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  • تنش خشکی

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 Perception of the genetic diversity in domesticated and wild relatives of a plant species is important for their use in breeding programs. Considering that a large part of wheat cropping fields in Iran is located in arid and semi-arid areas, and that plants adapt to environmental stresses with different strategies, such as changes in antioxidant enzymes. Therefore, it is necessary ...

SUBJECT: تنش خشکی; آسکوربات پراکسیداز; کاتالاز; سوپراکسیددیسموتاز; آنتی اکسیدان

Introduction Various studies have investigated the response of crops and pasture plants to water for non-saline waters and their reaction to salinity in full irrigation. A set of such studies can determine water-yield or salinity-yield relationships. However, quantitative research has been done to study the effects of salinity and drought stress. However, we are proposing perpendicular system ...

SUBJECT: آبیاری بارانی; تنش خشکی; شوری; نرخ جایگزینی; گندم

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

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

Introduction and goals Coriander (Coriandrum sativum L.) is an annual plant that drought stress can impact on its yield. Drought stress is one of the most common environmental stresses limit agricultural productivities. This stress effects on many metabolic pathways such as photosynthesis, water absorption and transfer, enzymes’ activity and organic material transfer and accumulation. It can a ...

SUBJECT: تنش خشکی; بای‌پلات ژنوتیپ‌ در صفت; گزینش هم‌زمان; تنش تدریجی; تنش یکباره

Introduction Hydrotime model and its coefficients are used to investigate the relationship between water potential and germination rate and percentage. The coefficients of this model puts seed quality indexes such as speed and uniformity of germination and tolerance to environmental stresses at the disposal of researchers. The reducing of water potential significantly decreased seed germinatio ...

SUBJECT: تنش خشکی; پیری; پرایمینگ; مدلسازی جوانه‏ زنی

IntroductionWater shortage is the main factor that limits growth in dry environments. Tolerant plant is able to absorb water from the soil even in conditions of limited availability so plants achieve maximum efficiency in terms of growth and productivity. Studies have shown that drought stress alone is the reason for 50 percent reduction in chickpea yield. In Iran, this problem is more serious ...

SUBJECT: تنش خشکی; خصوصیات رشدی; کودهای آلی; عناصر مغذی

Introduction Drought stress is the main factor which limits crops production across the world. Selection of crops that are adapted to the climate of each region, the selection of suitable and resistant to environmental stresses, and the use of high-yielding farming practices play an important role in increasing the efficiency of rare source of irrigation water. Morphological and physiological ...

SUBJECT: تنش خشکی; خورجین; عملکرد بیولوژیک; تاریخ کاشت

Release of drought tolerant cultivars along with advance agronomic practices are effective ways to manage drought and water deficit in agriculture. In order to evaluate drought stress on 20 Iranian native and improved rice genotypes and determination of proper drought tolerance indicators in rice, an experiment was conducted based on factorial randomized complete block design with three replic ...

SUBJECT: تنش خشکی; شاخص های تحمل و حساسیت; برنج; عملکرد