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- W1983845638 abstract "Nitrogen (N) metabolism in plants requires adequate potassium (K) content in the cytoplasm. However, the influence of NH4 + in the nutrient solution on plant uptake of K is controversial. To identify the effect of N form on K uptake in sweet pepper (Capsicum annum L. cv. Hazera 1195) two hydroponic experiments containing three K concentrations (0.5, 2.5, and 5.0 mM) combined with four NH4 + −N to NO3 − −N mM ratios (0:6, 0.9:5.1, 1.8:4.2, or 3:3) at a constant total of 6 mM N were conducted during the spring-summer and autumn-winter seasons. Early fruit yield was affected by K concentration but not by N form. Replacing 0.9–1.8 mM (15–30%) of NO3 − −N by NH4 + −N increased total fruit yield, especially when only 0.5 mM K was supplied. No significant interaction of NH4 + −N and K concentration on early and total fruit yield was found in either season. The uptake rate of NH4 + −N was related to its concentration and was independent of K concentration in the culture solution. The uptake rate of K was reduced as the NH4 + −N concentration increased above 1 mM. Compared to sole NO3 − −N supply, adding 0.9–1.8 mM NH4 + −N significantly increased the plant leaf phosphorus (P) and N content, but did not affect the leaf K content in the high yielding spring-summer season. It is concluded that 0.9–1.8 mM NH4 + −N (15–30% of total N) in the nutrient solution could increase both the total fruit yield and fertilizer K use efficiency in sweet pepper." @default.
- W1983845638 created "2016-06-24" @default.
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- W1983845638 date "2002-04-02" @default.
- W1983845638 modified "2023-09-28" @default.
- W1983845638 title "AMMONIUM ON POTASSIUM INTERACTION IN SWEET PEPPER" @default.
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- W1983845638 doi "https://doi.org/10.1081/pln-120002954" @default.
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