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Soil quality change during reversal of desertification in agro-pastoral transition zone of northern China

机译：中国农业田园过渡区荒漠化逆转土壤质量变化

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Based on the field surveys and laboratory analysis, soil physical, chemical and biological properties were studied at different degree of the reversal of desertification in the agro-pastoral transition zone of northern China. The results showed the dominant soil particle size changed from coarse-fine sand to a combination of very fine sand and silt + clay, and corresponding levels of each soil nutrient increased. The content of coarse sand was significantly and negatively correlated with soil nutrient contents, whereas nutrient contents were significantly and positively correlated with the contents of fine sand and silt + clay. The changes in soil nutrient contents and their availability were strongly controlled by the changes in the soil particle size distribution, with increased fineness of soil texture accompanied by an enrichment of soil nutrients. Soil quality increased with the increase of the restoration year. The results of this study provide support for the belief that artificial restoration and reforestation in areas with severe desertification can improve soil quality.
机译：基于现场调查和实验室分析，研究了土壤物理，化学和生物学特性，在中国北方农业田园过渡带的荒漠化逆转。结果表明，主要的土壤粒度从粗细砂变为非常细小的沙子和淤泥+粘土的组合，并且每种土壤营养素的相应水平增加。粗砂的含量显着且与土壤养分含量呈负相关，而营养物质显着且与细砂和淤泥+粘土的含量呈正相关。土壤养分内容物的变化和其可用性受到土壤粒度分布的变化强烈控制，伴随着土壤养分的富集，伴随着土壤纹理的细度。土壤质量随着恢复年度的增加而增加。本研究的结果为信念提供了支持，即严重荒漠化地区的人工恢复和重新造林可以提高土壤质量。

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