【作者】 苏都； 红梅； 陈有君； 韩国栋； 王忠武；

【Author】 Su Du;Hong Mei;CHEN You-jun;HAN Guo-dong;WANG Zhong-wu;Inner Mongolia Agricultural University;Inner Mongolia Hulunbeir Agricultural Technology Service Center;

【机构】 内蒙古呼伦贝尔市农业技术推广服务中心； 内蒙古农业大学；

【摘要】 本论文以经典统计学和地统计学为理论基础,内蒙古短花针茅(Stipa brev*flora)荒漠草原为研究对象,初步揭示了不同放牧强度条件下淡栗钙土水分的时序动态、空间分布和空间变异特征。结果表明:受降水影响,2010年土壤水分动态波动比2009年大,变化强烈。随着土层的加深,土壤水分的时序波动逐渐变小。放牧使深层土壤水分略有增加。土壤水分变异系数随着土层的加深而降低。随着放牧强度的增加,空间变异性减弱,空间相关性变强。从土壤水分空间分布来看,表层(0~20 cm)土壤含水量在对照处理中的高值斑块比其它放牧区的多,中间层(40~60 cm)土壤水分表现随机性分布,但是在深层(60~80 cm)中高值斑块主要集中在重度放牧区。更多还原

【Abstract】 In the present study,we investigated the Stipa breviflora desert steppe in Inner Mongolia based on the classical statistics and geostatistics and preliminarily revealed the time-series dynamics,spatial distribution and variation of light chestnut soil moisture in different grazing intensity conditions.The results indicated that,compared with 2009,the variation of soil water content was stronger due to the influence of precipitation.Grazing slightly increased the water content in deep soil.With the deepening of soil layer,the variation of soil water content decreased.The spatial variation weakened whereas the spatial correlation strengthened when grazing intensity increased.As far as the spatial distribution of soil water,the patch of high soil water content(0-20 cm) in CK is more than that in other grazing plots,and shows a random distribution in(40-60 cm) layer.However,the patch of high soil water content in(60-80cm) layer is mainly concentrated on the plots of high grazing.更多还原