连阴雨灾害对冬枣成熟期不同阶段裂果量的影响

Effects of Continuous Rainy Disaster on Quantity of Cracked Winter Jujube at Different Phase of Maturity Stages

为指导枣农开展农业生产及科研人员研究冬枣连阴雨灾害的防御措施提供数据和理论支持,通过冬枣成熟期连阴雨试验,研究连阴雨灾害对冬枣成熟期不同阶段造成的影响,并探索不同降水时间造成的灾害等级。结果表明:连阴雨灾害造成的冬枣裂果程度与降水时间和发育阶段存在显著相关性,连阴雨造成的冬枣裂果在脆熟阶段最明显,完熟阶段次之,白熟阶段最轻;连阴雨造成的裂果量与最高气温和日较差分别呈显著和极显著负相关;裂果量与含糖量在白熟和脆熟阶段呈共增趋势,进入完熟阶段,含糖量继续增加,裂果量呈先降后平稳的趋势;越接近采摘末期,连阴雨造成的落果越严重。

The effects of continuous rainy disaster on winter jujube at different phase of maturity stage are studied by continuous rainy experiment at maturity stage of winter jujube,and then the disaster level caused by different precipitation time is explored to provide data and theoretical support for guiding jujube farmers in agricultural production and research staff to study the prevention measures of continuous rainy disaster for winter jujube.Result:Cracking degree of winter jujube caused by continuous rainy disaster is signaificantly related to precipitation time and developmental stages.Cracked winter jujube caused by continuous rainy is most obvious at crisp ripening stage,followed by ripening stage and white ripening stage.The amount of cracked jujube caused by continuous rain is negatively related to maximum air temperature significantly and daily range very significantly.The amount of cracked jujube and sugar content show co-increasing trend at white ripening and crisp ripening stage of jujube.The sugar content increases continuously and the amount of cracked jujube shows a first rising and then stable trend at ripening stage of jujube.The jujube fruit dropping is more serious when continuous rain occurs at the end of harvesting stage.