摘要
为探讨西辽河平原灌区玉米秸秆还田适宜模式,于2016年在连作玉米田设深翻秸秆还田(DR)、旋耕秸秆还田(RR)、深翻秸秆还田施用腐熟剂(DR+D)和旋耕秸秆还田施用腐熟剂(RR+D)4个处理,以旋耕不还田(CK)为对照,研究不同还田模式对土壤速效养分、土壤酶活性和玉米产量的影响。结果表明:RR+D和RR分别较CK增产24.56%和28.00%,DR和DR+D产量与CK无显著差异。RR+D处理显著(P<0.05)提高了表层(0~10 cm)土壤碱解氮含量(增幅94.56%),其他处理表层土壤速效养分含量与CK无显著差异。各秸秆还田处理可不同程度提高不同土层土壤酶的活性。综合来看,该地区以旋耕秸秆还田施用腐熟剂模式的效果较好。
In order to explore the suitable mode of maize straw returning in west Liaohe Plain,4 modes,i. e. deep plowing with straw returning( DR),rotary tillage with straw returning( RR),applying decomposing agent + deep plowing with straw returning( DR + D) and applying decomposing agent + rotary tillage with straw returning( RR +D) were proposed. By taking rotary tillage without straw returning( CK) as control,effects of 4 modes on soill available nutrients,soil enzyme activity and maize yield were compared in 2016. It was shown that RR + D and RR increased maize yield by 24. 56% and 28. 00%,respectively,as compared to CK,yet there was no significant difference within the yield of DR,DR + D and CK. RR + D significantly( P < 0. 05) increased the alkaline nitrogen content in 0-10 cm soil layer by 94. 56% than CK,while the other treatments showed no significant difference in soil available nutrients contents. All 4 maize straw returning modes could increase soil enzymes activities in different soil depth by varied degrees. On the whole,applying decomposing agent + rotary tillage with straw returning was the optimum mode in the study area.
出处
《浙江农业学报》
CSCD
北大核心
2018年第2期268-274,共7页
Acta Agriculturae Zhejiangensis
基金
国家科技支撑计划(2013BAD07B04)
内蒙古民族大学博士科研启动基金(BS329)
关键词
秸秆还田
腐熟剂
产量
土壤速效养分
土壤酶活性
straw returning
decomposing agent
yield
soil available nutrient
soil enzyme activity
