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耕作措施对土壤水热特性和微生物生物量碳的影响
引用本文:庞绪,何文清,严昌荣,刘恩科,刘爽,殷涛.耕作措施对土壤水热特性和微生物生物量碳的影响[J].生态学报,2013,33(4):1308-1316.
作者姓名:庞绪  何文清  严昌荣  刘恩科  刘爽  殷涛
作者单位:中国农业科学院农业环境与可持续发展研究所,北京100081;农业部旱作节水农业重点开放实验室,北京100081
基金项目:国家自然科学基金资助项目(31171512, 31000253, 31170490);国家973项目"华北农业和社会经济对气候灾害的适应能力研究"(2012CB955904);国家"十二五"科技支撑计划"旱作农业关键技术研究与示范"项目(2011BAD09B01)
摘    要:通过山西寿阳设置的8a田间定位试验,比较了全量秸秆还田、免耕覆盖和常规耕作3种耕作措施下土壤含水量、温度及土壤微生物生物量碳变化.结果表明:免耕覆盖与全量还田处理显著提高土壤含水量,与常规耕作相比表层土壤体积含水量在玉米苗期、拔节期、灌浆期和成熟期分别高出18%、22%、29%、21%和3%、10%、12%、13%,具有保水保墒的作用.在苗期不同耕作措施对土壤温度的影响达到显著水平,5 cm处免耕覆盖、全量还田与常规耕作处理土壤温度依次为:18.12、18.76和19.44℃,免耕覆盖和全量还田处理平均温度比常规耕作分别低1.32℃和0.69℃.土壤微生物量碳在整个生育期动态变化是首先迅速上升在玉米生育高峰期(拔节期)达到最高峰,然后开始下降,成熟期趋于平缓.免耕覆盖与全量还田处理下玉米各生育期土壤表层微生物量碳显著高于常规耕作,在苗期、拔节期、灌浆期和成熟期分别比常规耕作高出70%、40%、85%和30%和10%、20%、15%和15%.土壤微生物量碳与土壤温度和土壤含水量相关和极相关.

关 键 词:土壤微生物量碳  耕作措施  土壤温度  土壤含水量
收稿时间:2012/6/22 0:00:00
修稿时间:2012/12/24 0:00:00

Effect of tillage and residue management on dynamic of soil microbial biomass carbon
PANG Xu,HE Wenqing,YAN Changrong,LIU Enke,LIU Shuang and YIN Tao.Effect of tillage and residue management on dynamic of soil microbial biomass carbon[J].Acta Ecologica Sinica,2013,33(4):1308-1316.
Authors:PANG Xu  HE Wenqing  YAN Changrong  LIU Enke  LIU Shuang and YIN Tao
Institution:Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China;Key laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, China;Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China;Key laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, China;Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China;Key laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, China;Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China;Key laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, China;Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China;Key laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, China;Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China;Key laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, China
Abstract:
Keywords:soil microbial biomass carbon  tillage treatment  soil moisture and temperature
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