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次生鹽漬土垂向剖面斥水性及其與理化性質(zhì)關(guān)系
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國家自然科學(xué)基金資助項(xiàng)目 (50709028)和西北農(nóng)林科技大學(xué)基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)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:

    為探求土壤剖面斥水性的變化規(guī)律及其與土壤水鹽含量、pH值的關(guān)系,在新疆新墾膜下滴灌棉田以10 cm×10 cm和5cm×5cm的網(wǎng)格等間距采集兩個土壤剖面樣品,對剖面土壤的斥水性、含水率、含鹽量和pH值了進(jìn)行經(jīng)典統(tǒng)計、地學(xué)統(tǒng)計和相關(guān)性分析。結(jié)果表明:次生鹽漬土剖面斥水性呈中等程度變異,空間自相關(guān)性中等偏弱;土壤斥水性在40cm深度附近時最強(qiáng),在大于80cm深度的土層斥水特征不明顯;在0~40cm深度土層,含水率與土壤斥水性正相關(guān),在40~80cm深度與斥水性負(fù)相關(guān);含鹽量除在0~10cm的表層與斥水性正相關(guān)外,在其余土層均為負(fù)相關(guān); pH值與斥水性之間多為正相關(guān)。

    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,郭麗俊,豐滿.次生鹽漬土垂向剖面斥水性及其與理化性質(zhì)關(guān)系[J].農(nóng)業(yè)機(jī)械學(xué)報,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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