جستجوی مقالات مرتبط با کلیدواژه "tiller number" در نشریات گروه "زراعت"

To determine the effects of plant density on quantitative and qualitative yield of five forage sorghum hybrids, an experiment was conducted at Agricultural Research Station of Anbarloum in 2010 and 2011. The experiment was in factorial based on RCBD with four replications. The first factor was five hybrids of forage sorghum and the second factor was plant density with three levels (167000, 208000 and 278000 plantha-1). The results of analysis of variance showed that the effects of plant density and hybrids were significant on all of assesse traits. Mean comparison of the traits showed that with decrease in plant density, number of tillers per plant and stem diameter were increased. The highest number of tiller plant (3 tillerplant-1) was obtained from 167000 plant per hectare. In all hybrids, with increase in plant density, dry forage and protein yield were increased and the highest dry forage yield and protein yield were obtained from Speed Feed and ICRISAT 625 × R165 hybrids. Speed Feed produced the highest dry forage (18.5tha-1) and protein yield (132.5 kgha-1) in treatment with 287000 plant per hectare. Based on the results of this experiment, Speed Feed and ICRISAT625×R165 hybrids with 208000 plantha-1 dencity can be recommended for sowing in this region.

In this study 34 forage sorghum pure line varieties which improved in sorghum breeding program in Iran, were conducted to determine of the most suitable variety, on a randomized complete block design (RCBD) in three replications at Karaj, in 2005. Ammonium phosphate on the base of P2O5 was applied at 115 Kg/ha. and total nitrogen was used 183 Kg/ha. at four times. Four traits including green fodder, dry matter, plant height and tiller number were measured in each cutting. Harvesting was conducted from 8.4 m2 area. Data were analyzed in split plot on time based on RCBD and the means comparised with Duncan multi rang test (DMRT) method, analysis of variance showed significant differences between cuttings, varieties and cutting * variety interaction at 1% of probability. Comparison of the means by DMRT showed that KFS3 and KFS6 were produced the highest and lowest green fodder with 179.56 and 83.54 t/ha. respectively. In aspect of dry matter KFS18 and KFS6 were produced the highest and lowest dry matter with 39.84 and 20.02 t/ha. Respectively. The 84/1384 produced the highest plant height, 271.7 cm and KFS14 the lowest plant height, 129.7 cm at second cutting. 144/1384 was produced the highest tiller number per plant with 6.33 tiller at second cutting and KFS14 was produced the lowest tiller number with 1.00 tiller at first cutting. According to all traits especially main traits to forage production, totally 15 varieties were chosen for investigation of regional adaptation of new forage sorghum varieties at different conditions.

In this study eight forage sorghum cultivars KFS1, KFS2, KFS3, Pacific BMR, Chopper, Nectar, Sweet Jumbo and Speed feed were evaluated on a randomized complete block design in four replications at Karaj during 2003-2004 growing season to determine the most suitable cultivar with the highest forage yield. Ammonium phosphate on the base of P2O5 was applied at 115 Kgha-1 and a total amount of nitrogen 183 Kgha-1 at four times, was used. Six traits including green fodder, dry matter, protein yield, plant height, stem diameter and tiller number were measured in each cutting. Harvesting was conducted from 7.8 m2 area. Two years data were analysed in simple and combined analysis, and the means were compared with Duncan's multipl range test (DMRT) method. Analysis of variance showed significant differences between cuttings for all traits (except for plant height) in each year. The green fodder, dry matter, protein yield and tiller number at second cut and stem diameter at first cut ranked first in each year. Combined analysis of variance showed significant differences between years (except for dry matter and tiller number), cultivars and year cultivar interaction (except for stem diameter). The means comparison with DMRT showed, green fodder with 150.5 tha-1, protein yield with 2.80 tha-1 in the first year, plant height with 196.9 cm and stem diameter 15.48 mm in the second year ranked in first group. Nectar and KFS2 produced the highest and lowest green fodder with 164.6 and 130.4 tha-1, respectively. Sweet jumbo produced the highest dry matter (36.38 tha-1), protein yield (2.88 tha-1) and tiller number (3.61 tillers). The highest plant hieght with 214.4 cm and stem diameter with 17.99 mm were produced by Speed feed and KFS2 respectively. The lowest dry matter (32.41 tha-1), protein yield (2.58 tha-1), plant height (172.2 cm) and tiller number (2.11 tillers) were produced by chopper and the lowest stem diameter (11.61 mm) by Speed feed. Nectar and Sweet Jumbo cultivars were determined as the most suitable cultivars for forage production in this study.