摘要
通过大田试验研究不同秸秆还田方式对土壤养分、微生物量及作物产量的影响,分析玉米秸秆直接还田、小麦秸秆直接还田、玉米秸秆+牛粪还田、小麦秸秆+牛粪还田及秸秆不还田时土壤碳、氮和小麦产量的变化.结果表明:成熟期4种秸秆还田处理提高土壤有机碳3.31%~31.97%、全氮9.48%~28.43%,增加土壤蔗糖酶活性79.48%~178.95%,分别提高土壤微生物量碳30.67%~116.24%、微生物量氮29.17%~94.96%,增产6.43%~29.82%,经济效益增加6.74%~19.31%,以小麦秸秆+牛粪还田处理最高.4种秸秆还田方式均能达到改善土壤质量、提高小麦产量的效果,其中以小麦秸秆+牛粪还田综合效应最佳.
The effects of different straw returning methods on soil nutrients, microbial biomass and crop yield were studied through field experiments. The effects of corn straw returning directly to the field（Ws）, straw＋corn returning to field（Ms ＋Cd）, wheat straw ＋ corn returning to field（Ws ＋ Cd）and straw does not return to the field（CK）on wheat soil carbon, nitrogen and wheat yield. The results showed that soil organic carbon was increased by 3.31% ~ 31.97%, total nitrogen was9.48% ~ 28.43% 0%, and soil invertase activity was increased by 79.48% ~ 178.95% at the maturity stage. Soil microbial biomass carbon and nitrogen 30.67% ~ 116.24%, 29.17% ~ 94.96%, yield 6.43% ~ 29.82%, economic benefits increased by 6.74% ~ 19.31%, and the highest was Ws ＋ Cd. Therefore, the four kinds of straw returning methods can all achieve the effect of improving the soil quality and increasing the wheat yield, of which the best combination of wheat straw and cow dung was the best.
作者
雍海燕
沙龙
Yong Haiyan;Sha Long(Ningxia Yinchuan Xixia Agricultural Technology Extension Service Center,Yinchuan 750021,China)
出处
《农业科学研究》
2018年第2期13-17,23,共6页
Journal of Agricultural Sciences
基金
宁夏"十三五"重大专项"设施蔬菜土壤质量健康评价与功能性土壤改良菌剂研发"(2016BN01-02)
关键词
秸秆还田
有机碳
全氮
微生物量碳氮
酶活性
产量
经济效益
straw returning
organic carbon
total nitrogen
microbial biomass carbon and nitrogen
enzyme activity
yield
economic benefit
