The Correlation between Diseased Level of Jujube Black Spot and Nutrient Content of Jun Jujube Fruit under Different Cultivation Patterns

【 Objective 】 To study the relationship between jujube cultivation pattern and diseased level of jujube black spot, and correlation between the different diseased levels and changes of the fruit nutrient content and provide a theoretical basis for transformation and upgrading of the quality and effectiveness of jujube industry in Southern Xinjiang.【 Method 】Three kinds of different cultivation patterns of jun jujube were selected as the research object to establish the classification standard of jujube black spot and the incidence and diseased index were counted; The content of 10 kinds of main nutrients of jujube fruit were determinated using anthrone colorimetry, acid-base titration and spectrophotometry method etc., respectively, and a simple regression analysis was carried out using SPSS software.【 Result 】There are differences between the 3 cultivation modes of jujube black spot disease incidence and disease index and the content of total acid was positively correlated with the diseased grades of jujube black spot, and the rest was negatively related to 9 kinds of nutrients and jujube black spot disease level.【 Conclusion 】The bigger planting density of jujube, the more serious the diseased degree of jujube black, and different disease levels jujube black spot all could decrease the quality of jujube fruit.