| 那拉提两种利用方式草地植物群落种-面积曲线拟合及最小面积确定的研究 |
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| 引用本文： | 卓茜,李熙萌,杨骁,冯金朝.那拉提两种利用方式草地植物群落种-面积曲线拟合及最小面积确定的研究[J].安徽农业科学,2013,41(10):4242-4245. |
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| 作者姓名： | 卓茜 李熙萌 杨骁 冯金朝 |
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| 作者单位： | 中央民族大学生命与环境科学学院,北京,100081;中央民族大学经济学院,北京,100081 |
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| 基金项目： | 中央民族大学"985工程"项目，"111计划"项目 |
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| 摘 要： | 采用12个曲线方程拟合出的群落种-面积曲线,对那拉提围栏+打草与自由放牧种利用方式草地的最小面积进行研究,以复相关系数(R2值)及模型的生物学意义作为评价指标,得出最优拟合模型为累积韦伯分布模型。同时,通过比较群落总种数比例法与二阶导数法这2种确定最小面积的方法,发现采用二阶导数法求得的最小面积较符合实际情况,采用群落总种数比例法求出的最小面积偏小。采用二阶导数法求得的围栏+打草、自由放牧两样地的最小面积分别为3.4、5.6 m2。
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| 关 键 词： | 草地 植物群落 种-面积曲线 拟合 最小面积 |
Fitting of Species-area Relationship and Determination of Minimum Sampling Area for TwoUtilization Ways of Plant Communities in Nalati Pasture |
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| Institution: | ZHUO Qian et al(College of Life and Environmental Sciences,Minzu University of China,Beijing 100081) |
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| Abstract: | Adopting 12 equations to fit community species-area relationships,the minimum sampling areas(MSA) of natural grasslands under enclosure condition(plot 1) and grazing condition(plot 2) in Nalati pasture was studied.According to the multiple correlation coefficient(R2) and the biological significance of model,the cumulative Weibull distribution model was regarded as the optimal fitting model for Nalati pasture.Through comparing the community species proportion method and the second derivative method,it was found that the latter method is more accurate and the minimum sample areas got by the former method is lower than reality.Finally,the MSA of plot 1 and plot 2 are 3.4 m2,5.6 m2. |
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| Keywords: | Grassland Plant community Species-area curve Fitting minimum sampling areas |
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