To keep up with non-nuclear sweet orange technology
1. Select high-sugar and low-acid Wenzhou tangerine strains: At present, there are more than 100 varieties of Wenzhou tangerine at home and abroad, which can be divided into three categories: special early-maturing, early-maturing and middle-late-maturing. In Zhejiang, the cultivation of special early-sensed Wenzhou mandarin has a lesser flavor, and in late-maturing Wenzhou mandarin, the general flavor is more acidic and the quality is also poorer. If it is medium-late-maturing Wenzhou oranges, it is feasible to replace them with high-yield ones and change them into early-harvest mandarin oranges. The quality will surely be significantly improved. 2. Improve soil organic matter content: The orange orchard with high quality, stable production, and high efficiency has an organic matter content of 2%-4%. At present, the organic matter content of the orange orchard in Xinyi, Zhejiang Province is about 1%. In order to produce high-quality fruit, spring green manure or summer green manure can be cultivated twice a year, organic fertilizers such as cow bullfighting, cake manure, etc. can be added, or cultivated by using the weeding method to increase the organic matter content of the orange orchard. In this way, the orchard's strength can be maintained. 3, scientific fertilization: It should change the past to pursue high yield as the goal of the fertilization method. High-sugar high-quality fertilization methods. When producing high-sugar high-quality Satsuma mandarin fruits, the total amount of fertilizer per acre should be 80-100 kg, and the ratio of nitrogen, phosphorus, and potassium is 1:1.2-1.5:1.2-1.5, from late June to late August and October. It is applied 2-3 times in the middle to early November. Generally, the adult mature tree and summer fertilizer plant will apply 0.6-0.8 kg of ternary compound fertilizer, plus potassium sulfate (potassium chloride may be applied between the mountains) 0.4-0.5 kg. The winter fertilizer plant imported 0.5-0.6 kg of ternary compound fertilizer and 2.0-3.0 kg of pig cattle fat. 4, reasonable pruning, ventilation and ventilation: low-acid high-sugar quality of high-quality Satsuma Mandarins, the use of low-dry low-crown three main branches natural pruning. The tree height is controlled from 2.5m to 3m, and 2 main branches are planted on each main branch to cultivate high-quality and stable canopy with the ability of three-dimensional results. For the tall canopy that has already formed more than 3 meters, it is necessary to re-cut and control the height, and the tree with the larger amount of pruning will be carried out in two years. The amount of sawing each time is less than 25%. 5. Controlling Fruit Production by Thinning Fruits: High yield is obtained for the production of high-quality fruit. In the Wenzhou Sweet Orange Garden with 60 acres, there are about 400 individual fruit trees, and the yield per mu is controlled at about 2 tons. Therefore, thinning and fruit thinning must be carried out. The flowering branches were carried out from late April to mid-May, and fruit thinning was carried out from mid-August to mid-September after fruiting. 6. Perfect cultivation to improve fruit quality: According to the experience of Linhai and Longyou, the ripening cultivation of early-maturing Wenzhou mandarin can promote good quality and beautiful color of the fruit, and the soluble solid content is as high as 13%, but the ripening cultivation fruit is long-lasting. Flower bud differentiation has influence and it easily causes size and annual results. End-ripe fruit is also easy to attack birds and beasts. It is not easy to implement in cold regions. The ripening cultivation in the south of Wenzhou area can be delayed until December, and Jinhua, Zhangzhou and Shaoxing areas must be harvested in mid-November in order to prevent the fruit from freezing or producing floating skin fruit. The amount of fruit left shall not exceed 1/3 of the number of fruit in the original whole tree. The increase in the sugar content of the big pods is not obvious. According to the party’s time, the summer fertilizer should be added to meet the nutrient requirements of the fruits, and the magnitude of annual results can be reduced. 7, film mulching and spraying sugar increase 1-2 degrees, so the film covered with sugar, fruit hillside better than the plain. The initial coverage time is best when the soil moisture content falls to 22% after 7-10 days of continuous clearing in the August drought. The coated sugar-coated orange orchard should be lightly cut in the spring to increase the leaf area and the assimilation product of the canopy, so as to lay a material foundation for raising the sugar content, and at the same time to carry out fruit thinning to achieve high fruit sugar. China Agricultural Network Editor