نهمین کنفرانس ملی و اولین کنفرانس بین المللی فیزیولوژی گیاهی

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کد مقاله 1242

عنوان Chlorosis index, chlorophyll and nutrients content of Thompson grape in response to high bicarbonate application

نویسندگان Moloud Bahrami - Shahriar Mahdavi

چکیده High bicarbonate concentrations in vineyard soil, through their effect on acidity, reduce iron absorption and consequently reduce grape yield. Therefore, it is essential to use horticultural practices to reduce iron chlorosis. The present experiment was carried out as a factorial (4 × 2) based on a completely randomized design on grapevine cultivar ‘Thompson Seedless’ hydroponically in greenhouse conditions. The first factor was four levels of dried grape pomace (0, 2.5, 5 and 10 g/kg of culture medium) and the second factor included two bicarbonate concentrations (0 and 10 mM sodium bicarbonate; SB). Based on the results, significant differences were observed between the used treatments. The highest SPAD and nitrogen, potassium, phosphorus, iron, zinc, and manganese content were observed in the leaves of vines treated with 10 grams of grape pomace without the use of SB. Also, the application of grape pomace powder led to a decrease in the leaf chlorosis index in vines under SB stress. In general, the use of grape pomace powder affected the concentration of nutrients, especially elements effective in chlorophyll structure, such as nitrogen, magnesium, and iron, while stabilizing chlorophyll, reducing chlorosis caused by iron deficiency in Thomson Seedless grape leaves.

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