摘要
为了研究紫云英和秸秆还田下土壤团聚体及有机碳的分布特征。选取湖北省荆州市水稻—紫云英轮作定位试验,通过湿筛和密度分级的方法研究团聚体和有机碳。结果表明:各粒级团聚体含量以>5 mm为主(57.08%~80.01%),紫云英和秸秆还田增加>5 mm团聚体的含量与团聚体的稳定性。紫云英还田配施化肥(NPK+G)和紫云英和秸秆还田配施化肥(NPK+G+S)处理显著增加5~2、2~0.25 mm团聚体中有机碳的含量。团聚体内以矿物结合态有机碳为主,不同处理均提高团聚体内矿物结合态有机碳及微团聚体内细颗粒有机碳的含量,降低粗颗粒有机碳的含量。相比于对照(CK),紫云英和秸秆还田提高了团聚体的稳定性,并促进了团聚体内细颗粒有机碳的积累。
To study the distribution characteristics of soil aggregates and organic carbon under Chinese milk vetch and straw returning, we selected the rice-Chinese milk vetch rotation experiment in Jingzhou, Hubei,and studied the aggregates and organic carbon by the methods of wet sieve and density fractionation. The results showed that: the content of aggregates in each particle size was mainly >5 mm(57.08%-80.01%), and Chinese milk vetch and straw returning increased the content of aggregates >5 mm and the stability of aggregates;the treatment of Chinese milk vetch returning with chemical fertilizer(NPK+G) and Chinese milk vetch and straw returning with fertilizer(NPK+G+S) significantly increased the content of organic carbon in the aggregates of 5-2 mm, 2-0.25 mm;the aggregates were mainly dominated by the mineral-associated organic carbon;different treatments increased the content of mineral-associated organic carbon and fine particulate organic carbon in aggregates, and reduced the content of coarse particulate organic carbon. Compared with the control(CK), the Chinese milk vetch and straw returning could increase the stability of aggregates and promote the accumulation of fine particulate organic carbon in aggregates.
作者
周方亮
李峰
黄雅楠
徐永昊
耿明建
黄丽
Zhou Fangliang;Li Feng;Huang Ya’nan;Xu Yonghao;Geng Mingjian;Huang Li(Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River),Ministry of Agriculture and Rural Affairs,Huazhong Agricultural University,Wuhan 430070)
出处
《中国农学通报》
2020年第20期65-71,共7页
Chinese Agricultural Science Bulletin
基金
国家绿肥产业技术体系(CARS-22)
公益性行业(农业)科研专项经费项目“水田两熟区耕地培肥与合理农作制”(201503122)
关键词
紫云英
秸秆
土壤团聚体
有机碳
密度分组
团聚体稳定性
Chinese milk vetch
straw
soil aggregates
organic carbon
density fractionation
the stability of aggregates
作者简介
第一作者简介:周方亮,男,1993 年出生,河南平顶山人,硕士,研究方向:土壤化学。通信地址:430070 湖北省武汉市洪山区狮子山街1 号华中农业大学资源与环境学院,Tel:027-87282137,E-mail:942696809@qq.com。;通讯作者:黄丽,女,1968 年出生,湖北人,教授,博士,主要从事土壤化学与肥力方向的研究。通信地址:430070 湖北省武汉市洪山区狮子山街1 号华中农业大学资源与环境学院,Tel:027-87282137,E-mail:daisyh@mail.hzau.edu.cn。
