坝上高原不同土地利用类型耕层土壤含水量对比——以康保县为例  

Comparative Tillage Layer Soil Moisture in Different Land Types on Bashang Plateau——case study of Kangbao county

作　　者：张素芳[1] 马礼[1] 刘姣娜[1] 

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048

出　　处：《首都师范大学学报（自然科学版）》2013年第1期66-71,共6页Journal of Capital Normal University：Natural Science Edition

基　　金：国家自然科学基金项目(41071068;40671006);北京市自然科学基金项目(8102011)

摘　　要：分别在坝上高原康保县3个综合农业区相互毗邻的耕地、草地、灌木林地和乔木林地4种不同土地利用类型地块进行土壤采样,测定距地表约20 cm、30 cm耕层土壤水分百分比,结合野外考察、农户走访,对比分析了不同土地利用类型地块耕层涵养土壤水的能力.结果表明:耕地和草地土壤含水量普遍高于乔木林地,灌木林地居中;留茬耕地高于春翻耕地;留茬耕地和草地约20 cm深土层土壤含水量普遍低于30 cm深处,乔木林地与之相反,灌木林地无明显规律.建议在生态恢复重建中重点还草还灌植被,注重草灌乔混交模式;耕地采用保护性留茬,晚翻耕或免耕.Select Kangbao County of Bashang Plateau, monitor the soil moisture from the surface about 20cm and 30cm in different land types, including typical farmland, woodland, grassland which neighboring each other. The results indicated that cultivated land and grassland soil water content higher than arbor land, shrub land in the middle. Stubble cultivated land higher than spring plow tillage. Soil moisture content in 20cm deep generally less than 30 cm deep in stubble cultivated land and grassland, arbor land to the contrary, no obvious law in shrub land. It explains that in local semi - arid climate conditions, herbaceous vegetation＇ s conserve soil water ability stronger than arboreal vegetation, shrub vegetation in the middle. Suggest the ecological restoration and reconstruction works emphasis in return herbaceous vegetation and shrub vegetation, pay attention to the grass shrub and arbor mixed mode ; cultivated land take protective stubble, late tillage or no-till.

关 键 词：土壤含水量 耕地 草地 林地 半干旱地区 

分 类 号：P642.11[天文地球—工程地质学]