جستجوی مقالات مرتبط با کلیدواژه « protein content » در نشریات گروه « آب و خاک »

In order to investigate the effect of mycorrhizal fungi symbiosis and glycine betaine foliar application on some quantitative and qualitative characteristics of rainfed wheat, this experiment was carried out in the Rainfed Research Station of Agricultural and Natural Resources Education and Research Center of West Azerbaijan, Iran during 2017-19 cropping seasons. The experiment was performed as a factorial randomized complete block design with three replications. The first factor was mycorrhizal fungi inoculum at three levels: (1) control, (2) inoculation of seeds before sowing with mycorrhizal fungus inoculum of  Rhizaphagus irregularis (GI) at a rate of 2%, (3) inoculation of seeds before sowing with mycorrhizal fungi inoculum as a mixture of three species of Funneliformis mosseae, Rhizaphagus irregularis  and Claroideoglomus etunicatum  (GM) at a rate of 2% and the second factor was glycinebetaine in two levels (1) control (water spraying) and foliar application of glycinebetaine. The results showed that root colonization was significantly affected by mycorrhizal fungal treatments and increased from 9.89% in control to 30.57% and 40.71% in GI and GM treatments, respectively. Using GM and GI inoculum, wheat grain yield increased by 269 and 187 kg ha-1, respectively. Application of mycorrhizal inoculum increased grain protein content and concentration of phosphorus (P) and zinc (Zn) in the grain. In all the mentioned traits, GM treatment had higher efficiency than GI treatment. Glycine betaine increased seed yield by 160 kg/ha. Foliar application of glycine betaine increased grain yield by 160 kg ha-1. The highest grain yield in GM treatment + glycine betaine foliar application was 2163 kg ha-1 which was 196 kg more than the control treatment. Generally, the results suggested that the application of MI inoculant + foliar application of GB were highly effective in improving the grain yield, harvest index, and quality parameters of rainfed wheat in semi-arid regions.

The total area under quinoa (Chenopodium quinoa Willd.) cultivation and its grain consumption have increased in recent years because of its nutritional properties and ability to grow under harsh environmental conditions, such as drought. The main goal of this work was to evaluate growth, crop quantitative and qualitative yield, and water use efficiency (WUE), as well as to determine the quinoa response, variety ‘Titicaca’, to different salicylic acid concentrations (SA) (0, 0.5, 1 and 2 mM) under different irrigation levels (100, 75, and 40% field capacity (FC)). The field experiment was conducted in split plots in three blocks during the 2019 growing season, in the research field of Shahid Bahonar University of Kerman, Iran. The results demonstrated that while the plants subjected to deficit irrigation displayed significant reduction in crop growth rate, biological yield, seed yield and its components, the high concentrated SA (2 mM) application led to improving the mentioned traits. Under normal irrigation conditions, moderate concentrations and under severe water deficit, high concentration of SA resulted in improved growth, WUE, and grain protein yield. The highest WUE was achieved by deficit irrigation and high SA concentrations. Water deficit increased grain protein content, while increased SA concentration reduced its content. In contrast, reduced grain protein yield was observed when water deficit occurred while SA application led to improving protein yield. In general, the results showed that considering the water resources accessibility in quinoa fields, different salicylic acid concentrations can be used to improve the water productivity and performance in arid and semi-arid regions.

In order to study the effect of various irrigation water levels and fertilizers on water use efficiency, yield and seed protein content, a two year field experiment was conducted in agricultural and natural resources research station of Broujerd. Experiment was carried out in a split split plot design in three replicate. Main plot was involved three irrigation water levels (I0=4000, I1=5000, I2=6000 m3) and three levels of fertilizer including F1=NPK+M, F2=NPK+1.3M and F3=NPK + 0.7M are allocated to sub plot. M means microelement consumption including iron, zinc, manganese, copper and boron. Sub sub plot was allocated to three wheat cultivar including Marvdasht, M -75-7, M -75-10. Two years results of studied treatments showed that highest seed yield is related to M-75-10 cultivar; highest water use efficiency is related to Marvdasht cultivar and highest protein content is related to M-75-7 cultivar.

Proper use of water resources in arid and semi-arid regions is important and vital. This study was conducted to evaluate the effect of irrigation scheduling by various methods on crop yield and water use efficiency (WUE) by wheat، and determining suitable irrigation-scheduling method for irrigation of wheat in Saeedabad، Tabriz. A field experiment was conducted with 10 irrigation treatments (I1 to I10) in randomized complete block design with 4 replications. The irrigation timing treatments comprised of two ratios of irrigation depth to evaporation from class A pan i. e. 0. 8 (I1) and 1. 0 (I2)، two soil water potentials -40 (I3) and -60 (I4) kPa، two soil water contents i. e. 40% (I5) and 60% (I6) soil available water in root zone، two canopy temperatures i. e. stress degree days equal to 10 (I7) and 12 (I8)، and irrigations at different physiological growth stages i. e. crown root initiation (CRI) + flowering (I9) and CRI + late tillering + boot + milk stages (I10). Results indicated that there was significant difference between treatments in biomass، grain yield، WUE، kernel weight، protein content and harvest index (HI). Among the treatments، I2 had the maximum biomass، grain yield and kernel weight. I9، I10 and I3 were the best treatments in WUE، seed protein content، and HI، respectively. Although the selection of the best irrigation scheduling method depends on water resources availability and existing facilities، in general، with due attention to irrigation frequencies and other consideration such as volume of applied water، grain yield، WUE، and simplicity of the method، we can recommend irrigation at –40 kPa soil water potential as a suitable method for timing of irrigation under this experimental condition.

In order to study the effect of foliar application of boron and zinc on yield and some qualitative characteristics of two rapeseed (Brassica napus L.) cultivars, a factorial experiment was carried out based on RCBD with 18 treatments and 3 replicates during 2005-2006 at Zanjan Agricultural Research Station. Factors of the experiment were: spraying of in 3 levels including Zn0 (without spraying), Zn1 (spraying with 3 g ZnSO4/L), Zn2 (spraying with 6 g ZnSO4/L) and H3BO3 spraying including B0 (without spraying), B1 (spraying with 2 g H3BO3/L), B3 (spraying with 4 g H3BO3/L) and the cultivars were V1 (SLM046) and V2 (Talayeh). Zn and B foliar applications were done in two plant phenological stages (early stemming and flowering). During the growth season common agronomic practices were followed and grain yield and concentration of oil, protein, Fe, Mn, Zn, Cu and B of rapeseed grains were measured at harvesting time. Results showed significant difference between the treatments, so maximum grain yield of 4180 kg/ha was obtained from Zn0B1 in V1 cultivar. Concomitant application of Zn and B led to increase in their concentrations in the grain that is important from rapeseed fortification view of point. Therefore, regarding to beneficial effects of B on grain yield and joint application of B and Zn on the seed quality simultaneous spraying of boric acid and Zn sulphate with 2 g /L and 3 g /L respectively in early stemming and flowering stages may be recommended for the study area and the similar regions.

Sesame is an annual self-pollinated plant with a high seed oil and protein content. It is considered as an oilseed plant for human consumption. For a breeding purpore, quantitative and qualitative characteristics of seed total protein of different sesame varieties (Oltan, Zoodras , Yekta , Hendi , Varamin , Chini , Karaj 1 , Moghan local,Nazok tak sakheh and Nazok chand shakheh) were evaluated. Protein extracts were analysed using Kejeldal and gel electrophoresis methods. Total average of 24.02% was observed for seed protein content of all varieties. Analysis of varieties revealed a significant variation at (p < 0.01) between varieties. The profile of seed storage proteins had a relative mobility from 0.20 to 0.94. The observed bands varied in intensity and scattered in three zones of the gel . All bands were monomorphic and no variation was observed between the varieties. It was concluded that this characteristic does not carry the necessary value for breeding purposes.