春小麦钾素吸收、积累与分配规律的研究

为了给高产栽培提供理论上的支持，在不同密度和施肥条件下，对春小麦钾素的吸收、积累动态进行系统的研究。结果表明，春小麦全生育期内植株体内含钾量呈逐渐下降趋势，在苗期至分蘖末期最高，到完熟期降至一生中最低值。春小麦一生中吸钾高峰在分蘖末期。且因不同密度、施肥处理表现一定差异。高密度、高钾肥处理吸收钾素相对较多，而氮磷钾平衡配施处理对钾素的吸收量始终维持在较高水平，且经济产量最高。春小麦一生中钾素的积累量与生育进程间的关系符合二次曲线变化。

Principle of K Assimilation, Accumulation and Distribution of Spring Wheat

This experiment was conducted to study K assimilation and accumulation of spring wheat. The result showed that the K content gradually reduced in plant during the period of life. It was the most from late emergence to tillering stage, and reduced to the lowest at ripening stage. K was assimilated the most in the end of tillering stage. There were some differences in assimilation among different density and fertilization treatments. Under high density and high K fertilization, more K was assimilated and the K assimilation always kept a higher level in the treatment that balanced to fertilize N,P,K, and the economic yield was higher. With growth, K accumulated amount accorded with double-equation.