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Analysis of water-use efficiency of plants in the Mu-Us desert, Inner Mongolia, China using carbon isotope discrimination Abstract :lb investigate the water use characteristics of four plants (Salix matsudana, Artemisia ordosica, Caragana korshinskii, Sabina vulgaris) lived in the Mu-Us desert, Inner Mongolia, China, intrinsic water-use efficiency was estimated using stable carbon isotope discrimination. The gas exchange rate was also measured, to estimate parameters of water loss and carbon gain. S matsudana, Artemisia ordosica and Caragana korshinskii had similar intrinsic water-use efficiency. As S matsudana had high water loss, high carbon gain when groundwater level was low, continued revegetation using S matsudana should be accompanied with adequate estimate of the amount of available water and density control. S vulgaris had high intrinsic water-use efficiency, low water loss.

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