锌磷肥配施对水稻产量及生育性状的影响

The Effect of Coordinating Phosphorous-Zinc Fertilizer Application on Rice Yield and Growing Character

水稻施用锌肥的增产效果国内外已有不少报道，但在延边地区的土壤和气候条件下施用好肥却未见报道。本文通过锌磷肥配施试验证明，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为３．９１～８．０１％；锌磷配施的最佳组合是过石５００ｋｇ／ｈａ，七水硫酸锌１５ｋｇ／ｈａ，ｐ／ｚｈ比值为１１．３９；锌肥的主要增产作用是增加穗长和一、二次枝梗数，从而增加了每穗总粒数和实粒数。稻叶对锌的吸收在有效分蘖终止期达到高峰，为２９．２３ｐｐｍ左右；精米中的含锌量在１５．３２ｐｐｍ左右．植株地上部吸锌量在１．０６４—１．２６６ｍｇ／穴之间，施磷过量抑制根对锌的吸收和锌向穗部的转移。

Many theses reported on rice raising yield effect of applying Zn-fertilier, but that in the condition of Yanbian's soil and climate was no reports. 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%, their best combination wus superphosphate-Ca 500kg/ha, Zinc suffate 7H2O 15kg/ha, P and Zn ratio was 11.39. The main effect of Zn-fertilizer was that general grain amount and actual grain amount each car were increased by adding the first and second branch of rice ear. The Zn-absorbing of rice at the end of active tillering got to peak value, which was about 29.23ppm; Zn contcent of milled rice was about 15.32ppm. The Zn-assimilating in the upper stem was between 1.064 and 1.266mg/each hole. Fertilized P too high would reduced Zn -absorbing of rice and the Zn-transportion to ears.