The summer orange canopy is tall and round-headed, with strong tree vigor and strong branch shoots. The fruit is spherical or elongated spherical with a single fruit weight of 140-170 g. The flesh is orange-orange or orange-red. The surface is slightly rough, and the oil cells are large and prominent; Sweet and sour taste, soluble solids 11% -13%, sugar content 8-10 g / 100 ml, acid content 1.2-1.3 g / 100 ml, quality in the upper, 6-7 seeds. Mature period of the end of April and early May. The special maturity of summer oranges is of great value in regulating the market supply. Therefore, this summer, the summer oranges have developed rapidly. After the autumn planting of summer orange to be managed in a timely manner: Planting green manure in the garden Green manure can increase soil fertility, improve soil structure, create a good soil environment for the growth of fruit trees, improve early results, improve quality and yield. Green manure is divided into winter and summer green manure. Winter green manure can be grown broad beans, red scorpions, etc. Summer green manure can grow soybeans, mung beans, pokeweed, green herbs and so on. In particular, the commercial land, also known as soil ginseng, is a perennial perennial plant that has been used for many years, and has a high potassium content of 7%, which is a potassium-rich green manure; winter green manure is turned into an orchard, and summer green manure is turned into an orchard in autumn. Annual soil coverage In the orchard without green manure, the soil must not be exposed and must be covered. In addition to the effects of cooling and moisturizing in the summer and freezing in winter, the covering can also provide a large amount of organic matter for the soil for the absorption and utilization of fruit tree roots. Cover can be used thatch, branches, leaves, pig cow dung, covering the thickness of 10 cm or more. Reasonable intercropping If the young orchard does not grow green manure and does not cover the soil, it can use crops grown in the soil before the crown of the fruit tree is closed to increase soil utilization and economic efficiency, and improve production and living conditions. It can grow winter radish, Chinese cabbage, summer soybeans, peppers, watermelons, and medicinal herbs. Can not grow corn, sugarcane, sunflower, wheat and other high-crop crops and pumpkin, wax gourd, gourd, sweet potato and other climbing crops. Planting suitable crops also leaves the tree stalks 70 centimeters. Too close the fruit trees grow poorly. Too far, the soil utilization rate is low. The harvested crops are to be placed in the garden and turned into fertilizers for decomposition and utilization by fruit trees. Timely tillage weeding If you don't grow green manure, you don't get coverage, and you don't grow fruit orchards. The garden will be overgrown with weeds. Therefore, in the summer, weeds must be ploughed and the winter must be turned over to prevent weeds and fruit trees from competing for fertilizer and water, and soil compaction, which affects the growth of fruit trees. Strengthen water and fertilizer management In the concentrated orchards, reservoirs and working pools should be built to prepare drought-resistant irrigation water, spray pesticides and chase fertilization materials in the autumn drought. Reservoirs are generally built at the collection point of the orchards, and each reservoir can hold 300-500 cubic meters of water. Appropriate layout of the working pool, each working pool can store 30-50 cubic meters. Conditional relatively concentrated orchards can be drip-irrigated. Drip irrigation can not only drought and water conservation, but also fertilize and prevent pests. Drip irrigation facilities per mu need to invest more than 300 yuan in cost, it will be able to meet the supporting facilities of water conservancy facilities, so that the fruit trees and drought insurance. Saplings are fertilized three times a year, ie spring, summer and winter fertilizers. Fertilizer applied in early March in March, 0.1 kg of compound fertilizer applied per plant, watered and ditched; summer fertilizer applied in late June, 0.2 kg of compound fertilizer per plant or 0.5 kg of vegetable dry powder, watered and ditched; winter fertilizer In late October, 20 kg of pig dung or 1 kilogram of dried vegetable powder was applied. Do a good job pruning At the time of colonization, cut the top 30 cm above the grafting interface to promote its branching on the main trunk. Branches on the main stem will be picked up when the three main branches are 30 centimeters long (picking) in each direction, and then picked up on each main branch. Three lateral branches were subdivided into three branches and nine heads to form a happy crown. Spring pruning: Cut off the branches on the trunk below the main branch branches and sparsely cut the crowded branches of the crown; Summer pruning: The two techniques are mainly used to wipe off buds and pick hearts. The summer shoots are all erased after germination to prevent the damage of leaf miners; the spring shoots grow to 30 cm and leave 30 cm to pick hearts, promote branching, and fail to pick the heart to turn into false axis branches, making it difficult to form the crown to form the crown. Also difficult to germinate the results of the branch; autumn trim: cut off some dense branches, clustered branches. Navel orange branching is characterized by multiple branches, thin and thin, difficult to flower bud differentiation, so we must remove some of the remaining branches to grow robust.
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