摘要
研究旨在明确稻麦轮作下秸秆还田对土壤基础养分的影响。以稻麦轮作系统为研究对象,采用Meta分析方法定量研究了土壤基础养分对秸秆还田的响应及其影响因素。结果表明,短期内(<2年)秸秆还田能够显著提升土壤有机碳和活性有机碳的含量,其中活性有机碳对秸秆还田的响应程度要高于总有机碳。低秸秆还田量(RS <3750 kg hm^-2和WS <3000 kg hm^-2)对土壤基础养分的提升效果不显著,而全量秸秆还田(RS 3000~6000 kg hm^-2和WS 3750~7000 kg hm^-2)能够显著提升土壤速效磷、有机碳和活性有机碳的含量。对于不同耕作措施而言,旋耕或翻耕措施均可以显著提升土壤有机碳的含量;此外,旋耕显著提高全氮和活性有机碳的含量,翻耕显著提高土壤速效磷和速效钾的含量。稻麦轮作下秸秆全量还田配合旋耕或者翻耕措施能够增加土壤基础养分含量,达到土壤地力培育的效果。
The meta-analysis method was adopted to investigate the response of soil basic nutrients to straw returning and their influencing factors in the rice-wheat rotation system. The straw returning to the field in the short term(< 2 years) significantly increased the contents of soil organic carbon(C) and active organic C. And the response of active organic C to straw returning was higher than that of total organic C. Low amounts of rice straw(RS) returning(< 3750 kg hm^-2) and wheat straw(WS) returning(< 3000 kg hm^-2) had no significant effects on the improvement of soil basic nutrients, while full straw returning(RS amount of 3000-6000 kg hm^-2 and WS amount of 3750-7000 kg hm^-2)significantly increased the contents of soil available phosphorus(P), organic C and active organic C. The content of soil organic C was significantly increased in the rotation tillage and plow tillage. Additionally, rotation tillage significantly increased the contents of total nitrogen and active organic C in soil, and plow tillage significantly increased the contents of soil available P and available potassium. The full straw returning to the field combined with rotary tillage or plow tillage increased the contents of soil nutrients in rice-wheat rotation system and could improve soil fertility.
作者
张志毅
范先鹏
夏贤格
杨利
刘冬碧
张富林
熊桂云
吴茂前
冯婷婷
ZHANG Zhi-yi;FAN Xian-peng;XIA Xian-ge;YANG Li;LIU Dong-bi;ZHANG Fu-lin;XIONG Gui-yun;WU Mao-qian;FENG Ting-ting(Plant Protection, Soil and Fertilizer Research Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China;Qianjiang Scientific Observing and Experimental Station of Agro-Environment and Arable Land Conservation, Ministry of Agriculture, Qianjing 433116, China;Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture, Wuhan 430064, China;Yangtze University, Jingzhou 434000, China)
出处
《土壤通报》
CAS
CSCD
北大核心
2019年第2期401-406,共6页
Chinese Journal of Soil Science
基金
国家重点研发计划项目(2016YFD0300902-04)
湖北省农业科学院重大专项(2017CGPY03)资助
关键词
稻麦轮作
秸秆还田
还田年限
还田量
耕作措施
Rice-wheat rotation system
Straw returning
Returning year
Returning amount
Tillage method
