云南2种主要灌丛土壤有机碳分布特征及其影响因子研究

发布时间：2018-06-04 23:51

本文选题：南烛 + 矮杨梅　；参考：《西南林业大学学报(自然科学)》2017年05期

【摘要】：以云南省的优势灌丛土壤为研究对象,利用优势灌丛余甘子灌丛和南烛、矮杨梅灌丛共计31个样点进行采样,分析云南省优势灌丛土壤有机碳含量特征及其影响因素。结果表明:余甘子灌丛土壤有机碳含量空间分布自东南向西北减少,南烛、矮杨梅灌丛土壤有机含量自中部向四周逐渐减少;余甘子灌丛土壤有机碳含量均值为0.32~0.96 g/kg,南烛、矮杨梅灌丛土壤有机碳含量均值为0.71~0.85 g/kg,余甘子灌丛各土层有机碳含量差异显著,有机碳含量由表层向下递减,南烛、矮杨梅灌丛各土层有机碳含量差异不显著;余甘子灌丛土壤机碳含量与海拔和凋落物生物量呈负相关,与灌丛盖度和有机氮含量呈正相关,海拔为主要影响因素;南烛、矮杨梅灌丛土壤有机碳含量和海拔呈负相关,与凋落物生物量,灌木层盖度,有机氮含量呈正相关,凋落物生物量是主要影响因素。
[Abstract]:Taking the dominant shrub soil in Yunnan as the research object, the soil organic carbon content and its influencing factors in the dominant shrubs in Yunnan province were analyzed with 31 samples from the dominant shrubs shrubs and South candle shrubs. The results showed that the spatial distribution of carbon content in the soil of the shrubs of Yunnan province decreased from the southeast to the northwest. The organic content of soil organic carbon in the shrubs of dwarf red bayberry shrubs gradually decreased from the middle to four weeks. The mean value of organic carbon in the soil of the shrubs was 0.32~0.96 g/kg, and the mean value of organic carbon content of soil organic carbon was 0.71~0.85 g/kg, and the content of organic carbon in the soil layers of the shrubby shrubs was significantly different, and the content of organic carbon decreased from the surface to the lower, the South candle and the dwarf poplar. There is no significant difference in the organic carbon content in the soil layers of the plum shrubs; the carbon content of the soil machine in the shrubs is negatively related to the altitude and the litter biomass, and is positively related to the shrub coverage and the organic nitrogen content, and the elevation is the main factor; the organic carbon content of the South candle, the soil organic carbon content is negatively correlated with the altitude, and the litter biomass and the shrub layer cover. There was a positive correlation between organic nitrogen content and litter biomass.
【作者单位】：西南林业大学生态旅游学院;中国科学院成都生物研究所;
【基金】：国家自然科学基金(31560189)资助
【分类号】：S714.2

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