保护性耕作对土壤养分及部分物理性状的影响  

Influence of Conservation Tillage on Soil Nutrients and some Physical Properties

作　　者：李月梅[1] 

机构地区：[1]青海省农林科学院土壤肥料研究所,西宁810016

出　　处：《农机化研究》2011年第11期148-152,共5页Journal of Agricultural Mechanization Research

基　　金：国家"十一五"科技支撑计划项目(2006BAD05B07)

摘　　要：以青海省互助县南门峡镇农田为研究对象,选取了留茬免耕(PA)、带状免耕旋播(PB)、秸秆还田免耕(PC)和常规耕翻(P0)4种耕作措施,对其土壤养分和部分物理性状进行研究。结果表明,保护性耕作能显著增加表层土层的养分含量,留茬免耕(PA)、带状免耕旋播(PB)、秸秆还田免耕(PC)3种保护性耕作处理的土壤氮素、有机碳均高于常规处理(P<0.05)。随着土层深度的增加,不同耕作方式下土壤全氮、碱解氮含量有所减少。保护性耕作能有效地改善土壤物理性质,提高土壤肥力,增加土壤水分。因此,保护性耕作能使土壤朝着有利于土壤质量提高的方向发展,是青海省半干旱地区农业发展值得推广的措施之一。The crop land in Nanmenxia Town,Huzhu county of Qinghai Province was selected as study area.Four cultivation measures,leaving the stubble in the farm without traditional plough（PA）,strip rotary tillage without traditional plough（PB）,straw manure（PC） and conventional tillage（P0） were used as different treatments.The results showed that conservation tillage can significantly increase nutrient content in surface soil.Conservation tillage Soil nitrogen,organic carbon of the three conservation tillage are higher than those of conventional treatment（P〈0.05）.Soil total nitrogen and available nitrogen content decease with soil depth increasing.Conservation tillage can improve soil physical properties,including increasing soil fertility and water content.Conservation tillage is helpful to enhance soil quality and should be extended to arid and semi-arid farmland region of Qinghai Province.

关 键 词：保护性耕作 春油菜 土壤养分 土壤物理性质 

分 类 号：S375[农业科学—农产品加工]