鲁中山区小流域坡面侵蚀土壤养分空间分异特征研究
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国家“948”项目(2011-G30),山东省中青年科学家奖励基金项目(BS2009NY025)和“十二五”国家科技支撑计划项目(2011BAD11B01;2011BAD11B02)资助


Spatial variability characteristics of slope soil nutrients in small watershed of the middle of Shandong Province
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    摘要:

    采用野外采样、室内分析的方法,以鲁中山区九仙山小流域3个自然坡面(阳坡、东坡和西坡)为研究对象,探讨了小流域坡面侵蚀条件下土壤养分的空间分布特征。结果表明,3个坡面有机质含量呈现出顺坡距离小于20 m时,有机质含量按照东坡>西坡>阳坡的顺序递减,顺坡距离大于30 m时,有机质含量按照西坡>阳坡>东坡的顺序递减;沿顺坡方向,3个坡面不同坡位土壤有机质、碱解N、速效P、速效K含量存在差异,总体趋势是坡面中上部土壤有机质和速效养分含量偏低,在坡底部养分相对富集;东坡和西坡剖面不同层次土壤有机质、碱解N、速效P、速效K含量随着土壤深度的增加而降低,其中有机质在0 ~ 20 cm平均含量约为8 g/kg,在80 ~ 100 cm处约为2 g/kg,碱解N在0 ~ 20 cm平均含量为50 mg/kg,在 80 ~ 100 cm 处为20 mg/kg。

    Abstract:

    In this study, we took three natural slopes (Sunny slope, East slope and West slope) in a small watershed of Shandong Province to explore the spatial variability characteristics of soil nutrients. The results showed that organic matter content was in a trend of East slope> West slope > Sunny slope when the distance was less than 20 m along the slope direction but in a trend of West slope > Sunny slope > East slope when the distance was more than 30 m. Along the slope direction, soil organic matter and available N, P and K contents of the three slopes were different, and were in a general trend of lower in the upper and higher in the bottom of the slopes. Soil organic matter and available N, P and K contents of East slope and West slope decreased as the depth increased. The average content of organic matter was about 8 g/kg at 0-20 cm and about 2 g/kg at 80-100 cm and available N content was 50 mg/kg at 0-20 cm and 20 mg/kg at 80-100 cm.

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王艳华,董元杰,张 民,邱现奎,胡国庆.鲁中山区小流域坡面侵蚀土壤养分空间分异特征研究[J].土壤,2011,43(2):179-183. WANG Yan-hua, DONG Yuan-jie, ZHANG Min, QIU Xian-kui, HU Guo-qing. Spatial variability characteristics of slope soil nutrients in small watershed of the middle of Shandong Province[J]. Soils,2011,43(2):179-183

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