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作 者 ：赵炳梓;徐富安

期 刊 ：植物营养与肥料学报 2000年 6卷 3期 页码：260-266

关键词：水肥；小麦；玉米；K吸收；

Keywords:irrigation water and nitrogen fertilizer, winter wheat, maize, N, P, K uptake,

摘 要 ：水、N是影响作物N、P、K吸收的重要因素。通过对 6个水分等级和 5个N肥等级相互搭配的研究结果表明 ,高水、高N处理不利于小麦N吸收 ,而玉米是耐肥作物 ,相同灌水条件下 ,玉米的吸N量随施N量的增加而增加。在低灌水条件下 (W 0、W 1处理 ) ,玉米子粒吸N量很低 ,变幅为 0～17.3kg/hm²,并且不受施N量的影响 ;而小麦子粒吸N量仍达 36.6～154.2kg/hm²。小麦与玉米吸P量的变化趋势与吸N量的变化趋势非常接近。但是 ,作物的吸K量随灌水量增加有明显增加的趋势 ,在玉米上表现尤其明显 ,并且作物的吸K量主要存在于茎秆中 ,因此 ,在当地推广和宣传秸秆还田很有必要

Abstract:Irrigation water and nitrogen fertilizer are key factors governing N, P, K uptake by crops. By studying on different combinations of irrigation water and nitrogen fertilizer which consist of six levels of irrigation water and five levels of N fertilizer, the experiment showed that treatments with high levels of irrigation water and high levels of nitrogen fertilizer were unfavorable for N uptake by winter wheat, while maize was fertilizer tolerable crop and the amount of N uptake by maize increased with nitrogen fertilizer when irrigation water remained constant. When irrigation water was in low level (such as: level of W0 or W1), the amount of N uptake by maize grain was very low which ranged from 0 to 17.3kg/hm² and was independent of applied nitrogen fertilizer, while the amount of N uptake by wheat grain reached as high as 36 6 to 154.2kg/hm². The curve of P uptake by both winter wheat and maize was similar to that of N uptake. However, the amount of K uptake by both of them increased with irrigation water, especially for maize. Moreover, most of absorbed K disturbed in the straw. Therefore, it is very important for us to publicize returning straw back to the farm field after harvest.

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