对黄河源区玛多县草地退化的自然和人为因素作了深入分析。
Natural and artificial factors of grassland degradation in Maduo County in source region of Yellow River were analyzed in this paper.
由于自然和人为因素的共同作用，黑土的质量发生了严重的退化，数量也急剧减少。
Because of complicated function of natural and artificial factors, the quality and quantity of black soil decreased and degenerated heavily.
受自然和人为因素的影响，土壤特性在空间分布上呈现非均一性，即土壤特性的空间变异性。
Affected by the nature and human factors, soil property is non - homogeneous in the spatial distribution, that is spatial variability of soil property.
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