避雨环境下苹果幼树水分状态指标对干旱胁迫的响应

doi:10.13287/j.1001-9332.201608.040

应用生态学报 ›› 2016, Vol. 27 ›› Issue (8): 2459-2466.doi: 10.13287/j.1001-9332.201608.040

避雨环境下苹果幼树水分状态指标对干旱胁迫的响应

高木旺¹, 聂佩显², 孙滢^1,3, 姜远茂¹, 张金春¹, 张继祥^1*

¹作物生物学国家重点实验室/国家苹果工程技术研究中心/山东农业大学园艺科学与工程学院, 山东泰安 271018;
²山东省果树研究所, 山东泰安 271000;
³青岛农业大学理学与信息科学学院, 山东青岛 266109

收稿日期:2016-01-11 发布日期:2016-08-18
通讯作者: * E-mail: zhangjx365@163.com
作者简介:高木旺,男,1991年生,硕士研究生.主要从事果树节水机理和节水灌溉技术研究.E-mail:gmwlxy@163.com
基金资助:
本文由农业部现代苹果产业技术体系建设专项资金项目(CARS-28)、国家科技支撑计划项目(2011BAD32B03-02)和公益性行业(气象)科研专项(GYHY201206023-03)资助

Response of water status indicators in apple saplings to drought stress under shelter from rain.

GAO Mu-wang¹, NIE Pei-xian², SUN Ying^1,3, JIANG Yuan-mao¹, ZHANG Jin-chun¹, ZHANG Ji-xiang^1*

¹State Key Laboratory of Crop Biology/National Research Center of Apple Engineering and Technology/College of Horticultural Science and Engineering, Shandong Agricultural University, Tai’an 271018, Shandong, China;
²Shandong Institute of Pomology, Tai’an 271000, Shandong, China;
³College of Science and Information, Qingdao Agricultural University, Qingdao 266109, Shandong, China

Received:2016-01-11 Published:2016-08-18
Contact: * E-mail: zhangjx365@163.com
Supported by:
This work was supported by the National Modern Apple Industry Technical System Program of Ministry of Agriculture (CARS-28), the National Science and Technology Support Project (2011BAD32B03-02) and the Special Fund for the Scientific Research in the Public Interest (Meteorology) of China (GYHY201206023-03).

摘要/Abstract

摘要： 在避雨环境下进行土壤水势渐进式下降处理,研究了苹果树体水分状态指标对土壤干旱胁迫响应的敏感性,分析了不同水分状态指标与树体水分平衡之间的关系.结果表明: 树干直径日较差(MDS)及中午树干水势(Ψ_stem)对干旱胁迫最敏感.MDS对参考蒸散(ET₀)有明显的响应,且对干旱胁迫比较敏感,与ET₀呈显著正相关,相对树干直径日较差(MDS_r)与相对土壤水势(Ψ_{r soil})呈显著负相关,树干直径可实现连续性测量及自动化记录.Ψ_stem对土壤干旱胁迫较敏感,且与ET₀呈显著负相关,相对中午树干水势(Ψ_{r stem})与Ψ_{r soil}呈显著相关,目前叶水势和树干水势难以实现自动化连续性观测.其他树体水分状态指标,如黎明前叶水势(Ψ_pd)、树干直径日生长量(DG)和气孔导度(g_s)等对中度或重度干旱胁迫也有不同程度的响应,但总体上对土壤水势变化的响应不敏感.

关键词: 干旱胁迫, 苹果树, 水分状态指标

Abstract: The main tree water status indicators which sensitively responded to drought stress and related to tree water balance were investigated in treatment of progressive decrease of soil water potential under shelter from rain. The results showed that stem maximum daily shrinkage (MDS) and midday stem water potential (Ψ_stem) were most sensitive to drought stress among all the water status indicators. MDS not only significantly responded to reference crop evapotranspiration (ET₀), but also was sensitive to soil drought stress. MDS was significantly positively related to ET₀, and the correlation between relative stem daily maximum shrinkage (MDS_r) and relative soil water potential (Ψ_{r soil}) was highly significant. Moreover, the stems could be measured in succession and recorded automatically. Midday Ψ_stem was also sensitive to soil drought stress, and significantly negatively related to ET₀. The correlation between relative midday stem potential (Ψ_{r stem}) and Ψ_{r soil} was significant. But so far, it is difficult to automatically measure either leaf or stem water potential. Predawn leaf water potential (Ψ_pd), daily stem growth (DG) or stomatal conductance (g_s) also responded to drought stress to some extent under moderate or heavy drought stress, but they were not sensitive.

Key words: water status indicator., apple tree, drought stress

高木旺, 聂佩显, 孙滢, 姜远茂, 张金春, 张继祥. 避雨环境下苹果幼树水分状态指标对干旱胁迫的响应[J]. 应用生态学报, 2016, 27(8): 2459-2466.

GAO Mu-wang, NIE Pei-xian, SUN Ying, JIANG Yuan-mao, ZHANG Jin-chun, ZHANG Ji-xiang. Response of water status indicators in apple saplings to drought stress under shelter from rain.[J]. Chinese Journal of Applied Ecology, 2016, 27(8): 2459-2466.

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避雨环境下苹果幼树水分状态指标对干旱胁迫的响应

Response of water status indicators in apple saplings to drought stress under shelter from rain.

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