四种典型类型高寒草甸植被生物量变化  

BIOMASS CHANGES OF FOUR TYPICAL TYPES OF ALPINE GRASS

作　　者：党永桂 DANG Yong—gui(Qinghai Haibei Tibetan Autonomous Prefecture Grassland Station,Xihai Qinghai 810299,China)

机构地区：[1]青海省海北藏族自治州草原站,青海西海810299

出　　处：《青海草业》2021年第2期11-13,共3页Qinghai Prataculture

摘　　要：采用样方法分析了高山嵩草(Kobresia pygmaea)草甸、藏嵩草(Kobresia tibetica)草甸、线叶嵩草(Kobresia capillifolia)草甸和高山嵩草—异针茅(Stipa aliena)草甸形态指标和生物量的变化,结果表明:藏嵩草草甸的株高为最大值(14.33cm),高山嵩草—异针茅类型草甸物种数则是最大值,高山嵩草—异针茅草甸牧草鲜重、可食牧草鲜重,牧草干重和可食牧草干重分别为4 098.33 g/m^(2)、3 681.67 g/m^(2)、1 335 g/m^(2)和1 205 g/m^(2),与高山嵩草草甸不呈显著差异,而显著高于藏嵩草和线叶嵩草草甸。物种数、毒杂草种数和牧草鲜重、可食牧草鲜重、牧草干重和可食牧草干重呈显著正相关(P≤0.01)。The changes of morphological indexes and biomass of Kobresia pygmaea,Kobresia tibetica Kobresia capillifolia and Stipa aliena.As a result,the maximum plant height of Kobresia tibetica was(14.33 cm),The species number of Stipa aliena is the maximum,Stipa aliena forage fresh weight,edible forage fresh weight,The dry weight of forage and edible forage were 4098.33 g/m^(2)、3681.67 g/m^(2)、1335 g/m^(2)and 1205 g/m^(2),respectively There was no significant difference with Kobresia pygmaea,It was significantly higher than that of Kobresia capillifolia species number,toxic weed species number and forage fresh weight,edible forage fresh weight,forage dry weight and edible forage dry weight showed significant positive correlation(P≤0.01).

关 键 词：高寒草甸 生物量 嵩草草甸 

分 类 号：S812[农业科学—草业科学]