雨强和坡度对红壤坡耕地有机碳迁移规律的影响
Effects of rainfall intensity and slope gradient on the migration of organic carbon in red soil sloping farmland
[目的]土壤侵蚀是土壤有机碳流失的主要驱动力,探究土壤侵蚀对土壤有机碳动态过程的作用机制,对于全球碳循环研究具有重要意义。针对微量可溶性有机碳损失可能引发碳氮生物地球化学循环的连锁反应,这一问题已引起广泛关注也需要深入研究。[方法]本文通过室内模拟降雨试验,以红壤坡地(10˚、15˚)翻耕种植的花生(幼苗期)为研究对象,设置不同雨强 60、90、120mm/h,研究土壤有机碳流失规律及影响因素。[结果]结果表明:(1)小坡度小雨强时壤中初始产流较…查看全部>>
[Objective]Soil erosion is the main driving force of soil organic carbon loss.Exploring the mechanism of soil erosion on the dynamic process of soil organic carbon is of great significance for the study of global carbon cycle.The loss of trace soluble organic carbon may lead to a chain reaction of carbon and nitrogen biogeochemical cycle,which has attracted wide attention and needs further study.[Method]In this paper,we designed the indoor simulated rainfall…查看全部>>
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