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媯水河流域土壤斥水性分布與影響因素研究
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流域水循環(huán)模擬與調(diào)控國家重點實驗室項目(2015ZY01、2016ZY01)、國家重點研發(fā)計劃項目(2016YFC0401407)和國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)項目(2015CB452701)


Spatial Distribution and Effect Factors of Soil Water Repellency in Guishui River Basin
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    摘要:

    為了研究我國北方土石山區(qū)流域土壤斥水性影響因素及其分布規(guī)律,以媯水河流域為例開展了野外調(diào)查和室內(nèi)研究。對流域內(nèi)9種植被類型共385個土壤樣本的滴水穿透時間(Water drop penetration time,WDPT)與土壤有機質(zhì)含量、pH值、質(zhì)量分形維數(shù)、土壤顆粒比表面積進行統(tǒng)計分析。研究表明:WDPT由大到小依次為有林地、灌木林、疏林地、果園、高覆蓋度草地、旱地、中覆蓋度草地、低覆蓋度草地、灘地。有林地和灌木林為強烈斥水性,疏林地和果園為輕微斥水性,高覆蓋度草地無斥水性,旱地、中覆蓋度草地、低覆蓋度草地和灘地為親水性;土壤斥水性在流域的空間分布上表現(xiàn)為西北部、東北部和東南部山區(qū)斥水性較大,中部盆地斥水性較小;在垂向分布上表現(xiàn)為表層最大、中層次之、深層最??;WDPT與土壤有機質(zhì)含量呈正相關(guān)性,與pH值、質(zhì)量分形維數(shù)、土壤顆粒比表面積呈負相關(guān)性;土壤pH值和有機質(zhì)含量是斥水性的主要影響因素,質(zhì)量分形維數(shù)、土壤顆粒比表面積是次要因素。

    Abstract:

    In order to research the distribution rule and influence factors of soil water repellency of rocky mountain area of northern China, the Guishui River Basin was taken as an example, the field investigation and lab analysis was carried out. Totally 385 soil samples of 9 different vegetation types were collected and the change rule between water drop penetration time (WDPT) with the factors of soil organic content, pH value, and mass fractal dimension and soil particle specific surface area was analyzed by the system. The research results showed that the order of soil water repellency degree was forest lands, shrubbery, open forest land, orchard, high coverage grassland, dryland, medium and low coverage grass land and beach land. The WDPT in northwest, northeast and southeast mountains of the basin was bigger, and in central basin was smaller in spatial distribution, meanwhile, the WDPT in soil surface was the most, intermediate was the second, and deep layers was the least in vertical direction. The WDPT had a positive correlation with the organic content, and it had an inverse correlation with pH value, mass fractal dimension and specific surface area. The pH value was the main influencing factor of WDPT for forest lands, shrubbery, orchard and high coverage grassland. The organic content was the major influence factor of WDPT for dryland, medium and low coverage grass land. For open forest land, the specific surface area was the principal influence factor of WDPT, and the mass fractal dimension was the major influence factor of WDPT for beach land.

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任長江,趙勇,龔家國,王建華,李海紅,顧金普.媯水河流域土壤斥水性分布與影響因素研究[J].農(nóng)業(yè)機械學報,2017,48(10):237-244. REN Changjiang, ZHAO Yong, GONG Jiaguo, WANG Jianhua, LI Haihong, GU Jinpu. Spatial Distribution and Effect Factors of Soil Water Repellency in Guishui River Basin[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(10):237-244.

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  • 收稿日期:2017-04-24
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  • 在線發(fā)布日期: 2017-10-10
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