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Scientia Silvae Sinicae ›› 2019, Vol. 55 ›› Issue (2): 109-117.doi: 10.11707/j.1001-7488.20190211

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Relationships between Fruit Shrinking Disease and Mineral Element Contents in Ziziphus jujuba

Zhang Xuan1,2, Song Taoliang1,3, Liu Ping1,2, Liu Mengjun1,2   

  1. 1. Research Center of Chinese Jujube, Agricultural University of Hebei Baoding 071001;
    2. Industrial Technology Research Institute of Chinese Jujube in Hebei Baoding 071001;
    3. Forestry Tourism Bureau of Zanhuang County, Hebei Province Zanhuang 051230
  • Received:2017-07-28 Revised:2018-08-10 Online:2019-02-25 Published:2019-03-20

Abstract: [Objective] This study aimed to investigate the relationships between soil mineral element contents and fruit shrinking disease (FSD) in Chinese jujube (Ziziphus jujuba) and explore effective control methods of FSD,in order to provide theoretical and technological support for the prevention of the serious jujube fruit disease.[Method] This study systematically compared the dynamic changes of nine main mineral elements in leaves and fruits of jujube in the course of occurrence of jujube fruit shrinkage disease in severe and light FSD area as well as targeted fertilization areas.[Result] The contents of potassium,manganese,copper and boron in leaves in light disease area were significantly higher than those in severe disease area,while the calcium content in leaves in light disease area was significantly lower than that in severe disease area.The potassium and manganese contents in fruits in light disease area were significantly higher than those in severe disease area,and the calcium content in fruits in light disease area is significantly lower than that in severe disease area.After targeted fertilization of potassium and manganese,FSD incidence was significantly reduced from 57% to 15%,meanwhile potassium and manganese contents in leaves and fruits significantly increased but calcium contents significantly reduced.Spraying fungicides and growth regulators on the basis of supplementing K and Mn is more effective in controlling fruit shrinkage.The optimal nutritional index in leaves for controlling FSD in Taihang Mountains jujube growing regions was preliminarily determined by using the principal component analysis,i.e.,potassium content in leaves was higher than 2.06±0.23 mg·g-1,manganese content was higher than 261.83±21.54 mg·kg-1,and calcium content was lower than 1.07±0.11 mg·g-1.[Conclusion] The occurrence of FSD is closely related to lower contents of potassium and manganese and higher content of calcium.This study provides a new effective way to prevent and cure fruit shrinking disease via soil potassium and manganese application in Chinese jujube.

Key words: Chinese jujube, fruit shrinking disease, potassium, manganese, calcium, tree disease

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