宁南山区梯田土壤水分及养分特征时空变异性研究  

The temporal-spacial change of soil moisture and nutrients on terrace in the mountainous region of southern Ningxia

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

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

出　　处：《干旱地区农业研究》2005年第5期83-87,共5页Agricultural Research in the Arid Areas

基　　金："十五"国家科技攻关计划重大项目(2001BA606-04)资助

摘　　要：主要分析了水平梯田不同位置土壤水分的变化与不同年限修建水平梯田化学特性的变化.结果表明:水平梯田0～100 cm土层土壤水分,从内侧到外侧,水分逐渐减少且随梯田宽度增加,变化更加明显.不同年限修建的水平梯田,土壤养分在初期有一定的养分消耗,随时间的推移,养分含量逐渐增加,并且越接近地表,养分变化越大,0～60 cm土层养分表现最明显,60 cm以下养分变化趋于平稳.The paper primarily analyzes the change of soil moisture in different sections of level terrace and the change of chemical properties on terrace constructed in different years. The result shows that on level terrace, the soil moisture at 0- 100cm layer tends to be decreased from inner section to outer section, and the change is more apparent when the breadth of terrace is increased. As for soil nutrients, there is a depleting period in the preliminary period after the terrace is constructed, and they tend to be increased as the time passes, especially in the soil layers near to the land surface. The change of nutrients is extraordinarily apparent in 0-60 cm soil layer, but is relatively stable in the lower soil layer.

关 键 词：水平梯田 土壤水分 地力特征 宁南山区 

分 类 号：S152.7[农业科学—土壤学] S158.3[农业科学—农业基础科学]