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首页> 外文期刊>Journal of Potassium Research >Fertilizer Use Efficiencies of Hybrid Rice as Influenced by Application of Nitrogen and Potassium
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Fertilizer Use Efficiencies of Hybrid Rice as Influenced by Application of Nitrogen and Potassium

机译：氮，钾肥施用对杂交水稻肥料利用效率的影响

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A field experiment was conducted during kharif season of the crop year 1998 and 1999 in fields having sandy clay loam texture with pH 8.0;0.51 and 0.55% organic carbon;187 and 170 kg ha~(-1) available K,respectively.The treatments were laid out in split plot design with three replications.Two levels of nitrogen-100 and 200 kg N ha~(-1)constitute main plots and two levels of potassium -75 and 150 kg K_2O ha~(-1)applied full dose at transplating (TP),1/2 at TP+1/2 at maximum tillering (MT)and 1/3 at TP+1/3 at MT+1/3 at panicle emergence (PE)were the sub-plots.One absolute control was kept withg main plot as well as in sub-plot treatments.Using quadratic response function,economic optimum dose as well as in sub-plot treatments.Using quadratic response functin,economic optimum dose of N for hybrid rice was calculated as 165.5 kg ha~(-1).The application of N significantly increased agronomic and physioogical K use efficiency.Application of 75 kg K_2O ha~(-1)enhanced agronomic K use efficiency significantly over level of 150 kg K_2O ha~(-1).
机译：在1998和1999作物年度的卡里夫季节进行了田间试验，该田地的沙质壤土质地分别为pH 8.0; 0.51和0.55％有机碳; 187和170 kg ha〜（-1），可用K.采用三份重复的样地设计。两份氮水平分别为100和200 kg N ha〜（-1）构成主样，两份钾水平分别为-75和150 kg K_2O ha〜（-1）全剂量亚平移图是在地上移（TP）处，在最大分（（MT）处为TP + 1/2处，在穗出苗处（PE）处的TP + 1/3处处的TP + 1/3处的1/3为亚图。在主区和子区处理中均保持绝对控制。使用二次响应函数，经济最优剂量以及在子区处理中。使用二次响应函数，杂交水稻氮素的经济最优剂量计算为165.5氮肥的施用显着提高了农艺和生理钾素的利用效率.75 kg K_2O ha〜（-1）的施用提高了农艺钾素的利用效率cy大大超过150 kg K_2O ha〜（-1）的水平。

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