几种经济树种水分生理的研究

Research on water Physiological Characteristics of Several Fruit Trees

对在民勤沙区栽培的苹果梨、锦丰梨、金冠苹果、民勤小枣、沙枣５种经济树种的蒸腾强度、组织含水率、自然饱和亏、临界饱和亏、束缚水／自由水、水势、持水力、土壤含水率等８项水分生理指标的测定分析表明，这５种经济树种水分生理指标之间，蒸腾强度与水势呈正相关关系。其中，金冠苹果相关系数达到了０．９５５，呈显著正相关关系；锦丰梨相关系数达到了０．９８９，呈极显著正相关关系；并得出了锦丰梨、金冠苹果的蒸腾强度与其他指标间的多元线性回归方程。

With less rainfall and strong evaporatipn,the desert area in Heii Corridor has a serious shortage of water,Growing fruit trees in such area must be irrigated.The project“Study on Water Physiol-ogical Characteristics of several fruit trees” aimed at finding out the relationship between water physiology of the fruit trees and their water requirements.In past two years we have measured 8 water physiological indexes and analysed their correlation. The result shows that in the water metabolism process of the fruit trees the transpiration rate has a positive correlation with moisture content in the tissue,water potential,free water and criteal saturation deficincy,and the transpiration rate has a negtive correlation with water-hoding power, natural saturtion deficien-cy and bound water.The factors which can cause the changes of water requirement are respectively variety of fruit tree and growing Season.