| 不同放牧强度下天然沙质草场植物群落分异特征及沙漠化发生机理试验研究 |
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| 引用本文： | 徐斌,赵哈林,刘新民,根本正之,大黑俊哉.不同放牧强度下天然沙质草场植物群落分异特征及沙漠化发生机理试验研究[J].兰州大学学报(自然科学版),1994(4). |
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| 作者姓名： | 徐斌 赵哈林 刘新民 根本正之 大黑俊哉 |
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| 作者单位： | 中国科学院兰州沙漠研究所，日本农林水产省农业环境技术研究所，兰州大学生物系 |
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| 基金项目： | 中国－日本沙漠化机理合作研究课题 |
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| 摘 要： | 本文通过在科尔沁沙地沙质天然草场进行连续牧压梯度试验，主要得出如下结论：随着放牧强度的增加，植被盖度，地下生物量迅速下降，连续强度牧压下沙漠化在短期内（３～７个月）强烈发展；随着牧压的增加，地下生物量与地上生物量的比值呈上升趋势，土壤含水量也上升；放牧造成的沙漠化在初期阶段相对容易治理。
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| 关 键 词： | 放牧试验，放牧强度，沙漠化，植物群落分异 |
An Experimental Study on the Differential Characteristics of Plant Communities under the Different Grazing Gradation and the Mechanism of Desertification in the Natural Sanddy Rangland |
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| Xu Bin,Zhao Halin, Liu Xinmin.An Experimental Study on the Differential Characteristics of Plant Communities under the Different Grazing Gradation and the Mechanism of Desertification in the Natural Sanddy Rangland[J].Journal of Lanzhou University(Natural Science),1994(4). |
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| Authors: | Xu Bin Zhao Halin Liu Xinmin |
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| Abstract: | The experiment on the effects of different grazing gradations on plant communities has been conducted in the natural rangeland in the Horqin Sandy Land. The results showed that (1) With the increase in grazing pressure, the plant coverage end the belowground phytomass decreased quickly, the ratio of below-to-above-ground phytomass increased, and the soil moisture increased; and (2) desertification developed severely in a shorter period (3-7months) under continuous heavy grazing, but the desertification caused by grazing in its initial stage was relatively easier to be reversed. |
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| Keywords: | grazing experiment grazing intensity desertification plant community differentiation |
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