摘要
农牧交错带发展人工草地的关键是土壤水分的适应性,针对年平均降水量250mm的地区,以人工甘草草地、人工苜蓿地、人工苜蓿混播甘草地和天然草地为对象,通过2010年观测,计算各种草地0-100cm土层质量含水量的均值、变异系数,分析土壤水分的空间分布特征;利用土壤水分平衡和土壤分层储水量公式计算不同草地0-100cm土层总储水量,结合试验地生长季降水量变化,分析不同草地储水量与消耗量以及0-20、20-60、60-100cm土层水分均值随植被生长季的变化规律。
The adaptibility to soil moisture is very important to developping the cultivated pasture in farmland pastroral ecotones. Under the condition of 250mm average precipitation, with the cultivated Licorice grassland, cultivated alfalfa grassland, cultivated alfalfa with licorice grassland and the natural grassland as research objects,the average and coefficient of variation of the soil moisture ranging from 0cm to 100cm of different grasslands were analyzed using the observation data of 2010 in order to illustrate the spatial characristics of soil moisture. The formula for soil moisture balance and moisture storage in different depth of soil was used to calculate the total soil moisture storage ranging from Ocm to lOOcm of different grasslands, then the changes of precipitation in test plotswere combined to analyze the soil moisture storage and moisture wastage of different grasslands and the change of 0 -20, 20 -60, 60 -lOOcm soil moisture with different grassland in growing season.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2012年第4期117-122,共6页
Journal of Arid Land Resources and Environment
基金
973计划前期研究专项(编号:2009CB426304)
国家自然科学基金项目(批准号:30960075)资助
关键词
土壤水分
草地类型
变异系数
储水量
soil moisture
grassland types
coefficient of variation
