文献类型：期刊文献

中文题名：彰武松树干液流特征及其与环境因子间的关系

英文题名：Relationships between stem sap flow rate of Pinus densiflora Sieb. et Zucc. var. zhangwuensis and environmental factors

作者：迟琳琳[1,2] 韩辉[1,2] 党宏忠[3] 张学利[1,2] 张日升[1,2]

第一作者：迟琳琳

机构：[1]辽宁省沙地治理与利用研究所,阜新123000;[2]辽宁章古台科尔沁沙地生态系统国家定位观测研究站,彰武123203;[3]中国林业科学研究院荒漠化研究所,北京100091

年份：2020

卷号：0

期号：1

起止页码：186-191

中文期刊名：干旱区资源与环境

外文期刊名：Journal of Arid Land Resources and Environment

收录：北大核心:【北大核心2017】；CSSCI:【CSSCI2019_2020】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金(31570704);中央基本科研业务资金(CAFYBB2014MA013)资助.

语种：中文

中文关键词：彰武松;液流速率;环境因子;热扩散技术(TDP)

外文关键词：Pinus densiflora Sieb.et Zucc.var.zhangwuensis;sap flow rate;environmental factors;thermal dissipation probe method(TDP)

分类号：S715.2

摘要：采用热扩散式树干液流计(TDP)连续监测了优良固沙树种彰武松(Pinus densiflora Sieb.et Zucc.var.zhangwuensis)树干液流速率在一个完整生长季内的变化规律。并同步监测了气象、土壤含水率等环境因子,在比较分析不同生长季节彰武松树干液流速率特征的基础上,分析了主要环境因素对彰武松不同生长季液流速率影响的规律。结果表明:1)在生长季的典型晴天,彰武松树干液流速率具有与太阳辐射一致的日变化过程,日变化曲线呈典型单峰型。2)彰武松日间平均液流速率的季节间差异显著,7月份液流速率最大,6月份由于受严重土壤水分亏缺的影响,平均液流速率最小。3)在雨季,彰武松液流速率对太阳辐射驱动的响应与土壤含水率间呈紧密的正相关关系;在旱季,液流速率对太阳辐射驱动的响应与土壤含水率间关系不明确。液流速率随土壤含水率的变化过程存在明显的阈值效应。
In this study,the sap flow rate of Pinus densiflora var.zhangwuensis,an important windbreak and sand fixation species,was monitored continuously using a thermal dissipation probe(TDP)method during the whole growing season,combined with simultaneous observations of precipitation,soil moisture,solar radiation and other environmental factors.The seasonal variation of J_s of sand-fixing tree species,as well as the effects by environmental factors have been analyzed.The results showed that:1)The diurnal variation of J_s in P.densiflora var.zhangwuensis presented a single-peak curve in sunny day.2)There is a typical seasonal variation of J_s.The highest J_s appeared in July,and the smallest one appeared in June due to serious soil water deficit.3)The ratio of sap flow rate to solar radiation(J_s/R_s)correlated to soil moisture content positively in rainy season,while the relations in dry season is not clear.The value of J_s showing a typical threshold responded to soil moisture content with a sharply declining.