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  • عملکرد

Introduction  Iran with mean annual precipitation of 240 mm is categorized in arid zones of the world. High evapotranspiration, limited water resources and other parameters invokes the interests for studying the effect of water stress in field crops. Also, N fertilization and plant density were important factors for growth and production of field crops. Management of balanced and efficient use ...

SUBJECT: اوره; منداب; تراکم; عملکرد; خشکی

Introduction The reduction of nutrients in agricultural soils is led to the intensive use of fertilizers because of low nutrients use efficiency of production systems (Taheri Oshtrinani and Fathi, 2016). An optimal level of nitrogen in the soil is requried to ensure vegetative growth, greater leaf area and proper yield with the minimum environmental consequences (Zabet et al. 2014; Bahamin, 20 ...

SUBJECT: سودموناس; پروتئین; ازتوباکتر; تلقیح; عملکرد

Soybean is an annual self-fertilized crop, belonging to leguminous family and glycine genus, with 40 chromosomes. Soybean is the most important oil crop worldwide since the composition of oil and protein which plays a significant role in public health. Soybean seeds have an average of 40 percent protein and 20 percent oil. Iran import more than 90% of edible oil annually. With 50 hectares of l ...

SUBJECT: پروتئین دانه; تنش خشکی; محتوای روغن; سویا; عملکرد

Introduction Cumin of the apiaceae family is a annual plant with thin and aromatic branches that height is variable between 15 -50 cm that depending on the environmental conditions (Kaffi et al., 2002). Drought stress as a factor in reducing plant growth in many regions of the world is that seriously limit crop production and climate changes in the world, the situation is more serious (Anjum e ...

SUBJECT: پرولین; تشتک تبخیر; کلروفیل a; رنگیزه فتوسنتزی; عملکرد دانه

Introduction Drought stress and water availability restrictions have always been the most important issue in agriculture in the world and Iran, and this is the most important factor in reducing plant production and Determination and identification of effective factors on wheat seed yield under water deficient condition is very important. Iran with were an average rainfall of 240 mm per year is ...

SUBJECT: بای‌پلات; همبستگی; عملکرد; تجزیه خوشه‌ای; خشکی

IntroductionUndr the condition of simoultaniousley irrigation of some crops, there is a shortage of water for irrigation. In this conditions, scheduling of the irrigation is crucial. In irrigation programs, evaporation pan is widley used. There are some reports for the effet of deficit irrigation on grain yield of sesame, where drought stress reduced growth and grain yield of sesame from 1212 ...

SUBJECT: تنش خشکی; کمپوست; کود دامی; عملکرد; شاخص برداشت

IntroductionPlants are affected by many unfavorable environmental factors and therefore crop growth and development is retarded. Cold and water stress impose a considerable damage to the economy and country’s agricultural production every year. Salicylic acid is of phenolic compounds which is found in many plants, and considered as quasi hormonal substance that plays an important role in the g ...

SUBJECT: کارایی مصرف آب; نیاز آبی; بهره وری آب; شاخص برداشت; عملکرد بیولوژیک

Introduction Heat stress caused by climate change will become a restriction for maize production in the future (Cairns et al., 2013). Damage of heat stress is very strong when is occurred in a critical stages of plant growth (particularly in the flowering phase) (Teixeira et al., 2013). Non-coincidentally of flowering stage with high temperature can be reduced the negative effects of heat stre ...

SUBJECT: تغییر اقلیم; تعداد دانه; عملکرد دانه; agmip; تاریخ کاشت

IntroductionRice is the main source of calories in more than one-third of the world's population, increasing by 30 to 35 percent by 2050, according to demand, Iran supplies 50 percent of imports of rice, the import figure in 1993 was about 185 million tons worth one billion and four hundred and ten million dollars (Jedari, 2017). Drought is the most important limiting factor in rice production ...

SUBJECT: طول دوره رشد; دور آبیاری; عملکرد دانه; برنج; شاخص برداشت

Introduction Drought stress is a major factor that reduces growth, development and production of plants especially in generative phase. Among crop plants, wheat (Triticum aestivum), which often experiences water-shortage conditions, is an appealing study system because there are so many natural genotypes differing in drought tolerance. Wheat as well as the most cereals is especially threatened ...

SUBJECT: رقم حساس به تنش خشکی; کلروفیل فلورسانس; عملکرد دانه; تبادلات گازی; رقم متحمل به تنش خشکی