| 青海湖地区线叶嵩草型中度与重度退化草地群落的比较研究 |
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| 引用本文： | 王小利,张力,张德罡,干友民,杨予海,苗小林,周学辉,邓春辉,官却扎西. 青海湖地区线叶嵩草型中度与重度退化草地群落的比较研究[J]. 草业科学, 2006, 23(10): 8-13 |
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| 作者姓名： | 王小利 张力 张德罡 干友民 杨予海 苗小林 周学辉 邓春辉 官却扎西 |
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| 作者单位： | 贵州草业研究所,贵州,独山,558200;兰州畜牧与兽药研究所,甘肃,兰州,730050;甘肃农业大学草业学院,甘肃,兰州,730070;四川农业大学,四川,雅安,625014;青海省三角城种羊场,青海,刚察,812300 |
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| 基金项目： | 中国农业科学院兰州畜牧与兽药研究所课题，青藏高原生态畜牧业试验与示范项目 |
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| 摘 要： | 通过对青海湖地区线叶嵩草型中度与重度退化草地群落的比较研究,结果表明,在中度到重度退化进程中,随着退化程度的加重,草地植物群落的盖度、物种数、多样性及均匀度指数均下降,中度与重度退化样地地上植物类群及总植物量季节动态均呈现明显的“单峰”曲线,其峰值同时出现在8月下旬,在植物生长季,主要植物类群地上植物量季节动态具有明显的差异。地上总植物量季节积累动态均可用曲线y=ea bx(生长曲线)很好拟合。中度退化样地的净初级生产力高于重度退化样地,但由于在牧草返青期放牧使中度退化样地禾草类在草群中所占的比例小于重度退化样地。
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| 关 键 词： | 青海湖地区 线叶嵩草 退化 群落 |
| 文章编号： | 1001-0629（2006）10-0008-06 |
| 收稿时间： | 2005-12-02 |
| 修稿时间： | 2005-12-02 |
Study on comparison of moderate and heavy degraded community of Kobresia capillifolia grassland around Qinghai Lake area |
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| WANG Xiao-li,ZHANG Li,ZHANG De-gang,GAN You-min,YANG Yu-hai,MIAO Xiao-lin,ZHOU Xue-hui,DENG Chun-hui,GUAN QUE Zha-xi. Study on comparison of moderate and heavy degraded community of Kobresia capillifolia grassland around Qinghai Lake area[J]. Pratacultural Science, 2006, 23(10): 8-13 |
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| Authors: | WANG Xiao-li ZHANG Li ZHANG De-gang GAN You-min YANG Yu-hai MIAO Xiao-lin ZHOU Xue-hui DENG Chun-hui GUAN QUE Zha-xi |
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| Affiliation: | 1. Guizhou Grassland Science Research Institute,Dushan 558200;2. I.anzhou Institute of Animal Husbandry and Veterinary Pharmaceutical Science, CAAS, Lanzhou 730050 ; 3. Gansu Agricultural University, Lanzhou 730070 ; 4. Sichuan Agricultural University, yaan 625014; 5. Sanjiao City Sheep Breeding Farm, Qinghai,Gangcha 812300 |
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| Abstract: | Moderate and heavy degraded communities of Kobresia capillifolia grassland in Qinghai Lake area were compared in this paper.The result showed that the coverage,the number of species,the species diversity and evenness index of plant community decreased with the aggravation of degradation.Seasonal dynamic of aboveground populations and total biomass of two degraded plots take on single apex curve,the value of apex appeared in the last ten days of August.Significant difference was observed in total aboveground biomass between two degraded plots.The accumulation dynamics of aboveground biomass could be simulated by the equation y=e~(a bx).The net production of aboveground biomass of moderate-degraded plot was higher than that of heavy-degraded plot.The percentage of grasses in moderate degraded plot was lower than heavy-degraded plot because of grazing in early spring. |
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| Keywords: | Qinghai Lake area Kobresia capillifolia degradation community |
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