20 g / m 2 或 32 g / m 2 时生物量最高。 2) 土壤全量养分和速效养分在施肥量为 20 g / m 2 或 32 g / m 2 时较高,施肥量增加 到 40 g / m 2 时土壤资源逐渐降低。 3) 不同施肥梯度矮嵩草草甸土壤有机碳和微生物生物量碳在 0-10 cm 土层明显较高,且随 着施肥量的增加,分布在 0-40 cm 土层的土壤有机碳含量呈单峰曲线变化。 施肥 20 g / m 2 或 32 g / m 2 时土壤有机碳和微生物 量碳含量最高。 4) 30 g / m 2 施肥量可作为高寒草甸最佳施氮水平。 施肥梯度下土壤有机碳和微生物量碳含量可作为衡量土壤 肥力和土壤质量变化的重要指标。 高施肥量(逸40 g / m 2
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