半干旱退化山区坡改梯地土壤养分变异特征研究——以宁夏彭阳县为例  

Research on Variation Characteristics of Soil Nutrient After Slope Land Changed Into the Terrace in Semi-arid Degenerated Mountainous Area——Taking Ningxia PengYang Country as Example

作　　者：张源润[1] 蔡进军[2] 董立国[1] 王月玲[1] 季波[1] 火勇[1] 

机构地区：[1]宁夏农林科学院荒漠化治理研究所,银川750002 [2]彭阳县农业技术推广中心,彭阳756105

出　　处：《干旱区资源与环境》2007年第3期121-124,共4页Journal of Arid Land Resources and Environment

基　　金：国家"十五"国家科技攻关课题"半干旱退化山区生态农业建设技术与示范(2000BA606A-04)

摘　　要：本文通过对半干旱退化山区经过坡改梯不同年限土壤资料分析,土壤有机质和氮素随与坡改梯时间呈正相关,在作物根系活动层0-60cm土壤有机质、氮素增量高于对照,土壤速效磷增幅较小;土壤速效钾有少量增加。在该地区的生态建设中,大力开展平田整地,能逐步改善土壤的理化性质,提高土壤肥力质量。The analysis of terrace soil of different years in semi-arid degenerated mountainous area showed that the soil organic matters and the nitrogen were correlated to the time of slope changing terrace. At the crop root layer of 0-60cm , soil organic matters and the nitrogen increased higher than the comparison, the soil fast-acting phosphorus increased slowly. The soil fast-acting potassium showed little increases. In this local ecology construction, flatting field can improve the soil physical and chemical nature gradually and the soil fertility quality.

关 键 词：坡改梯 土壤 养分 

分 类 号：S158.3[农业科学—土壤学]