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使用作物水应力指数和树冠温度测量来确定核桃果园的水状态

Lian Mao^1,2, Sen Lu^1,2, Linqi Liu³

¹Research Institute of Forestry, Chinese Academy of Forestry, Xiangshan Road, Beijing, 100091, China.

|April 1, 2025

概括

简化作物水压力指数 (CWSI_s) 有效地监测了核桃水的状态,其性能优于理论的CWSI_t. 这种非破坏性的方法有助于赤字灌策略,以提高核桃产量.

科学领域:

农业科学农业科学
植物生理学植物生理学
灌管理灌管理

背景情况:

准确评估核桃水状况对于缺水灌和产量改善至关重要.
农作物水压力指数 (CWSI) 是用于植物水量监测的常见工具,但其在核桃中的有效性需要澄清.
用中国西北地区的田间条件来评估CWSI适用于核桃园的适用性.

研究的目的:

评估简化CWSI (CWSI_s) 和理论CWSI (CWSI_t) 在跟踪核桃水状态方面的有效性.
分析在全灌和赤字灌下,核桃园水条件的日间和每日变化.
确定CWSI测量的最佳时间,用于日常水位跟踪.

主要方法:

在核桃园中同步监测树冠温度,气象参数和生理参数.
完全灌和缺水灌处理的应用.
计算和比较CWSI_s和CWSI_t与基于透气的CWSI (CWSI_{Tr_day}) 相比.

主要成果:

CWSI_s准确地反映了核桃园水状态的日间和日常变化.
当地时间12:00的CWSI_s显示了日常水位跟踪的最佳性能.
由于空气动力阻力计算错误,CWSI_t低估了水应力,并未跟踪日间变化.

结论:

CWSI提供了一种非破坏性的,快速和有效的方法来监测核桃水的状态.
CWSI_t的准确性受到空气动力学阻力参数化和最低遮阳阻力的季节性变化的影响.
需要进一步关注这些因素,以便在核桃园中准确地应用CWSI.

关键词:

阳顶的温度是天花板的温度.农作物水应激指数的指数核桃果园的果实园.水的压力是水的压力.

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