草地土壤有机质不同组分氮库对长期氮添加的响应
武运涛1,2, 杨森1,2, 王欣1, 黄俊胜1, 王斌1,2, 刘卫星1, 刘玲莉1,2,*(
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Responses of soil nitrogen in different soil organic matter fractions to long-term nitrogen addition in a semi-arid grassland
WU Yun-Tao1,2, YANG Sen1,2, WANG Xin1, HUANG Jun-Sheng1, WANG Bin1,2, LIU Wei-Xing1, LIU Ling-Li1,2,*()
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图2. 氮添加对土壤黏粒与粉粒含量(A)和砂粒含量(B)的影响(平均值±标准误)。F和p为方差分析的结果, 不同小写字母表示不同氮添加水平间存在显著差异(p < 0.05)。
Fig. 2. Effects of nitrogen (N) addition on soil clay and silt (A) and sand (B) content (mean ± SE). F and p are the results of one-way ANOVA. Different lowercase letters indicate significant difference (p < 0.05) among different N addition levels.
