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5 不同养分添加时期对呼伦贝尔草原地上生物量(A)、羊草地上生物量(B)和羊草密度(C)的影响(平均值±标准误, n = 6)。对照为不施肥处理, 4月和7月表示施肥时间。氮磷添加量分别为10和3 g·m-2。不同小写字母代表不同处理间差异显著(p < 0.05)。

Fig. 5 Aboveground biomass of all species (A), Leymus chinensis (B) and the density of Leymus chinensis (C) under different timing of nutrient addition in Hulun Buir steppe (mean ± SE, n = 6). CK stands for no fertilization. April and July stand for fertilization time. Nutrient additions are 10 and 3 g·m-2, respectively. Different lowercase letters indicate significant differences among different treatments (p < 0.05).