呼伦贝尔退化草原土壤养分调控的原理与技术

刘伟, 郝毅晴, 孙佳美, 王璟, 范冰, 郝建玺, 金那申, 潘庆民

Theory and application of soil nutrient regulation for degraded steppe in Hulun Buir, China

LIU Wei, HAO Yi-Qing, SUN Jia-Mei, WANG Jing, FAN Bing, HAO Jian-Xi, JIN Na-Shen, PAN Qing-Min

图6 不同养分添加处理下呼伦贝尔草原地上生物量(A)、羊草地上生物量比例(B)和物种丰富度(C)的变化(平均值±标准误, n = 5)。CK、N1P1、N2P2、N3P3、N4P4、N5P5分别表示对照、添加4.8 g N·m^-2 + 1.5 g P·m^-2、7.2 g N·m^-2 + 2.25 g P·m^-2、9.6 g N·m^-2 + 3.0 g P·m^-2、12.0 g N·m^-2 + 3.75 g P·m^-2、14.4 g N·m^-2 + 4.5 g P·m^-2; N, 氮; P, 磷。不同小写字母代表不同处理间差异显著(p < 0.05); ns, p > 0.05。

Fig. 6 Aboveground biomass (A), biomass proportion of Leymus chinensis (B) and species richness (C) under different nutrient addition treatments in Hulun Buir steppe (mean ± SE, n = 5). CK, N1P1, N2P2, N3P3, N4P4, N5P5 stand for no addition, addition of 4.8 g N·m^-2 + 1.5 g P·m^-2, 7.2 g N·m^-2 + 2.25 g P·m^-2, 9.6 g N·m^-2 + 3.0 g P·m^-2, 12.0 g N·m^-2 + 3.75 g P·m^-2, 14.4 g N·m^-2 + 4.5 g P·m^-2, respectively; N, nitrogen; P, phosphorus. Different lowercase letters indicate significant differences (p < 0.05); ns, p > 0.05.