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中文摘要：
【目的】分析影响桃流胶病发生的关键因子，为其防治提供理论依据。【方法】2012～2014年，以广西油桃主栽品种中油5号为研究对象，对流胶病发病较重及发病较轻的两个典型产区的48个果园进行实地调查，从矿质营养、植物生理角度出发，并结合立地条件、气候环境等因子进行系统研究和对比，初步分析桃流胶病发生的关键影响因子。【结果】桃流胶病的危害程度与叶片矿质营养水平有较大关联，其中，Mg、Zn元素与病情指数的相关系数分别为．0．988和-0．961，均达到显著负相关水平（P〈0．05，下同），其次为Ca（0．804）、N（-0．757），其余元素与桃流胶病危害程度相关性较低；年降雨量与桃流胶病发生严重程度呈显著正相关，其相关系数为0．963。【结论】叶片Zn、Mg含量、年降雨量是桃流胶病发生的关键影响因子，南方春、夏季长时间降雨的高温不良气候条件是桃流胶病危害严重的重要诱因。
英文摘要：
[Objective]The key factors affecting epidemics of peach gummosis were analyzed, in order to provide theo- retical basis for further control of peach gummosis. [ Method ] Using main nectarine cultivar Zhongyou 5 in Guangxi as tested material, 48 nectarine orchards in 2 main peach producing areas infected by mild and severe peach gummosis were investigated in Guangxi during 2012-2014. Based on these survey data, the key factors affecting epidemics of peach gum- mosis were analyzed from perspectives of mineral nutrition and plant physiology, combining with systematic research and comparison of site conditions and climatic environment. [Result]The damage degree of peach gummosis was correlated with mineral nutrition level of leaves. Both Mg and Zn contents in leaves had significantly negative correlation with disease index of peach gummosis （P〈0.05,the same below）, and the corresponding correlation coefficient was -0.988 and -0.961, respectively, followed by Ca and N contents with correlation coefficient of 0.804 and -0.757. The rest of elements had less correlation with damage degree of peach gummosis. Furthermore, the rainfall had significantly positive correlation with damage degree of gummosis, the corresponding correlation coefficient was 0.963. [Conclusion]The Zn and Mg contents in leaves, and rainfall was the most key impact factors for gummosis occurrence. Furthermore, the major factor causing se- rious damage of peach gummosis is long-term adverse climatic conditions of high temperature and rainfall in spring and summer in South China.
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