The experiment was carried out at the land shrub forest(Caragana korshinskii,Hipphae rhemnoides,Prunus davidiana) from 1991 to 1994 at Shanghuang Experimental Feild inGuyan county.This paper studied the daily changes of transpiration rate at growth period and theend of growth of three species,and the relationship between these changes and enviroment factor.Itwill contribute to understande demaned of water of different species of shrub at semi-arid condi-ton.and provide the scientific basis for energetically...
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