摘要
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。
The study on the water ecophysiological Characteristics of Caragana korshinskii 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.
出处
《植物生态学报》
CAS
CSCD
北大核心
1996年第6期494-501,共8页
Chinese Journal of Plant Ecology
基金
山西省科技发展基金
山西省回国留学人员基金
关键词
柠条
蒸腾速率
水分生理生态
森林树种
Caragana korshinskii
Transpiration rate
Pressure-Volumecurve
Drought resistance index
