太行山低山丘陵区3种树木叶温对土壤水分胁迫的响应  

Responses of leaf temperature of three types of trees to soil water stress in hilly areas of Taihang Mountain

作　　者：杨文卿[1] 张志铭[1] 侯娜[1] 赵勇[1] 王谦[1] 杨喜田[1] 樊巍 

机构地区：[1]河南农业大学林学院,河南郑州450002 [2]河南省林业科学院,河南郑州450008

出　　处：《河南农业大学学报》2015年第3期325-330,共6页Journal of Henan Agricultural University

基　　金：国家自然科学基金项目(31270750);"十二五"国家科技支撑计划(2011BAD38B00)

摘　　要：以侧柏、刺槐和栓皮栎为试验材料,通过测定3种树木的叶温及气温,研究了3种树木在水分胁迫下叶温的日变化规律。结果表明,(1)侧柏、刺槐和栓皮栎的叶温日动态对土壤水分变化的响应十分显著。表现出随着水分胁迫的加剧,叶温呈升高趋势;重度水分胁迫下,叶温值在各个时间段都明显偏高。(2)3种树木在不同的水分胁迫下,叶温与气温日变化趋势表现一致,均为早晚低,午间高;且叶温均低于气温;但在重度水分胁迫下的10:00-16:00时,栓皮栎的叶温高于气温。(3)3种树木的叶温随气温变化的各有其特点,侧柏和栓皮栎呈"单峰型"曲线,而刺槐表现为"双峰型"曲线。The experiment was conducted with Platycladus orientalis, Robinia pseudoacacia and Quercus variabili, the leaf temperature and air temperature were measured. In this paper, the daily variation and responding mechanism of the leaf temperature of the three types of trees under water stress was analysed and discussed systematically. The results indicated that： （ 1 ） the daily dynamic of the leaf temperature of Platycladus orientalis, Robinia pseudoacacia and Quercus variabili was remarkably responding to the variation of the soil moisture. The leaf temperature of all the three types of trees was obviously higher than that of the contrast, and was increasing gradually while the water stress was intensifying, the leaf temperature was especially high all through under serious water stress; （2） The daily variation of the leaf temperature of the three types of trees under water stress was matching the variation of the air temperature during the day, both of which were lower during morning and night, meanwhile higher during noon. In addition, except that the leaf temperature of Quercus variabili was higher than air temperature under serious water stress between 10：00 and 16：00, the curve of the daily variation of leaf temperature of Platycladus orientalis, Robinia pseudoacacia and Quercus variabili was lower than that of the air temperature under any other water stress level; （3） The variation of leaf temperature followed that of the air temperature, howere it showed variousiy on different trees. Platycladus orientalis and Quercus variabili offered unimodal type curves, while Robinia pseudoacacia offered a bimodal pattern.

关 键 词：侧柏 刺槐 栓皮栎 叶温 水分胁迫 

分 类 号：Q945.78[生物学—植物学]