Sweet orange pomelo is a hybrid offspring of Ueda Satsuma Citrus as female parent and Bashuo Citrus as male parent. It matures from the end of 10 to the middle of February, and can be stored until May of the following year. The fruit is oblate, weighing about 200g, with orange peel, thick skin, orange-red pulp, soft and juicy, with soluble solids of 65,438+02 ~ 65,438+04% (see table for the determination of citrus endoplasmic substances such as sweet orange and pomelo), sweet taste, no bitterness, and no seeds or few seeds (2.7 grains per fruit on average). The endosperm of sweet orange pomelo was determined at 200 1, 1, 1, and the results are shown in the table below.

Variety soluble solids (%) total sugar (%) reducing sugar (%) total acid (%)

Sweet orange pomelo14.012.801.100.15 Qingyuan.

Cao Tian11.010.10 9.700.63 Urban Forest Farm

Huyou11.09.78 8.300.10 If the forest farm in the city is a hillside, it is necessary to dig a horizontal belt with a width of 2.5 meters, and then dig a planting pit or ditch in the middle of the horizontal belt with a depth of 60 cm and a width of 100 cm. The topsoil is separated from the organic fertilizer by 15cm, so that the root system will not directly contact with the fertilizer. Each plant is evenly mixed with soil with 0.5 kg of calcium phosphate fertilizer, and covered on the roots of seedlings, and the roots stretch layer by layer. If it is planted on a sunny day, it should be watered thoroughly. If planned close planting is adopted, plant 150 plants per mu (1.5m× 3m); If permanent planting is adopted, 75 plants (3m× 3m) will be planted per mu. It can be planted every spring from late September to1early October 165438 and from mid-February to the end of March.

There is no need to protect flowers and fruits in years with many flowers. In years with few flowers, 92O 1 g can be dissolved in alcohol and mixed with 20-25 kg of water to protect the fruit when the flowers wither by two thirds. The single fruit of sweet orange pomelo is important, and the leaf-fruit ratio should be kept at about 40: 1.

Excess fruits can be thinned, such as pests, deformed fruits, dense fruits, and then excess fruits. It is suggested that bagging should be carried out after fruit thinning to produce pollution-free and high-quality fruits. When budding, methyl chloride powder, diazinon granules, etc. After selection, it is mixed with fine soil and sprinkled on the soil surface of the tree tray once every 7 days for 2-3 consecutive times; When the diameter of the bud is 2-3mm (white), spraying phosphorus and trichlorfon on the crown; Remove the damaged flower buds as soon as possible, and concentrate or boil them deeply; Deep digging in the garden soil in winter can kill some overwintering pests pupae.