Vegetation and Soil of Alkalined Meadow Steppe in Wulanaodu Region, Inner Mongolia, Mainland China : 1. Comparison of Cutting and Grazing Pastures

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  • 内蒙古アルカリ化湿性ステップの植生と土壌 : 1.放牧地と採草地の比較
  • ウチモウコ アルカリカ シッセイ ステップ ノ ショクセイ ト ドジョウ 1

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Abstract

It was reported that meadow steppe in Wulanaodu, Inner Mongolia had been seriously degraded owing to overgrazing, soil alkalization and moving sand dune. Vegetation of cutting and grazing pastures were compared in order to find out the way of sustainable usage of pasture. The following results were obtained. 1. Seven vegetation types were identified according to their dominant species ; Suaeda, Chloris, Artemisia, Puccinellia, Aneurolepidium, Arundinella and Agropyron. Each type was distributed in small patches corresponding to the relative ground height, maximum value of which was 25 cm. It was observed that bare ground and Suaeda type were distributed at the lowest ground level, while Arundinella type and Agropyron type at the highest ground level. 2. As for the degree of degradation, it was considered that bare ground and Suaeda type were severely degraded, Aneurolepidium type, Arundinella type and Agropyron type were weakly or not degraded. 3. The grazing plot had higher frequencies in bare ground and Suaeda type than the cutting plot, and had not Arundinella type which appeared in the cutting plot. Moreover, growth of Aneurolepidium chinense in the grazing plot was inferior to that in the cutting plot. From these results it is concluded that the grazing plot is more seriously degraded compared to the cutting plot, and that cutting is more favorable usage than grazing from the conservational point of view.

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