ABSTRACT This preliminary study aimed to investigate the mitigation effect of silicon (Si) on field dodder‐induced stress in sugar beet. The experiment was conducted as a completely randomized design with three factors, including parasitic infection (non‐parasitized and dodder‐parasitized beet), Si source (5 mM form Na 2 SiO 3 or K ), application method (control, seed pretreatment, irrigation, foliar spraying). Without Si, dodder caused 44.9% reduction shoot biomass 57.5% root biomass....

Soil salinity is a major environmental factor limiting the productivity of agricultural lands. To determine effects irrigation water and leaching on soil consequently wheat yield, field experiment was conducted silty clay soil, typical Rudasht region, Isfahan province, Iran, with three levels 2, 8, 12dS∕m with/without 4, 19, 32% two different managements, using factorial design four replications for each treatment. The results showed that as increases, yield components such grain straw...

Response surface methodology (RSM) is defined as a collection of mathematical and statistical methods that are used to optimize product or process. In order determinate optimum levels nitrogen (N), water volume plant density onion (Allium cepa L.), field experiment was carried out according central composite design RSM in Azarshahr County, East Azerbaijan Province, Iran –repeated over two years (2011 2012). The treatments were designed based on low high N, irrigation independent...

Due to lack of suitable water resources, many farmers in Iran are using saline river or groundwater for irrigation, which causes gradual accumulation salts the soil.For sustainable agricultural productions, appropriate irrigation management practices should be applied if is used irrigation.The soil-water-atmosphere-plant model a physical-based that can simulate crop yield and soil salinity, among others.To collect fi eld data apply this as input calibrate it, experiment planted with wheat...

Soil salinity is a major environmental factor limiting the productivity of agricultural lands.To determine effects irrigation water and leaching on soil ion concentrations, field experiment was conducted siltyclay (a typical Rudasht region, Isfahan province, Iran).The consisted three levels (2, 8, 12 dS/m) with/without 4, 19, 32% under two management scenarios.Using factorial design, four replications for each treatment were used.The results showed that as increased, EC (Electrical...

Identification and determination of ecological requirements in medicinal plants is necessary for maintaining them their habitats. The aim this study was to assess the effect soil properties climatic factors various habitats on morphology, phenology, growth characteristics essential oil quantity quality Perovskia abrotanoides Karel Iran. Six most important P. were identified Khorasan province Multiple regression stepwise technique used determinate relationship between parameters (climate...

In order to determine of ruminal nutrient degradability some feeds (wheat straw, alfalfa hay, barley grain, concentrates) and total mixed rations, about 3 g DM equivalent samples were weighed in sealed nylon bags (6-cm × 7.5-cm) that incubated the rumen three ruminally fistulated buffalo steers (BW= 389.6 ± 7.5 kg) fed corn silage concentrates at maintenance level a ratio 65: 35 (DM basis) according following periods 0, 3, 6, 12, 18, 24, 36, 48, 72 96 h. Using Cr-mordanated NDF as single...

Abstract One field of study in microfluidics is the control, trapping, and separation microparticles suspended fluid. Some its applications are related to cell handling, virus detection, so on. new methods this using ICEK phenomena dielectrophoresis forces. In present study, considering phenomena, inside fluid deviated desired ratio a novel microchip. The deviation such that after reach floating electrode, they trapped flow vortex through secondary channel was placed crosswise noncoplanar...

In a compeletely randomized experiment, with factorial arrangment, the effects of three levels urea and four sulfur were tested on in vitro digestibilty fermentability rouphage based ration, incubated rumen liqure buffalo. Results showed that digestibility not affected by urea, sulfur, or interaction these factores. There was no variation among treatments up to 12h incubation for cummulative gas production, but it reduced when surful level increased from 0.37 0.41 0.45 percent diet....

Iran is located in an arid and semi-arid region of the world with average annual precipitation about 250 mm.Due to lack suitable water resources, many farmers are using saline river or groundwater for irrigation which causes gradual accumulation salts soil.Salinity soil resources one major environmental factors limiting productivity agricultural lands reduces land area under cultivation.For sustainable productions, appropriate management practices should be applied if used irrigation.The...

Climate change and technology development can affect crop productivity in future conditions. Precise estimation of crops yield as affected by climate the is an effective approach for management strategies. The aim this study was to estimate impacts change, improvement, CO2 enrichment, overall on wheat under Wheat projected three time periods (2020, 2050 2080) compared baseline year (2011) two scenarios IPCC Special Report Emission Scenarios (SRES) including SRES-A2 regional economic scenario...

Evaluation of yield potential and resistance to rhizoctonia (Rhizoctonia solani) disease new sugar beet (Beta vulgaris L.) hybrids

There is conflict regarding the relative abilities of Bos indicus and taurus cattle to digest feedstuffs. Part this may have arisen because a wide variety diets been fed at different range intakes only digestibility in whole tract measured. Generally no attempts made partition rumen post-rumen digestion or assess importance clearance between genotypes. Nitrogen (N) frequently major limiting nutrient for ruminants specially when they are given mature herbage. On other hand extent which able...

هدف از انجام تحقیق حاضر، بهینه‌سازی منابع کود نیتروژن و آب در چغندرقند (Beta vulgaris L.) شرایط آب‌وهوایی همدان با استفاده روش سطح- پاسخ بود. برای این منظور، داده‌های مورد نیاز موجود استخراج قالب طرح مرکب مرکزی گرفت. سطوح بالا پایین آبیاری به‌ترتیب 0 240 کیلوگرم خالص هکتار 8000 14000 متر‌مکعب بودند. نتایج ارزیابی مدل بر اساس شاخص­های آماری نشان داد که دقت قابل قبول معنی‌داری شبیه‌سازی صفات برخوردار بود، به‌طوری‌که مقدار شاخص RMSE تمام کمتر هشت درصد به‌دست آمد. دو هم‌پوشانی لایه‌ها حل عددی...