| 贝加尔针茅＋线叶菊草地退化系列的定量划分和动态模型的建立 |
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| 引用本文： | 郑淑华,蔡瑞磊,赵萌莉,韩国栋,王堃.贝加尔针茅＋线叶菊草地退化系列的定量划分和动态模型的建立[J].干旱区研究,2008,25(6). |
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| 作者姓名： | 郑淑华 蔡瑞磊 赵萌莉 韩国栋 王堃 |
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| 作者单位： | 中国农业大学动物科技学院，德州富达玻璃钢制品有限公司，内蒙古农业大学生态环境学院 |
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| 基金项目： | 内蒙古科学技术攻关项目，国家自然科学基金重点项目，内蒙古自然基金 |
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| 摘 要： | 对贝加尔针茅(Stipa baicalensis) 线叶菊(Filifolium sibiricum)草地中贝加尔针茅、麻花头(Serratula centauroides)、日荫菅(Carex pediformis)和菊叶委陵菜(Potentilla tanacetifolia)4种主要植物的盖度、频度和植被指数进行了分析.结果表明: ①通过SPSS的聚类分析,实验区草地可以划分为3个草地退化系列,即轻度退化、中度退化、重度退化;②随草地退化程度的增强,贝加尔针茅的盖度、频度和指数表现出降低的趋势,麻花头与日荫菅的盖度、频度和植被指数表现出先增加后降低的趋势,而菊叶委陵菜盖度、频度和植被指数则表现出增加的趋势;③轻度退化、中度退化、重度退化3个不同退化系列的草地变化可通过 Y1=0.020 5X1 0.003 9X2 - 0.003 2X3 0.003 9X4 - 47.245 6;Y2=0.005 4X1 0.005 2X2-0.003 4X3 0.011 9X4-16.734 1;Y3=0.002 2X1 0.003 5X2-0.001 6X3 0.004 6X4-3.854 8(其中,Y表示最终的变化值,X1,X2,X3,X4分别表示草地最优状态时贝加尔针茅、麻花头、日荫菅和菊叶委陵菜4种植物的指数)来反映.
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| 关 键 词： | 贝加尔针茅 线叶菊 草地退化 退化系列 退化阶段 动态模型 内蒙古 |
Quantitative Classification of Degenerated Series of Stipa baicalensis+Filifolium sibiricum Steppe and Development of Dynamic Model |
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| ZHENG Shu-hua,CAI Rui-lei,ZHAO Meng-li,HAN Guo-dong,WANG Kun.Quantitative Classification of Degenerated Series of Stipa baicalensis+Filifolium sibiricum Steppe and Development of Dynamic Model[J].Arid Zone Research,2008,25(6). |
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| Authors: | ZHENG Shu-hua CAI Rui-lei ZHAO Meng-li HAN Guo-dong WANG Kun |
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| Institution: | ZHENG Shu-hua1,CAI Rui-lei2,ZHAO Meng-li3,HAN Guo-dong3,WANG Kun1 |
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| Abstract: | In this paper,the coverage,frequency and index of 4 main plant species,i.e.,Stipa baicalensis,Serratula centauroides,Carex pediformisand Potentilla tenacetifoliain Stipa baicalensis Filifolium sibiricum steppes are analyzed.The results are as follows:(1) After carrying out the clustering analysis in SPSS method,the degeneration of steppes in the study area can be divided into 3 stages,i.e.slight degeneration stage,moderate degeneration stage and serious degeneration stage;(2) With the development of steppe degeneration,the coverage,frequency and index of Stipa baicalensisare decreased,that of Serratula centauroidesand Carex pediformare increased at first and then decreased,that of Potentilla tenacetifoliaare increased;(3) The change of steppes at the different degeneration stages can be expressed by: Y1 = 0.020 5X1 0.003 9X2-0.003 2X3 0.003 9X4-47.245 6(slight degeneration stage);Y2 = 0.005 4X1 0.005 2X2-0.003 4X3 0.0119X4-16.734 1(moderate degeneration stage);and Y3 = 0.002 2X1 0.003 5X2-0.001 6X3 0.004 6X4-3.854 8(serious degeneration stage),respectively.Where,Y is the final change value,and X1,X2,X3and X4are the indexes of Stipa baicalensis,Serratula centauroides,Carex pediformisand Potentilla tenacetifoliarespectively. |
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| Keywords: | degradation series degradation stage dynamic model |
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