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以贵州省普定县石漠化治理示范基地为例,根据研究区地形地貌特征,通过在坡顶、坡腰、坡脚取样进行室内实验分析,分析不同坡位土壤有机质含量、全氮、全磷、全钾、碱解氮、速效磷、速效钾变化。结果显示与前人研究规律有所差异,土壤养分没有随坡顶、坡腰、坡脚坡度的降低而逐渐增加,这是由于土壤养分的变化不仅取决于自然因素,并且受人为因素影响,总体上本研究土壤中养分含量为坡腰>坡顶>坡脚,各坡位各采样深度变化趋势基本相同,但土壤全钾、全磷、速效钾、速效磷受土壤成土母质影响,与其它养分指标变化有所差异。
Taking the Demonstration Base of Rock Desertification Control in Puding County of Guizhou Province as an example, according to the topographic and geomorphological features in the study area, laboratory experiments were conducted to analyze the soil organic matter content, total nitrogen and total Phosphorus, total potassium, alkaline hydrolysis nitrogen, available phosphorus, available potassium changes. The results showed that there were some differences with the previous research methods. Soil nutrients did not increase with the decrease of slope tops, sloping slopes and slope slopes. This is because soil nutrient changes not only depend on natural factors but also influenced by human factors. In this study, the nutrient contents of soil in the study ranged from hillside> top> hillside. The trend of sampling depth in each slope was basically the same. However, the total potassium, total phosphorus, available potassium and available phosphorus were affected by soil parent material, Changes in nutrient indicators vary.