王敏;邱洁雅;何义仲;李文广;凌丽俐;淳长品;付行政;曹立;彭良志;

• 1:西南大学柑桔研究所·国家柑桔工程技术研究中心

摘要(Abstract)：

【目的】研究石灰水喷施浓度和覆盖率对‘纽荷尔’脐橙和‘沃柑’的果面温度、叶面温度、日灼发生率、果实品质等影响,以确定日灼防控的适宜喷施浓度和覆盖率。【方法】以‘纽荷尔’脐橙和‘沃柑’杂柑为材料,设置5个石灰水质量浓度0(CK)、5、10、20、40 g·L^(-1)和2个喷施覆盖率30%和50%,于夏季高温来临前对树冠进行喷施。【结果】与对照相比,喷施石灰水能显著降低叶面和果面温度,但其降温效果具有阈值。随喷施浓度和覆盖率的升高,叶面反光率升高,日灼程度和日灼发生率降低。质量浓度40 g·L(-1)和2个喷施覆盖率30%和50%,于夏季高温来临前对树冠进行喷施。【结果】与对照相比,喷施石灰水能显著降低叶面和果面温度,但其降温效果具有阈值。随喷施浓度和覆盖率的升高,叶面反光率升高,日灼程度和日灼发生率降低。质量浓度40 g·L^(-1)覆盖率50%的处理叶面反光率最高,日灼发生率和日灼程度最低。喷施石灰水能显著增加果实硬度,影响维生素C含量、色度L值、可溶性固形物含量和可滴定酸含量。主成分分析表明,采用石灰水质量浓度为40 g·L(-1)覆盖率50%的处理叶面反光率最高,日灼发生率和日灼程度最低。喷施石灰水能显著增加果实硬度,影响维生素C含量、色度L值、可溶性固形物含量和可滴定酸含量。主成分分析表明,采用石灰水质量浓度为40 g·L^(-1)、喷施覆盖率为50%提高‘纽荷尔’脐橙和‘沃柑’果实品质的效果最好。【结论】喷施石灰水能显著降低果实和叶片日灼,且对果实品质无不良影响,在日灼易发区,推荐喷施石灰水质量浓度为40 g·L(-1)、喷施覆盖率为50%提高‘纽荷尔’脐橙和‘沃柑’果实品质的效果最好。【结论】喷施石灰水能显著降低果实和叶片日灼,且对果实品质无不良影响,在日灼易发区,推荐喷施石灰水质量浓度为40 g·L^(-1)、覆盖率为50%。

关键词(KeyWords)： 柑橘;石灰水;温度;日灼;果实品质

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划课题（2017YFD0202006）;; 国家现代农业（柑橘）产业技术体系建设专项（CARS-26-01A）

作者(Authors): 王敏;邱洁雅;何义仲;李文广;凌丽俐;淳长品;付行政;曹立;彭良志;

DOI: 10.13925/j.cnki.gsxb.20200163

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