2006•Sichuan linye ke-jiRequires access
Researches on Drought Resistance of several arbor Species in Arid Valleys of the Minjiang River
LI Yan-qiong, Hongsong Chen, Zheng Shaowei
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Abstract
The arid valley in the upper reaches of the Minjiang River is one of the worst ecotopes and the most difficult forestation regions in China.Based on the physiological experiment,researches were directed to 5 forestation tree species,i.e.,Cupressus chengiana、Pinus radiata、Ailanthus altissima、Ulmus pumila L,which showed a high survival rate and preservation rate.Research was made on the principal physiological indexes which could affect the drought resistance of forestation tree species,and the results showed that(1) the principal physiological indexes were sugar content,SOD activity,free Pro content,WSD,and water content and evaporation ratio in leaf blades;(2) By estimating the drought resistance of 5 forestation tree species,Cupressus chengiana showed the best,others were Ulmus pumila LRobinia pseudoacaciaAilanthus altissima in turn,and Pinus radiate showed the worst.