不同侧深施肥方式对寒地水稻生长、产量及肥料利用率的影响

Effects of Different Side Deep Fertilization Methods on Growth,Yield and Nitrogen Use Efficiency of Rice in Cold Region

为了保证水稻侧深施肥技术发挥最佳的节本增产增收效果,以水稻品种龙粳31为试验材料,通过大田随机区组设计,研究了不同侧深施肥处理对水稻生长、产量及肥料利用率的影响。结果表明,侧深施肥4种施肥方式均有利于水稻分蘖早生快发,单株分蘖数较对照增多,分蘖成穗率高,水稻产量均高于对照。其中,基蘖肥侧深同施处理的分蘖数及成穗率最高,产量高达9.97 t/hm2;肥料利用率则表现为,基蘖肥侧深同施方式有利于水稻氮素的吸收与积累,且氮素农学利用率高达55.3%,氮素偏生产力高达105.5 kg/kg,与对照差异极显著。试验结果说明基蘖肥侧深同施方式同时提高了水稻的产量及肥料利用率,是一种有效的施肥方式。

In order to ensure the best effects of the deep fertilization on the yield of rice, a field experiment was carried out to explore the growth, yield and fertilizer utilization of rice under different side deep fertilization methods, using Longgeng 31 as material. The results showed that 4 kinds of fertilization methods were beneficial to early tillering and fast tillering of rice, the tiller number of per plant and spike rate were higher than that of the control. The yield of the 4 treatments was higher than the control. The yield of base tillering fertilizer side depth treatment was the highest, the nitrogen use efficiency of agronomy was up to 55.3%, nitrogen partial productivity was up to 105.5 kg/kg, it was significantly higher than the control.