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为探讨不同退耕模式对喀斯特峰丛洼地土壤碳氮特征的影响,选取广西环江典型退耕类型样地进行有机碳、全氮特征研究,结果表明:不同退耕类型之间的土壤有机碳、全氮差异显著;各退耕类型土壤有机碳和全氮都表现出随土层加深而逐渐降低趋势;土壤有机碳和全氮线性拟合呈显著正相关.表明退耕还林(草)显著提高了土壤有机碳、氮,但在植被类型和人为活动的影响下土壤碳氮特征差异明显.
In order to explore the effect of different models of returning farmland on the soil carbon and nitrogen characteristics in the cluster craters in karst areas, the characteristics of organic carbon and total nitrogen in typical types of returning farmland in the Huanjiang River in Guangxi were studied. The results showed that the soil organic carbon and total nitrogen The differences of soil organic carbon and total nitrogen in different types of cropland tended to decrease with the deepening of the soil layer. There was a significant positive correlation between the soil organic carbon and the total nitrogen linear regression, which indicated that the conversion of cropland to forest (grass) Carbon and nitrogen, but the difference of soil carbon and nitrogen was obvious under the influence of vegetation types and man-made activities.