次生盐渍土垂向剖面斥水性及其与理化性质关系
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国家自然科学基金资助项目 (50709028)和西北农林科技大学基本科研业务费专项资金资助项目(QN2009087)


Relationship between Soil Water Repellency and Soil Physicalchemical Properties for Vertical Profiles in Secondary Saline Field
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    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。

    Abstract:

    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 10cm×10cm and 5cm×5cm, 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 40cm and the characteristics of soil water repellency were not obvious when the depth was deeper than 80cm. The soil moisture content and the soil water repellency appeared to be positively related at 0~40cm depth and negatively related at 40~80cm depth. Soil salt content and soil water repellency appeared to be positively related to the surface soil layer at 0~10cm depth but negatively related to the other depth. The pH value and the soil water repellency mostly were generally positively related. 

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任鑫,李毅,李敏,郭丽俊,丰满.次生盐渍土垂向剖面斥水性及其与理化性质关系[J].农业机械学报,2011,42(3):58-64,79. Ren Xin, Li Yi, Li Min, Guo Lijun, Feng Man. Relationship between Soil Water Repellency and Soil Physicalchemical Properties for Vertical Profiles in Secondary Saline Field[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(3):58-64,79.

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