At present, it is the critical period for citrus fruit enlargement, endoplasmic enrichment, and sugar increase. Scientifically do a good job of its post-management, so that the quality and output will be greatly enhanced to enhance the competitiveness of fruit products and the income of fruit farmers.

Glowing

Illumination is one of the basic conditions that light energy converts light energy into chemical energy, that is, carbohydrate, under the action of chlorophyll. Strong light, strong photosynthesis, high sugar content, sweetness. Such as the fruit on the top of the tree skin smooth, bright colors, sweet and fruity. On the contrary, it is a low-quality, low-quality, fruity taste. The annual sunshine duration of orange growth and development is more than 1250 to 1400 hours, and the annual sunshine hours in the Sichuan Basin is generally 1250 hours, which basically meets the requirements for orange sunshine hours. If September-October encounters autumn rain, the illumination will be insufficient, which will greatly affect the photosynthesis, reduce the sweetness, lighten the flavor, increase the acidity and reduce the quality. Enhanced light can improve the quality and yield of citrus.

1, moderate trim. For the citrus garden, which is too impenetrable, it can be pruned in moderation, and the light branches, cross branches, hidden branches and drooping branches can be eliminated. Increasing the ventilation and light transmission conditions of the tree enhances the light intensity, increases the endoplasmic quality of the fruit, and increases the smoothness and color of the peel.

2, laying reflective film. Reflective film is a kind of plastic film that is specially used to enhance light. The Sichuan Basin is 100-300 hours lighter than those in Guangdong, Guangxi, Jiangxi, and other citrus origins. Therefore, if there is rain in September-October, the ground should be covered with a silver reflective film to enhance the light intensity and hours and improve the fruit content. The amount of sugar increases the weight of single fruit.

Water control

In the September-October period, it is generally prone to autumn rain. This is extremely unfavorable for increasing the sugar content of fruit, and water control should be conducted to keep the orchard soil dry properly, which is beneficial to the improvement of fruit quality.

1, deep trench drainage. A row and a ditch is drained, 45 cm in width and 45 cm in ditch. During this period, weeds are kept free of weeds, muddy mud, free drainage, and there is no standing water. The groundwater level is less than 40 cm, keeping the roots breathing well.

2, film drainage. During the rainy season from September to October, membrane drainage can be applied in the car surface and in the ditch. In particular, reflective film is placed on the car surface, and a general film is laid in the ditch. This is extremely favorable for maintaining moderate soil moisture and cultivating high-quality fruit. After the fruit is harvested, the mulch film is recovered in time for use for many years.

Fertilizer

Insufficient fertilization in July-August, especially in orchards with insufficient organic fertilizer, can be fertilized once as appropriate, so that the leaves are rich in green light, and the application of phosphate fertilizer is higher fructose. Ground fertilization: The application of biogas fertilizer or pig manure 1 strain, especially the application of rotting oil and dry fertilizer, is good for improving the quality; Foliar fertilization: the leaf surface can be sprayed with 0.1% each of the mixture of ammonium molybdate and boric acid. 2 times, it will greatly improve the quality of the fruit.

Pest control

The fruit-feeding tobacco moth is harmed from September to October. It sucks liquid with a needle-like mouthpart, and has holes outside the victim, eventually causing the fruit to rot. The damage rate of fruit in the hilly orchard, which is relatively dangerous, can reach 20-30%, resulting in serious reduction of production. The use of "enemy killing" or "quick killing Ding" and other pyrethroid lipid pesticides plus "new high fat film increase" effect control effect is good, but in the 20-30 days before the picking can not be medication.

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