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1. 氮添加对地上生物量(A), 溶解性无机氮含量(B), 土壤pH (C)和微生物生物量碳含量(D)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. 1. Effects of nitrogen (N) addition on aboveground biomass (AGB)(A), dissolved inorganic nitrogen (DIN) content (B), soil pH (C) and microbial biomass carbon (MBC) content (D)(mean ± SE). F and p are the results of one-way ANOVA. Different lowercase letters indicate significant difference among N addition levels (p < 0.05).
