水土保持学报2011，Vol.25Issue(5)：252-256,5.
基于植物水分生理的节水灌溉效果评估
Effect Evaluation of Water Saving Irrigation Based on Water Physiological Characteristics
摘要
Abstract
In new-cultivated oasis,by taking main tree species（Populus russkii Jabl.） of backbone shelterbelt as the research object.Under A and B irrigation treatments,simultaneous monitoring stem sap flow,shoots water potential and photosynthetic characteristics,and combined with the data of meteorological factors,analysis and comparison the water physiological characteristics of the P.russkii Jabl.under the 2 kinds of irrigation treatments.The results showed that： Compare with A,B treatment,the stem sap flow speed was lower,the daily average decreased by 4.7%,but the differences were not significant（Sig.0.10）;Two treatments shoots water potential of the P.russkii Jabl.had no significant difference by test（Sig.0.142）;Under A treatment the P.russkii Jabl.leaf net photosynthetic rate（Pn）,stomatal conductance（Gs）,instantaneous transpiration rate（Tr）,water use efficiency（WUE） were higher than the B treatment＇s.Comprehensive analysis of that A treatment had a remarkable effect on,water saving,and could meet the water needs of the P.russkii Jabl.in the study area,and over-irrigation would adversely affect the P.russkii Jabl.;Plant sap flow,water potential and other water physiological characteristics indicators could do as a scientific basis for water-saving irrigation.关键词
俄罗斯杨/液流/水势/光合特性/灌溉方式Key words
P.russkii Jabl./sap flow/water potential/photosynthetic characteristics/irrigation mode分类
农业科技引用本文复制引用
马建新,李卫红,黄湘,朱成刚,付爱红..基于植物水分生理的节水灌溉效果评估[J].水土保持学报,2011,25(5):252-256,5.基金项目
国家“973”重点基础研究发展计划 （）
国家自然科学基金 （）
西部之光人才培养计划 （）
