نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم و مهندسی خاک- دانشکده کشاورزی- دانشگاه رازی
2 گروه علوم و مهندسی خاک، دانشکده کشاورزی،دانشگا رازی، کرمانشاه، ایران
3 گروه بیوفیزیک خاک و سیستم های محیطی- دانشگاه صنعتی مونیخ-مونیخ- آلمان
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Rhizosheath as a potential adaptive trait can adjust the effects of drought stress by maintaining moisture, and have a positive effect on the uptake of water and nutrients by the plant. The present study was conducted to compare the formation of rhizosheath in different wheat cultivars and its impact on potassium uptake by the plant under drought stress conditions. For this reason, four wheat cultivars, Mihan and Sirvan (irrigated cultivars) and Sadra and Rizhaw (rainfed cultivars) were used. First, the pots were divided into four groups of ten, each group belonging to one cultivar, and in each cultivar, two moisture levels (optimum and stress) were applied. Drought stress started in the pots after plants were established in the soil. After ten weeks, plants were harvested, and separating the rhizosheath of each pot was done. The highest ratio of the rhizosheath dry weight to the root dry weight under stress conditions was observed in Rizhaw (69.22 g/g) and the lowest value was observed in Sadra (60.46 g/g). The highest and lowest value of potassium in the plant under drought stress was obtained in Rizhaw (30.73 mg/pot) and Sirvan (28.73 mg/pot), respectively. The maximum value of available potassium in rhizosheath under drought stress was measured in Mihan (147.45 mg kg-1) and the minimum value in Rizhaw (134.07 mg kg-1). Results showed that the studied cultivars had the same and high ability to form rhizosheath under drought stress conditions. Further studies with different wheat cultivars and other agronomic and horticultural crops are recommended.
کلیدواژه‌ها [English]
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