水稻的锌素营养及其吸收利用规律的研究

Study on Regular of Rice Zinc Nourishment and Absorption

在粘壤质草甸型水稻土上，锌磷肥配合施用对水稻的增产效果是３．９１～８．０１％．水稻对锌肥的吸收强度在有效分蘖终止期最高，而积累量在减数分裂期达到高峰．乳熟末期稻株地上部锌的积累量为１．０６４～１．２６６ｍｇ／穴；锌在稻株体内的分布规律是由下往上逐渐减少．精米中锌的浓度在１５．３２ｐｐｍ左右，锌肥的利用率只有０．５７—１．０５％。

Abstract Through coordinating P-Zn fertilizer application in the rice soil of clay loam-meadow type, the raising yield effect of coordinating P-Zn fertilizer application was 3.91-8.01%.The Zn. absorbing of rice at the end of active tillering got to peak value. The zinc accumulating of rice aerial part got to 1.064-1.266mg.Zinc distribution regular reduced gradually from bottom to top.Zn content of milled rice was about 15.32ppm.Utilization percent of Zn-fertilizer was only 0.57-1.05%.Application rates of Zn-fertilizer was good at 15-20kg/ha.