柠条（Caragana korshinskii）的水分生理生态学特性

 柠条的水分生理生态学研究表明，蒸腾速率为395.1±234.4mg·g-1·h-1(平均值±标准差)；小枝水势为-1.588Mpa；叶含水率为60.12±3.29%；蒸腾系数为72.82±19.88gH2O·gDW-1。林地土壤水分含量与蒸腾速率、小枝水势和叶含水率的关系十分密切。响应于年生长发育节律和水分条件的变化，柠条的抗旱性在年生长期初(5月)和旺盛生长阶段(8～9月）较弱，在高温干旱阶段(6～7月)和入冬之前(10月)较强。在年生长期中间(6～9月)，柠条的抗旱性与蒸腾速率、小枝水势和叶含水率之间均具有负相关性。

WATER ECOPHYSIOLOGICAL CHARACTERISTICS OF CARAGANA KORSHINSKII

The study on the water ecophysiological Characteristics of Caragana korshin skil shows that the transpiration rate (Tr) was 395.1±234.4 mg·g-1·h-1; the small branch water potential (Wp),-1.588±0.583 Mpa; the leaf water content (Wc), 60.12±3.29% and the transpiration coefficient, 72.82±19.88 gH2O·gDW-1. The correlations between soil water content and the Tr,Wp and Wc were statistically significant. The drought resistance was much stronger in the drought period (from June to July) and at the end of autumn (in October)than in the rapid growing periods (in May and from August to September), resulting from the responses to the annual changes in the growth and developmental stages as well as the environmental water conditions, from June to September, the Tr, the Wp and the Wc, respectively, were correlated negatively with the drought resistance index.