【摘要】 就祁连山草原生态系统土壤氮在不同时期、不同放牧强度条件及不同土层深度条件下空间分布进行了试验研究,运用回归分析及方差显著性检验对土壤全氮含量进行了分析,结果发现3种不同放牧条件下,祁连山草地土壤氮的变化量差异显著;同时发现不同土层深度和土壤容积质量与土壤全氮量之间存在很好的线性相关关系,从而指出合理放牧会全面提高土壤质量。更多还原

【Abstract】 This paper studied the spatial variation of soil nitrogen in pasture ecosystem of Qilian Mountains under different period, different grazing intensity and different soil layers. The multivariate linear regression analysis and analysis of variance (ANOVA) methods are employed to analyze the status of soil nitrogen content. The result showed that the soil nitrogen content varied significantly under different grazing condition. Also indicated that there exist the better linear relationship of soil nitrogen with bulk density of soil and soil depth, and point out the reasonable grazing would completely increase the soil quality.更多还原