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季节性放牧对草地植物多样性与功能群特征的影响

刘玉, 刘振恒, 邓蕾, 武高林

刘玉, 刘振恒, 邓蕾, 武高林. 季节性放牧对草地植物多样性与功能群特征的影响[J]. 草业科学, 2016, 10(7): 1403-1409. DOI: 10.11829/j.issn.1001-0629.2016-0210
引用本文: 刘玉, 刘振恒, 邓蕾, 武高林. 季节性放牧对草地植物多样性与功能群特征的影响[J]. 草业科学, 2016, 10(7): 1403-1409. DOI: 10.11829/j.issn.1001-0629.2016-0210
Yu Liu, Zhen-heng Liu, Lei Deng, Gao-lin Wu. Species diversity and functional groups responses to different seasonal grazing in alpine grassland[J]. Pratacultural Science, 2016, 10(7): 1403-1409. DOI: 10.11829/j.issn.1001-0629.2016-0210
Citation: Yu Liu, Zhen-heng Liu, Lei Deng, Gao-lin Wu. Species diversity and functional groups responses to different seasonal grazing in alpine grassland[J]. Pratacultural Science, 2016, 10(7): 1403-1409. DOI: 10.11829/j.issn.1001-0629.2016-0210

季节性放牧对草地植物多样性与功能群特征的影响

基金项目: 

中国科学院&#x0201c

西部之光&#x0201d

项目(XAB2015A04)

中国科学院青年创新促进会项目(2011288)

陕西省科技计划项目(2014KJXX-15)

摘要: 针对放牧对高寒草地生态系统的影响,通过比较暖季放牧(6月-10月)和冷季放牧(11月-翌年5月)下典型高寒草地物种多样性和功能群特征的变化,分析了高寒草地植物群落对季节性放牧的响应机制。结果表明,暖季放牧草地中物种多样性指数为1.92,均匀度指数为0.78,明显高于冷季放牧草地的1.81和0.74,而冷季放牧草地的丰富度指数为17.45,高于暖季放牧草地的16.45。冷季放牧草地的地上生物量为246.61 g·m-2,莎草类和豆科类功能群的生物量比例分别为66.85%和15.86%,其值均高于暖季放牧草地。暖季放牧草地植物总密度为2 064株·m-2,明显高于冷季放牧草地的1 394株·m-2。合理的放牧强度下,暖季放牧相比冷季放牧有利于草地群落物种多样性和均匀度的维持,但冷季放牧草地有利于草地群落地上生物量的积累。

 

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  • 收稿日期:  2016-04-20
  • 发布日期:  2016-07-19

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