Atilla DURSUN

Article | 2021 | Atatürk Üniversitesi Ziraat Fakültesi Dergisi / Ataturk University Journal of Agricultural Faculty52 ( 2 )

Nutrient uptake of chard under well-watered and drought conditions with different NO applications were investigated in this research. NO solutions were prepared with four doses (0, 50, 100, 150 and 200 µM) of sodium nitroprusside as a nitric oxide source and exogenously applied on only seeds (s) or together with seed and foliar (sf) of chard under different levels of drought according to 100% (control), 67% and 33% of the water required to reach field capacity. Nutrient uptake drastically decreased under drought stress. However, progressive effects of NO applications on nutrient uptake have been observed under both well-watered cond . . .itions and under drought. The increase in N and P uptake of plant were significant especially for doses of 100 and 150 µM for both s and sf applications. The highest Fe, Cu and Zn content were obtained from 150 µM sf NO application, while the highest Mn and B were obtained from 150 µM s and 200 µM sf NO application in 67% level. However, in 33% level the highest Cu and B content were obtained from 150 µM sf NO application, while the highest Mn and Zn obtained from 100 µM sf and the highest Fe obtained from the 200 µM s NO application More less