摘要
为探求土壤剖面斥水性的变化规律及其与土壤水盐含量、pH值的关系,在新疆新垦膜下滴灌棉田以10 cm×10 cm和5 cm×5 cm的网格等间距采集两个土壤剖面样品,对剖面土壤的斥水性、含水率、含盐量和pH值了进行经典统计、地学统计和相关性分析。结果表明：次生盐渍土剖面斥水性呈中等程度变异,空间自相关性中等偏弱;土壤斥水性在40 cm深度附近时最强,在大于80 cm深度的土层斥水特征不明显;在0-40 cm深度土层,含水率与土壤斥水性正相关,在40-80 cm深度与斥水性负相关;含盐量除在0-10 cm的表层与斥水性正相关外,在其余土层均为负相关;pH值与斥水性之间多为正相关。
In order to seek the variations of soil water repellency and its relationship with soil moisture content,soil salt content and pH value,soils samples were collected in two profiles at two grids（intervals were 10cm×10cm and 5cm×5cm,respectively） in a newly cultivated cotton field mulched with plastic film and irrigated with trickle method in Xinjiang.The soil water repellency,soil moisture content,soil salt content and pH value of the profiles were tested and analyzed using the methods of classical statistics,geostatistics and correlation analysis.The results showed that the soil water repellency had moderate variability and the spatial auto-correlation was under the level of the middle class in secondary saline field profiles.The strongest soil water repellency appeared around the depth of 40cm and the characteristics of soil water repellency were not obvious when the depth was deeper than 80cm.The soil moisture content and the soil water repellency appeared to be positively related at 0-40cm depth and negatively related at 40-80cm depth.Soil salt content and soil water repellency appeared to be positively related to the surface soil layer at 0-10cm depth but negatively related to the other depth.The pH value and the soil water repellency mostly were generally positively related.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2011年第3期58-64,79,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(50709028)
西北农林科技大学基本科研业务费专项资金资助项目(QN2009087)
关键词
次生盐渍土
斥水性
垂向剖面
土壤理化性质
相关性分析
Secondary saline field
Soil water repellency
Vertical profiles
Soil physio-chemical properties
Correlation analysis
