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Effects of Land Use on Soil Quality in a Small Watershed of the Loess Hilly and Gully Region

机译:黄土丘陵沟壑区小流域土地利用对土壤质量的影响。

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摘要

Land use and management practices greatly impact the direction and degree of soil quality change in time and space. However, the difference among land use might result from soil quality level. Our objective was to discuss the effects of land use on soil quality at small watershed-scale. 156 soil samples representing five land uses were studied in Zhifanggou watershed of loess hilly and gully region. The soil quality levels and the degradation extent were evaluated by means of the soil quality index (SQI) and soil degradation index (SDI). The results showed that the integrated indicator of soil quality indexes for average of two soil layers were forestland (0.382) shrub land (0.368)> farming-withdrawn grassland (0.332) natural grassland (0.325)> cropland (0.311) for ridge, forestland (0.426)>natural grassland (0.422)> cropland (0.345) of gully slope land and forestland (0.415)> cropland (0.363) in gully bottom Iand. Soil quality of forestland, shrub land and grassland were better than that of cropland in the small watershed. 7 simple soil quality indicators screened out by factor analysis well reflected the information of 20 soil integrate assessment (r2=0.9089). There was a strong correlation between SQl and SDl in soil quality evaluation.
机译:土地使用和管理实践极大地影响了土壤质量随时间和空间变化的方向和程度。但是,土地利用之间的差异可能是由于土壤质量水平造成的。我们的目的是讨论小流域尺度上土地利用对土壤质量的影响。在黄土丘陵沟壑区纸坊沟流域研究了代表5种土地利用的156个土壤样品。通过土壤质量指数(SQI)和土壤退化指数(SDI)评估土壤质量水平和退化程度。结果表明,两层土壤平均质量指标的综合指标为林地(0.382),灌木林地(0.368)>退耕草地(0.332),天然草地(0.325)>山脊,林地(0.311)。 0.426)>天然草地(0.422)>沟谷坡地的农田(0.345)和林地(0.415)>沟谷底的农田(0.363)。在小流域,林地,灌木林地和草地的土壤质量优于农田。通过因子分析筛选出的7个简单的土壤质量指标很好地反映了20个土壤综合评价的信息(r2 = 0.9089)。在土壤质量评估中,SQ1和SD1之间有很强的相关性。

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