摘要
水稻秸秆还田可以减少环境污染、培肥土壤,是未来水稻生产的发展趋势。试验设置水稻秸秆还田和不还田两个处理,研究了水稻生育期内土壤溶液中的无机氮(NH4+-N和NO3--N)、磷(P2O5)、钾(K2O)的含量变化。结果表明,秸秆还田使土壤溶液中铵态氮(NH4+-N)含量增加,而对硝态氮(NO3--N)含量的影响则是前期两个处理含量相近,而后期秸秆还田处理降低了土壤溶液中硝态氮(NO3--N)含量。秸秆的施入降低了水稻生育前期土壤溶液中磷的浓度,而随着生育期的推进,秸秆还田处理中磷的含量逐渐增加,并超过不还田处理中的含量。土壤溶液中钾的含量因秸秆施入变化最为明显,在整个生育期内,始终表现为秸秆还田处理高于不还田处理。
Rice straw returning can reduce environmental pollution and improve the fertility of soil. This research was conducted in experiment and practical base of Northeast Agricultural University with two treatments, straw returning and no straw returning to rice field and study the change of inorganic nitrogen, phosphorus and potassium content in soil solution. The results showed that the content of NH4^＋-N increased in the treatment of straw returning, and the concentration of NO3^--N showed as two main respects： two treatments were similar in earlier stage and NO3^--N was reduced by straw returning in later period. The concentration of P was decreased by application of straws at earlier stage, and the content of P increased gradually and exceeded the content of no returning with growth stage progressing. The change of K was the most obvious because of straw application. The content of K in the straw returning treatment was higher than that of no returning during the whole growth period.
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2010年第4期43-48,共6页
Journal of Northeast Agricultural University
基金
国家科技支撑计划(2007BAD89B05)
关键词
水稻
秸秆还田
养分
rice
straw returning
nutrient
