摘要
以典型高寒草甸为研究对象,分析了原生植被、轻度、中度、重度和黑土滩退化草地生物量和土壤养分的变化.结果表明:原生植被的草丛高度、物种数、牧草鲜重、优良牧草鲜重和地下生物量均最大,分别为4.08cm、16.33种·m-2、369.60g·m-2、60.53g·m-2和 10.07g·m-2,显著高于黑土滩样地(P≤0.05).原生植被的土壤全氮和土壤有机质为6.55g·kg-1和140.98g·kg-1,显著高于其他处理(P≤0.05).生物量与土壤有机质、土壤全氮呈显著正相关(P≤0.05).
Abstract
The paper analysised the changes of alpine meadow biomasses and soil nutrients about non-degraede meadow,lightly degraded meadow,moderately degraed meadow,severely degraded meadow and black soil land.The resluts showed the plant height,species,fresh weight,dominated plant fresh weight and below ground biomass were 4.08 cm,16.33 species/m2,369.60 g/m2,60.53 g/m2 and 10.07 g/m2,which were themaximum values and significantly higher than other treatments(P≤0.05).Biomass had significantly correlation with the soil organic matter and soil nitrogen(P≤ 0.05).
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