寒地稻草还田对土壤养分和水稻产量的影响

Effect of Rice Straw Incorporation on Soil Nutrient and Rice Yield in Frigid Zone

通过田间小区试验,研究寒地稻草还田对土壤养分含量和水稻产量的影响。结果表明,不同还田量处理的土壤养分含量与对照相比没有显著差异,但增加还田量利于土壤养分含量的增加;还田量4.5t/hm2和还田量9.0 t/hm2的处理在水稻产量、有效穗数、千粒重等方面与对照的差异不显著(还田量4.5t/hm2并配施纯氮45 kg/hm2的处理除外)。在寒地稻草还田中以还田量9.0 t/hm2并配施纯氮135 kg/hm2的产量最高。

The effect of rice straw incorporation on soil nutrient and rice yield was studied using Kendao 12 as the material through field experiment.There was no significant difference in soil nutrient contents between the rice straw removal treatment and the rice-straw incorporation treatment,but the accumulation of soil nutrients increased with the increasing of application amount of rice straw returned.There was no significant difference among the rice straw incorporation of 4.5 t/hm2,rice straw incorporation of 9.0 t/hm2 and the rice straw removal treatment in panicles,1 000-grain weight and grain yield.The rice straw incorporation of 9.0 t/hm2 plus 135 kg pure nitrogen conduced the highest yield and was adequate to be applied in frigid zone.