Study on influences of different land use types on soil qualities in plateau karst depression | 不同土地利用方式对高原喀斯特洼地土壤主要特性的影响
2010
Zhang Xi, Guizhou Provincial Academy of Forestry, Guiyang（China） | Lian Bin, Chinese Academy of Sciences, Guiyang（China）, Institute of Geochemistry | Yin Jie, Guizhou Provincial Academy of Forestry, Guiyang（China）
[Objective] The aim was to study influences of different land use ways on soil qualities in plateau karst depression. [Method] Different land use types were divided by topographic map of 1:10 000 scales and soil properties of physics and chemistry were analyzed. [Result] The results showed that the variation trend of soil depth (A+B stratum) was slope plough (include returning farm to forest) land ＞natural forest land＞planted forest land＞shrub forest land, and relative indexes changing regularities of soil sections, soil water conservation, soil particle composition, soil fertility and soil fertility effectives in different land use types were studied. Change trend of soil synthetic quality was cultivated land＞returning farm to forest land＞slope plough land, natural forest land＞planted forest land. High soil synthetic quality of cultivated land was result of natural soil-forming and human managing processes, soil synthetic quality of returning farm to forest land in 3-5 year was higher than that of slope plough land indicated a effective method to improve slope plough soil quality in karst depression, and soil synthetic quality of natural forest land was higher than that of planted forest land provided an evidence to use near-nature manage technology to improve soil quality in karst depression. [Conclusion] The study will provide theoretical basis for bioremediation of rocky desertification and biological control technology of soil quality evolution.
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