| China is one of the original center of citrus with abundant citrus resources and long plantation history. Longyan City of Fujian Province is located in the transitional belt crosses Central Subtropical zone and south subtropical zone. Because of the distinctive climate condition which caused by the unique landform of wuyi mountain daimao mountain and bopingling mountain, Longyan City is the southernmost area where suitable for cultivating extremly-early-ripening Satsuma Mandarin.Longyan City introduced twelve extremly-early-ripening Satsuma Mandarin varieties from Institute of citrus Research,huangyan,zhejiang in 1989. After more than ten years trial planting, demonstration, selection, and breeding, Daoye, Shiwen, Shanchuan NO.3 and Dapu cultivars were main extended. During the extension there were several problems,such as weakness of the trees, single strain, mature period and the period on market were both short. The research analyzed the advantage and present situation of cultivating extremly-early-ripening Satsuma Mandarin in Longyan City and the countermeasures were put forward.(1)Establish the structural combination which Daoye variety come into the market first, then shiwen shanchuan dapu cultivars come into the market by turn.(2)Choose the area with medium soil fertility to build orchard. Autumn fertilization is the most important, and organic fertilizer is the main fertilizer. Fertilize less or do not fertilize in summer. Thin the flower and fruit reasonably. Thinning flower during the first two years after planting which is the main measure to enhance the vigor of trees.(3)Optimum picking time not only based on colour-changed or not but also based on smooth degree, thickness, soluble solid ect.(4)Develop industrial management of Satsuma Mandarin production. Increase production input and solve the problem of small production scale, low industrialization level, and straggling postharvest technology. Improve the product quality comprehensively. |
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