest IPCA1 values, which are introduced as stable lines with high general compatibility. The KFS2 line had the lowest amount of ASV in terms of dry forage yield.

Overall, the KFS18 line with high fresh and dry forage yields (121.1 and 32.04 t.ha-1, respectively), low IPCA1, and also optimal forage production in most environments (according to the Biplot model of AMMI) is recognized as a superior genotype.

To study the effect of nitrogen fertilizer and irrigation regimes on some crop growth indices of forage maize under conventional and conservation tillage system, an experiment has been conducted in split plots with a randomized complete block design and three replications at University of Tehran’s farm during 2018. Tillage systems, as the main plot in two factors, include conversation and conventional tillage, whereas water stress, being the subplot, is in three levels which are 30%, 60%, and 90% of moisture requirement. Also, nitrogen fertilizer, as the sub-sub plot, is at three levels, 0, 50%, and 100% of the recommended rate. Results in the flowering stage show that the highest leaf area index (6.28) and crop growth rate (34.01 gr m-2 day-1) have been obtained from the interaction between slight water stress (90% of crop water demand) and nitrogen (100% of crop demand) as well as the interaction between slightly water stress and 100% nitrogen in conventional tillage, respectively. The highest relative growth rate (0.08 gr gr-1 day-1) and total dry matter (1006.86 gr m-2) belong to simple impact of 100% nitrogen along with the interaction of slightly water stress and 100% nitrogen in conventional tillage, respectively. Results show that under severe water stress and higher application of nitrogen, the fertilizer will cause less crop dry matter under conventional tillage.

To evaluate the interaction pattern of genotype × environment and grain and dry forage yield stability of 10 promising dual purpose sorghum lines, a field experiment was carried out using randomized complete block design with four replications in six field stations of Karaj, Mashhad, Birjand, Zabol, Moghan and Isfahan in 2014 and 2015 growing seasons. Combined analysis of variance showed that the main effects of year, location, and genotypes as well as their interaction effects were significant (p <0.01) on grain yield, dry forage yield and biological yield. Mean comparison showed that line No. 3 (KDFGS9) with grain yield of 7.8 tha-1 had the highest grain yield, and line No. 1 (KDFGS4) and line number 9 (KDFGS26) with 26.2 and 26.1 tha-1 had the highest dry forage yield, respectively. Line No. 1 (KDFGS4), No. 2 (KDFGS6) and No. 9 (KDFGS26) were superior to the others by producing of 34.3, 33 and 32.5 tha-1 of biological yield, respectively. Analysis of variance by AMMI model and fitting of main components to the genotype by environment interaction effect showed that two main components for grain yield, dry forage yield and biological yield were significant. The first two components explained 67.8 percent of the sum of the squares of the interaction. According to the AMMI model and ASV stability parameter, lines No. 2 (KDFGS6) and No. 3) KDFGS9( with high grain and dry forage yield stability were the most suitable lines for dual purpose with the priority of grain production. On the other hand, lines No. 9 (KDFGS26) and No. 1 (KDFGS4) can be released as dual-purpose cultivars with the priority of forage production.

To evaluate the response of 45 sorghum lines and cultivars to salinity stress, two experiments were conducted in non-stress (EC=2 dS.m-1) and salinity stress conditions (EC=12 dS.m-1) using randomized complete block design with three replications. The experiments were carried out at Ardakan research station of Agricultural and Natural Resources Research Center of Yazd, Iran, in 2014. Salinity stress significantly decreased all measured traits in lines and genotypes. Under salinity stress conditions, stem diameter, stem height, leaf number, leaf area index, fresh forage yield and dry forage yield were decreased 14.45%, 25.24%, 18.06%, 31.86%, 40.19% and 32.36%, respectively. The highest dry forage yield under non-stress and salinity stress conditions was produced by KDFGS23 (28530 kg.ha-1) and Jumbo cultivar (21042 kg.ha-1), respectively. Results of correlation coefficients among dry forage yield under non-stress and stress conditions and tolerance indices showed that GMP, HAM, MP and STI indices were the most suitable tolerance indices. Results of cluster analysis showed that Jumbo, Pegah, Sistan, Sweet sorghum, Ghalami Herat and Speedfeed (Moghan) had higher tolerance to salinity stress, while lines KDFGS23 and KDFGS26 and Nectar cultivar had greater sensitivity to salinity stress. Since line No. 1 (KDFGS1) had greater yield stability, it worth further explorations in future breeding projects.

In order to determinate the optimum combination of barley with fenugreek in intercropping under cow manure levels, an experiment was conducted as split plot based on a randomized complete blocks design with three replications at the research farm of Ramin Agriculture and Natural Resources University of Khouzestan during growing season of 2014-15. In this study, four manure levels (0, 12, 24 and 36 t.ha-1) were placed in the main plots, and eight levels of replacing and increasing ratios of intercropped cultures including 75% barley 25% fenugreek, 50% barley 50% fenugreek, 25% barley 75% fenugreek, 100% barley 16.6% fenugreek, 100% barley 33.3% fenugreek, 100% barley 50% fenugreek and pure cultures of both plant were placed in sub-plots. The results showed that the highest barley dry forage yield (2850 kg.h-1) was obtained from treatment of Sole barley by application of 36 ton.ha-1 manure, also the highest fenugreek dry forage yield (1633.33 kg.h-1) was obtained from treatment of Sole fenugreek by application of 24 ton.ha-1 manure. According to the highest System Productivity Index (SPI = 2933.29) from two treatment of 100% barley 50% fenugreek and 100% barley 33.3% fenugreek by application 36 ton.ha-1 manure, An increase of culture at 36 ton.ha-1 of manure was the best composition in the present experiment. Also the Land equivalent ratio and aggressivity index was obtained in increasing ratios of intercropped cultures and with application of 36 ton.ha-1 manure more than one. Therefore, in this study, barley and fenugreek were introduced two species compatible combinations of intercropping.

IntroductionThe plant hormones such as salicylic acid and gibberellin can affect the quantity and quality of crops. External application of plant growth regulators as a strategy for improving salt tolerance in plants is discussed. Foreign Salicylic acid can regulate antioxidant enzyme activity and increase plant resistance to abiotic stresses. Salicylic acid reduction due to ethylene through the effect on the mechanisms of enzymatic and non-enzymatic of plant improves oxidative stress protection. Gibberellic acid increased amylase activity in the cotyledons of mung bean seedlings. Gibberellin are for the elongation of cells in the embryo and endosperm during seed germination.
Materials and MethodsIn order to evaluate the effect of salicylic acid and gibberellin on yield and yield components of mung bean, an experiment was conducted using factorial experiment in the form of RCBD with three replications at Research Farm of Agro-Industry Center of Goharkooh Khash (Iran) in 2014. In this experiment salicylic acid was used at four different concentrations including A1 (0 ppm [control]), A2 (25 ppm), A3 (50 ppm) and A4 (100 ppm) as first factor and gibberellin in three different concentrations B1 (0 ppm [control]), B2 (50 ppm) and B3 (100 ppm) as second factor. Agricultural traits including plant height, forage yield, dry matter yield, grain yield, 1000 seed weight and harvest index.
Results and DiscussionsThe results showed that in the treatment of 50 ppm of salicylic acid the highest dry matter yield was obtained by 1837 kg per hectare and 49% increase compared to the control, 513.3 kg per hectare grain yield by 36.19% increase compared to control, and harvest index also amounted to 27.11 percent compared to the control was 30/76%. In the treatment of 100 ppm gibberellin best dry matter yield by 1469.36 kg per hectare and 20.9% increase compared with the control, grain yield by 508.08 kg per hectare yield and 31.09% increase compared to control, and harvest index by 25.66 percent and 20.45% compared to control increased, respectively. It seems that salicylic acid and gibberellin increased cell division in the meristem plantlets and thus improved the plant growth. Salicylic acid and gibberellin through proper inflammatory cells, increase division, elongation and cell differentiation, the allocation of the substances synthesized for growth and prolong the period of growth may rise to normal cells, and thus increase the plant height. The comparison shows that primed seeds to create favorable conditions by increasing plant height, relative water content, proline content and soluble sugar content reduction was significantly increased plant biomass and grain yield. Vetch dry matter accumulation yield, plant height and yield of forage plants can be attributed to a high levelof dry matter accumulation in different parts of the plant. Concentrations of salicylic acid and gibberellin treatments, have increasd plant height and ultimately produced a better performance. The use of these plant hormones can increase the rate of photosynthesis and the transfer of materials to the seeds. Reserves accumulated in the stem before pollination can also in some plants be used for grain filling, in addition to the present assimilate used, resulting in an increase in harvest index contributed. Foreign Salicylic acid can regulate antioxidant enzyme activity and increase plant resistance to abiotic stresses. Salicylic acid reduction due to ethylene through the effect on the mechanisms of enzymatic and non-enzymatic of plant improves oxidative stress protection. Gibberellic acid increased amylase activity in the cotyledons of mung bean seedlings. Gibberellin are for the elongation of cells in the embryo and endosperm during seed germination.
ConclusionThe results showed that in the treatment of 50 ppm of salicylic acid the highest dry matter yield was obtained by 1837 kg per hectare and 49% increase compared to the control, 513.3 kg per hectare grain yield by 36.19% increase compared to control, and harvest index also amounted to 27.11% compared to the control was 30/76%. In the treatment of 100 ppm gibberellin best dry matter yield by 1469.36 kg per hectare and 20.9% increase compared with the control, grain yield by 508.08 kg per hectare yield and 31.09% increase compared to control, and harvest index by 25.66 percent and 20.45% compared to control increased, respectively. In general it can be stated that salicylic acid and gibberellin have positive and significant impact on traits, and vetch plants grow better with treatment of 50 ppm of salicylic acid and 100 ppm of gibberellin.

In order to investigate the effect of different levels of biofertilizer inoculation and phosphorus chemical fertilizer on mineral elements absorption in forage corn SC. 540 under humidity regimes، an experiment was conducted as Line source based on a randomized completele block design with three replications during two growing seasons of 2012 and 2013. The implementation of Line source was applied four levels of irrigation (not stress، mild stress، moderate stress، severe stress). Five phosphorus levels included the application of 100 percent triple super phosphate fertilizer and without biofertilizer، 75 percent recommended chemical fertilizer with biofertilizer، 50 percent recommended chemical fertilizer with biofertilizer، 25 percent recommended chemical fertilizer with biofertilizer، biofertilizer and without chemical fertilizer، too. The results of experiment showed significant differences of fertilizer treatment in most of studied traits in the first and second of year. The highest of fresh and dry forage yield obtained to apply treatment of 100 percent triple super phosphate fertilizer and without biofertilizer that this value wasn’t statistically significant difference with 75 percent recommended chemical fertilizer and biofertilizer. The mineral elements absorption decreased with increasing of stress condition. The highest amount of absorption of phosphors recorded in 75 percent recommended chemical fertilizer with biofertilizer، although in stress condition، the highest amount of absorption of phosphor recorded in 50 percent recommended chemical fertilizer with biofertilizer.

To study the effect of plant density and harvest time on forage yield of Chicory (Cichorium intybus L. cv. Grasslands Puna)، an experiment was conducted at Research Farm of Ferdowsi University of Mashhad، Iran، over two years in 2006 and 2007. Experimental design was split-split plot based on complete randomized block design with three replications. Different plant densities of ‘Grasslands Puna’ chicory (Cichorium intybus L. cv. Grasslands Puna) (10، 20 and 40 plants. m-2)، three harvest time (10% flowering، 50-60% flowering and full flowering) and three cutting frequency (due to plant re-growth) allocated to main، sub and sub-sub plots، respectively. Results showed that10% flowering and full flowering stages of ‘Grasslands Puna’ chicory were achieved at 113 and 140 days after sowing، respectively (2160 and 2729 growing degree-days). Total fresh forage، dry forage and leaf yields of ‘Grasslands Puna’ chicory were significantly increased (more than 59، 29 and 28%، respectively) by increasing the plant density (from 10 to 40 plant. m-2). The lowest dry leaf yield (452. 2 kg. ha-1) and leaf to biomass ratio (355. 4 g. kg-1) were observed in the third harvest (full flowering stage). In general، planting density of 40 plants. m-2 and harvesting in of 50 % flowering stage produced a satisfactory forage yield in ‘Grasslands Puna’ chicory in climatic condition of the experiment site.

This research was conducted to evaluate the effect of mild and intense drought stresses on root traits and some anti-oxidative enzymes and to identify drought tolerant genotypes in tall fescue. Twenty-four genotypes were assessed under three levels of moisture regime (control, mild and intense drought stresses) according to a factorial experiment based on a completely randomized design with three replications. The genotypes were clonally propagated and planted in PVC tubes (60×16 cm). Results indicated that the effect of moisture regime, genotype and their interaction were significant for all of the measured traits. Under mild and intense drought stress, the root length, root dry weight and dry forage yield decreased compared with control. Intense drought stress increased the root/shoot ratio about 25 percent. The activities of catalase and ascorbate peroxidase decreased under intense drought stress compared with control and mild drought stress, while the activity of peroxidase increased in this level of stress. Results showed that some tall fescue genotypes under drought stress had high yield productivity, desirable root and anti-oxidative systems indicating that these genotypes had drought avoidance and drought tolerance mechanisms which can be used for future breeding programs.

To study the effect of plant density on morphological traits, dry fodder yield and yield components of four forage sorghum cultivars in second cropping, an experiment was conducted at experimental farm of Islamic Azad University of Damghan in 2012-13. A factorial randomized complete block design with three replications were used. The treatments were three plant density (88, 133 and 266 thousand plant per hectare) and four forage sorghum cultivars [Speed feed (early maturity), Sugergraze (medium maturity), Nectar (mid-late maturity) and Jambo (late maturity)]. The results showed that the effect of plant density on number of leaf per plant, leaf area index, number of tiller per plant, stem diameter, leaf, stem and panicle dry weight /per plant and/per m2, and dry fodder yield were significant. Dry fodder yeild was increased by 41.14 percent with increasing of plant density from 88 to 266 thousand plant per hectare. The result of this study showd that Sugergraze cultivar with plant density of 266 thousand plants per hectare is appropraite as second cropping in damghan region.

This research explored the priming effect on dry matter yield and two hybrid maize qualitative characteristics (S.C.640 and S.C.704). This Study was carried out with a factorial experiment in randomized completely block design with four replications in 2010- 2011 in Agricultural and Natural Resources Research Center Qaemshahr (Qarakheil). Treatments involved two type corn seeds (S.C.640 and S.C.704) and seven priming solutions which contain polyethilen glycol (PEG) with 5 and 10 percent densities, potassium nitrat (KNO3) with 0.5 and 1 percent densities, chloride potassium with 1 and 2 percent densities, hydro priming (soaking in water) and control (with out priming). Results showed that the maximum dry matter yield in hectar was obtained by priming with polyethilen glycol solution by 5 and 10 percent densities which respectively equals 9556 and 8979 kg/ha. The Maximum dry weight of stem to whole and the range of dry weight in ear to stem and leaf were respectively achieved by priming with polyethilen glycol solution in 5 and 10 percent densities. Also, the maximum rate of fiber, protein, sugar and ash was jointly obtained by polyethilen glycol priming with 10 percent densities which respectively equal 33.40, 15.26, 26.03 and 7.02 percent and the minimum rate of protein and ash was achieved by polyethilen glycol priming with 5 percent (7.21 and 4.41 percent). The maximum rate of protein, sugar and ash were under the influence of interaction varieties × priming with polyethilen glycol by 10 percent under (S.C.640) percent densities which respectively equal 32, 25.83 and 7.73 percent achieved. Among the seeds tested, S.C.640 represented the best seeds under simulated drought conditions. We can claim that these seeds are suitable for drought situations with other growth stages tested in field experiments.

To investigate the effect of different amounts of Fe and Mn on qualitative and quantitative traits of forage maize (Zea mays L.) hybrid single cross 704، an experiment was conducted as a factorial in a randomized complete block design with 16 treatments and three replications at Qaneat city (Southern Khorasan Province) in 2010. Treatments consisted of 4 levels of FeSO4 (no fertilizer as control and 30، 60 and 90 kg/ha) and 4 levels of MnSO4 (no fertilizer as control and 10، 20 and 40 kg/ha). With increase of Fe and Mn fertilizers، a significant increase was occurred in plant height، leaf number، stem diameter، dry weight (stem، leaf، maize) and dry forage yield. Increased rates to optimum level (Fe-60 and Mn-20 kg/ha fertilizers according to the soil test)، increased the yield، but more fertilizer reduced the quality. Therefore for forage with good quality and quantity، 60 and 20 kg/ha of Fe and Mn fertilizers، respectively is recommended for this area.

In order to evaluate the effect of water stress and nitrogen levels on yield and morpho-physiological traits of two forage sorghum cultivars, a field experiment was conducted at the College of Agriculture, Shiraz University, during spring and summer 2011. The experiment was carried out as a split-split plot design based on RCBD with 3 replications. 100, 75 and 50% FC were considered as main plots, whereas nitrogen levels (150, 300 and 450 kg urea.ha-1) and forage cultivars (Pegah and KFS2) were considered as sub- and sub-sub plots. Results showed that water stress significantly reduced crop growth rate (CGR) and leaf area index (LAI) over the growing season, while decreased forage dry weight and yield at harvest time. Nitrogen fertilizer application significantly enhanced the above traits. Two sorghum cultivars showed significant differences in terms of morphological characters and some measured traits. So that Pegah cultivar was found superior as far as CGR, forage dry weight and forage yield were concerned, while, KFS2 cultivar showed higher LAI. Results also indicated that increasing soil moisture and nitrogen levels can have considerable effect on forage yield improvement. In general, Pegah cultivar and the interaction of 300 kg urea per ha. and 100% FC, achieved the greatest forage yield and could be recommended as the best treatment for similar agro-climatic conditions.

Efficient use of natural and biological cycles such as nitrogen fixation by legumes may stimulate yield of non-legumes crops in an intercropped system. In order to evaluate spring barley (H) and annual alfalfa (M) intercropping, a study was conducted in the research field of University of Tehran (located in karaj) during 2009-2010 growing season. In this research, a randomized complete block design with 4 replications and 14 treatments were used. Treatments include: H1:1M, H2:2M, H4:4M, H6:6M, H6:2M, H4:2M, H2:4M, H2:6M, H100%:20%M, H100%:40%M, H40%:100%M, H20%:100%M and two additional treatments of barley and alfalfa sole intercropping were established. The highest cumulative dry forage yield was achieved from treatment H1:1M (2934 Kg/ha). The maximum forage crude protein (CPf=30.87%), dry matter digestibility (DMDf=76.57%) and silage crude protein (CPs=17.88%) was detected in sole culture of alfalfa. Also, the highest silage dry matter digestibility (DMDs=31.37%) and silage ash (18.73%) belong to H4:2M, H6:2M, respectively. The highest land equivalent ratio (LER=1.232), and relative crowding coefficient (RCC=2.60) was detected for H1:1M mixture. Our results suggested that the best mixture is H1:1M for quantity yield. For achieving better quality, more percentage of alfalfa in mixtures is necessary.

To study the effect of harvest in different growth stages on quantity and quality of forage of amaranth varieties a field experiment was carried-out as factorial arrangement in randomized complete block design with three replication in two successive growing seasons (2006 and 2007) in Karaj، Iran. Experimental factors included: four amaranth varieties; Ultra، Kharkof، Kharkofsky and Unknown، and two harvest stages; flowering and after seed set. For forage yield of amaranth varieties، samples were taken from determined area in each plot. For quality assessment of treatments، standard samples were prepared. Results showed that amaranths variaties significantly (P < 0. 01) differed for fresh and forage yields. The highest fresh (86400 kg ha-1) and dry (13320 kg ha-1) forage yields belonged to Ultra. Combined analysis of variance revealed that effects of year and interaction of variety × harvest stage were significant (P < 0. 01) on fresh and dry forage yields. Amaranth varieties significantly (P < 0. 01) differed for crude protein content which varied from 7. 75% to 22. 2%. There were highly significant negative relationship between dry matter digestibility (DMD) and acid detergent fiber (ADF) (r = -0. 874**) and organic matter digestibility (OMD) (r = -0. 911**). The estimated means of DMD، OMD and DOMD (Dry organic matter digestibility) were 71. 1%، 67. 6% and 58. 8%، respectively. Ultra harvested in flowering stage had the highest profit (12880000 IRR). The estimated marginal rate of return of substitution of this treatment with other tretments was 96%. Therefore، Ultra with harvest in flowering stage was identified as suitable treatment.

To determine potential productivity of Red clover varities, an experiment was carried out with six treatments and four replications using RCBD, under different environmental conditions in 2002–2004. Results showed that there was a significant difference (p<0.05) between Red clover varities for fresh and dry forage yield over years and locations. Karaj with 87.99 tha-1 fresh yield and 15.5 t ha-1 dry forage yield produceed the highest yield and Shahr-e-Kord with 38.14 tha-1 fresh yield and 8.76 tha-1 dry forage yield produced the lowest yield. Mean comparison of fresh and dry forage yield of Red clover varities over years and locations showed that the best adapted varieties for different locations as follows: in Karaj and Sharh-e-Kord Redquin and Kulubara; in Sanandaj and Gorgan; Redquin and Bosa, in Kermanshah and Arak Redquin, Tolidi-e-FAO and Tolidi-e-Karaj Results also showed that years and locations significantly affected on potential productivity of Red clover varities. Fresh forage yield varied between 91.8-40.2 tha-1 and dry forage yield varied between 9.02-16.42 tha-1. In all locations, forage yield of Red clover varities followed a decreasing trend from the first to the third year, forge yield potential of Red clover varities was the highest in the first year and the lowest in the third year, respectively. Kulubara was more tolerant, and Tolidi-e-FAO the most sensitive to powdery mildew, respectively. The final results showed that although in each locations there were more adapted variety, but Redquin and Kulubara are recommended as wide adapted varieties for all locations.

An experiment was conducted to evaluate the effect of different levels of nitrogen and plant density on quantitative and qualitative characteristics of silage maize (cv. SC704) in Varamin experimental field station in three consecutive growing seasons (2000-2002). The experiment was arranged in split plot, using randomizd compble block design (RCBD) with three replications. Four levels of nitrogen induding; No nitrogen fertilizer (N0), nitrogen fertilizer equal to the recommended rate based on soil test (N180), nitrogen fertilizer 30% more than recommended rate and nitrogen fertilizer 30% less than recommended rate (N230 and N130, respectively) assigned to main plots and plant density at four levels; 70 thousand plant/ha (D70), 90 thousand plants/ha (D90), 110 thousand plants/ha (D110) and 130 thousand plants/ha (D130) randomized in sub-plots. Combined analysis of variance showed that different nitrogen levels did not significantly affect total dry matter yield, stem, leaf, cobb, protein yield, diameter and plant height. Plant density significantly affected ear and leaf dry matter yield at 5% probability level, and interaction of nitrogen and plant density was significant on ear dry matter yield at 1% probability level. The highest dry matter 10.2 T/ha was produced in D130, treatment. Total dry matter 11.4, 11.3 and 10.2 T/ha, leaf dry matter yield of 2.2, 1.2 and 1.3 T/ha, cobb dry matter yield 3.3, 3.4 and 3.4 T/ha and protein yield 0.9, 0.8 and 0.7 Kg/ha were recorded in N230D110, N230D130, N180D130, respectively. Hence, it can be concluded that by increasing plant density to more than 50% of recommended and using of nitrogen fertilizer equal to the recommended rates based on soil test, can increase yield of silage maize and its quality.