不同养分和水分管理模式对土壤生态环境影响  

Effects of Nutrient and Water Regimes on Paddy Soil Eco-Environment.

作　　者：杨长明[1] 杨林章[1] 颜廷梅[1] 

机构地区：[1]中国科学院南京土壤研究所,江苏南京210008

出　　处：《农村生态环境》2002年第3期11-15,共5页Rural Eco-Environment

基　　金："973"国家重点基础研究发展规划项目(G1999011802)

摘　　要：室内盆栽培养下 ,通过对土壤pH、Eh、有机质、Fe形态、容重和结构等主要理化性质指标的测定和分析 ,比较和研究了不同养分和水分管理模式对土壤生态环境的影响。结果表明 ,在连续淹水下 ,施用有机肥料 ,特别是厩肥 ,降低了土壤Eh ,加剧了土壤的还原状态 ,同时也使土壤无定型态铁氧化物含量上升 ,对改善土壤物理环境效果也明显削弱 ;在干湿交替下 ,有机无机肥料配施不但可提高土壤有机质 。An indoor pot experiment was carried out to study systematically the effects of nutrient and water regimes on soil eco environment by measuring and comparing changes in soil physical and chemical properties,such as soil pH,redox potential(Eh),organic matter,transformation of Fe and Mn,soil bulk density and soil porosity.Results indicated that under continuous flooding(CLW),organic manure,especially barnyard manure,decreased soil Eh and aggravated soil reduction process,which resulted in increase in amorphous Fe 2O 3.In addition,its effect on improving soil physical environment was also weakened significantly.Under the alternation of dry and wet conditions(ADW),combined application of chemical fertilizers and organic manure not only increased soil organic matter content but also markedly improved soil oxidation reduction conditions and physical properties.

关 键 词：水稻土 养分管理模式 水分管理模式 土壤生态环境 环境影响 

分 类 号：S154.1[农业科学—土壤学]