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耕作对旱区坡耕地土壤碳素转化及冬小麦产量的影响
引用本文:张洁,姚宇卿,吕军杰,王育红,金轲,王聪慧,胡博文,李俊红,丁志强.耕作对旱区坡耕地土壤碳素转化及冬小麦产量的影响[J].土壤通报,2007,38(5):882-886.
作者姓名:张洁  姚宇卿  吕军杰  王育红  金轲  王聪慧  胡博文  李俊红  丁志强
作者单位:1. 洛阳农业科学研究所,河南,洛阳,471022
2. 中国农科院,农业资源与区划所,北京,100081
3. 安阳北关区农委,河南,安阳,455000
基金项目:中国-比利时合作项目;国家粮食丰产科技工程项目
摘    要:利用长期定位试验(1999开始保护性耕作,2004年采样测定),在豫西旱区坡耕地上进行了不同耕作对土壤有机碳、微生物态碳及水分利用效率的影响研究。结果表明:深松覆盖和免耕覆盖处理的耕层有机碳增加较明显,以深松覆盖有机碳含量最高为6.79gkg-1,比传统耕作高13.82%,其次是免耕,较传统高11.58%,而少耕却较传统降低了1.38%,随着土层的加深,土壤有机碳含量降低,0~60cm有机碳平均值,深松和免耕较传统分别增加了14.08%、5.41%,少耕较传统减少1.12%。土壤微生物碳对耕作敏感,其含量免耕>深松>传统>少耕,分别为206.87mgkg-1、138.43mgkg-1、115.42mgkg-1和112.57mgkg-1,较传统增加79.3%、19.9%和-2.5%。土壤有机碳和土壤微生物态碳都有坡下富集现象。少耕、免耕、深松和传统的SMBC/SOC的值分别为1.91%、3.11%、2.04%和1.93%,免耕和深松对培肥地力、改善环境有好的应用前景;同时免耕覆盖与深松覆盖可提高产量,增产分别达10.22%与9.26%;可提高水分利用效率。

关 键 词:有机碳  微生物态碳  水分利用效率  保护性耕作  坡耕地
文章编号:0564-3945(2007)05-0882-05
修稿时间:2006年7月9日

Effects of Different Tillages on Soil Organic Carbon, Soil Microbial Biomass Carbon and Water Use Efficiency in the Slopping Field of Arid Areas
ZHANG Jie,YAO Yu-qing,LV Jun-jie,WANG Yu-hong,JIN Ke,WANG Cong-hui,HU Bo-wen,LI Jun-hong,DING Zhi-qiang.Effects of Different Tillages on Soil Organic Carbon, Soil Microbial Biomass Carbon and Water Use Efficiency in the Slopping Field of Arid Areas[J].Chinese Journal of Soil Science,2007,38(5):882-886.
Authors:ZHANG Jie  YAO Yu-qing  LV Jun-jie  WANG Yu-hong  JIN Ke  WANG Cong-hui  HU Bo-wen  LI Jun-hong  DING Zhi-qiang
Abstract:The effects of different tillages on the soil organic carbon(SOC),Soil microbial Biomass Carbon (SMBC) and Water Use Efficiency (WUE) in long-term locating field plots has been investigated in the slopping field of the semi-humid arid areas ,the west of Henan Province. The results showed as following the treatments with subsoiling tillage and no-till increased the SOC contents,especially in cultivated herizon,The most increase in SOC content was 6.79g kg-1 in subsoiling treatment. Comparing with conventional tillage,the SOC contents in subsoiling mulching and no-tillage increased by 13.82% and 11.58%.,but reduced tillage decreased by 1.38%. The average SOC contents in 0~60cm of the subsoiling and no-tillage increased by 14.08% and 5.41% respectively,but reduced tillage reduced by 1.12%.The deeper the layer was,the lower the SOC content did. The order of contents of SMBC was: no-tillage > subsoiling > conventional tillage >reduced tillage The rates of SMBC/SOC in reduced tillage,no-tillage,subsoiling and conventional tillage were 1.91%,3.11%,2.04% and 1.93% respectively. The no-tillage mulch and subsoiling mulch had higher productivity (10.22% and 9.26%) and WUE.
Keywords:Soil organic carbon(SOC)  Soil microbial Biomass Carbon (SMBC)  Water Use Efficiency  Conservational tillage  Sloping field
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