摘要
通过对采自彰武地区29个农田土壤剖面不同深度土壤颗粒的机械组成分析,根据粒径>0.1 mm与≤0.1 mm颗粒含量的比值DD(desertification degree)的大小,定量地划分农田土壤沙化程度等级,各等级为:Ⅰ(DD>5),极严重沙化;Ⅱ(2<DD≤5),严重沙化;Ⅲ(1<DD≤2),中度沙化;Ⅳ(DD≤1),轻度沙化。并以此初步探讨了彰武地区农田沙化的分布规律。结果表明:农田沙化程度分布从总体来看,彰武北部和东北部地区沙化较严重,彰武中部和南部地区沙化程度较轻。
By analyzing the mechanical composition of soil particles in different profile depth of 29 farmlands in Zhangwu County, the desertification degree （DD） of farmland soil was qnantificationally classified, based on the rate of large particle （ 〉0. 1mm） content to small particle （≤0. 1mm） content. The hierarchies were as follows： Ⅰ （DD〉5）, very severe; Ⅱ （2〈DD≤5）, severe; Ⅲ（1〈DD≤2）, moderate;Ⅳ（DD≤1）, light. According to this hierarchy system, the distribution law of farmland desertification in Zhangwu County was studied primarily. The results indicated that the desertification degree was relatively severe in the north and northeast of Zhangwu County, while it was light in the midst and the south.
出处
《干旱地区农业研究》
CSCD
北大核心
2006年第4期172-175,共4页
Agricultural Research in the Arid Areas
基金
农业部"发展生态农业
治理沙漠化土地"子项目"彰武农牧交替带生态农业建设与示范
彰武保护性耕作效果监测"
关键词
机械组成
农田沙化
分布规律
mechanical composition
farmland desertification
distribution law
