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以滇西北碧塔海泥炭沼泽土壤为研究对象,通过野外测量和室内分析相结合的方法,研究牦牛(Bos mutus)践踏和牦牛粪影响下的土壤总有机碳含量、全氮含量和N_2O排放通量。结果表明,牦牛践踏显著抑制了土壤N_2O的排放;牦牛粪的输入促进了土壤N_2O的排放,且牦牛粪分解前期是N_2O排放的高峰期。在0~30 cm深度土层内,牦牛放牧使土壤总有机碳含量增加,牦牛践踏和牦牛粪都促进了土壤总有机碳含量的增加,增加比例分别为39.27%和12.19%;随着土壤深度的增加,粪斑样方土壤总有机碳含量显著减小,践踏样方土壤总有机碳含量略有增加。牦牛放牧使土壤全氮含量增加,牦牛践踏和牦牛粪都促进了土壤全氮含量的增加,增加比例分别为50.56%和12.76%;随着土壤深度的增加,践踏样方和粪斑样方土壤全氮含量都在减小。
Taking Bitahai peat swamp soil in northwestern Yunnan as the research object, the soil total organic carbon (TOC), total nitrogen (N 2 O) and total nitrogen (N 2 O) emissions were studied under the influence of yak (Bos mutus) the amount. The results showed that the yak trampling significantly inhibited the soil N 2 O emission; the input of yak dung promoted the soil N 2 O emission, and the yak dung decomposition was the peak of N 2 O emission. In 0 ~ 30 cm soil depth, yak grazing increased soil total organic carbon content, yak trampling and yak dung promoted the increase of soil total organic carbon content, with the increase rates of 39.27% and 12.19%, respectively. With the depth of soil , Total soil organic carbon content of the stubborn quadrats significantly decreased, and total soil organic carbon content of trampling quadrats slightly increased. The total nitrogen content of soil increased with yak grazing, while the yak trampling and yak dung promoted the increase of soil total nitrogen, with the increase proportion being 50.56% and 12.76% respectively. With the increase of soil depth, Total nitrogen content is decreasing.