不同布点方式的膜下滴灌棉田土壤水分的空间变异研究

Study on Spatial Variability of Cotton Soil Moisture Parameter under Mulch Drip Irrigation at Different Sampling Point

以新疆生产建设兵团石河子国家农业科技园区的膜下滴灌棉田作为试验区,采用随机法布点方式和均匀布点方式,利用地统计学理论分析了棉花膜下滴灌条件下土壤含水率的空间变异规律。结果表明,随机采样布点方式优于均匀采样布点方式;膜下滴灌棉田不同采样方式下的0-20 cm层的变异性变化最大,其它层的变化较小;膜下滴灌棉田土壤含水率20-40 cm和40-60 cm层的空间变异强度属弱变异,60-80 cm和80-100 cm层的空间变异强度属弱变异及中等变异。

Taking typical field in the National Agricultural Science and Technology zone of the Xinjiang Production and Construction Crops in Shihhotze as an example,Geo-statistics were used to analyze spatial variability of soil moisture in cotton field under mulch drip irrigation.The results show that the random sampling point is better than the arrage sampling point.There were the greatest variability between 0-20 cm layers in different sampling patterns under mulch drip irrigation,but less variability in other layers.There were weak variabilities between 20-40 cm and 40-60 cm layers of soil moisture in cotton field under mulch drip irrigation.The spatial variabilities of soil moisture between 60-80 cm and 80-100 cm were found to be weak or middle variabilitie.