Difference in distribution of Agriphylum squarrosum (L.) Moq. by relative elevation from groundwater level in Mu Us Desert.

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  • 毛烏素沙地における地下水面からの比高によるＡｇｒｉｐｈｙｌｕｍ　ｓｑｕａｒｒｏｓｕｍ（Ｌ．）　Ｍｏｑ．（沙米）の分布の違い
  • ムウス サチ ニ オケル チカ スイメン カラ ノ ヒ コウ ニ ヨル Agriphylum squarrosum L Moq サベイ ノ ブンプ ノ チガイ

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Abstract

We investigated the distribution of A. squarrosum in the semi-fixed and shifting sand dunes at Mu Us Desert in Inner Mongolia. The relative elevations from the groundwater level to the A. squarrosum community, as well as the form and biomass of A. squarrosum were investigated. Research shows that A. squarrosum plants grew at elevations between 108 cm and 532 cm above the groundwater level. In plots over 500 cm above groundwater level, A. squarrosum is the most dominant species. In addition, the community of A. squarrosum was found in the environment in which other species didn't grow easily, such as areas where water supply to plants is limited. The long main root of A. squarrosum enables the plant to access dewfall water or moisture from under dry sand. The form T/R ratio of A. squarrosum was under 1.00 because of the main root length, and the biomass T/R ratio was over 1.00. The biomass of A. squarrosum was determined using the approximation method.

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