不同水分状况下桃树根茎液流变化规律研究  

Variations of Stem and Root Sap Flow of Peach Tree Under Different Water Status

作　　者：龚道枝[1] 王金平[2] 康绍忠[1] 胡笑涛[1] 张富仓[1] 李志军[1] 

机构地区：[1]西北农林科技大学旱区农业水土工程教育部重点实验室 [2]河北省水利厅农水处

出　　处：《农业工程学报》2001年第4期34-38,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金 (3 9870 478)

摘　　要：利用热脉冲技术研究桃树根茎液流变化规律 ,并用自动气象站对气象因子进行同步监测。对液流日变化、日际变化及不同位点液流变化规律进行了研究 ,还分析了水分胁迫下树干液流的波动特征。运用回归的方法建立环境气象因子与树干液流量之间的数量关系。其结果表明 :根茎液流日变化和日际变化趋势相同 ;木质部内不同深度处液流速率大小不同 ;水分胁迫下 ,树干液流有波动特征 ;In this paper, the heat pulse technique was applied to study the stem and root sap flow of peach. At the same time, an automatic weather station was used to monitor meteorological parameters. The day to day variation of stem and root sap flow, the variation of stem and root sap flow at different depths below the cambium and the variant characteristics of stem sap flow of peach tree under different water status were investigated. The results show that, the day to day variant trend of sap flow in the stem is similar to that in the root, the stem and root sap flow rates at different depths below the cambium are various. As well as there are some fluctuations of stem sap flow under water stress, and the sap flow model developed can forecast the peach transpiration well.

关 键 词：热脉冲技术 根茎液流 水分胁迫 变异特异 桃树 

分 类 号：S662.1[农业科学—果树学] S152.75[农业科学—园艺学]