Learn the five key points of citrus scientific management in autumn and winter, and let your fruit trees bend under the pressure of fruitful fruits!

Citrus is a warm and humid climate, more hardy plants, so the management of autumn and winter is particularly important for the growth of citrus. It is also an important period of fruitful fruit before the citrus market, after all, there is a yield, good taste in order to get good income. The following content, the majority of citrus growers can look carefully!

In October, orchard management is mainly to reduce soil water evaporation, prevent and control diseases and insect pests and protect leaves through the winter, early-maturing citrus should apply more fruit-picking fertilizer to stabilize the tree potential, and middle-and late-maturing varieties should spray foliar fertilizer to promote fruit coloring and improve sweetness.

1. Drought resistance and drought prevention reduce soil water evaporation. The focus of fertilizer and water management is to fight drought and prevent drought in time, and drought prevention should be done before drought. Navel oranges, tangerines, tangerines and horsewater tangerines are in the peak period of fruit drop and fruit cracking before harvest. Tree plate mulching should be done before drought to keep the soil loose and moist as far as possible, reduce soil water evaporation, and irrigate in time when it does not rain for half a month. in order to meet the requirements of increasing moisture in the fruits of middle and late ripening varieties.

2. Deep turning and pressing green, applying heavy fertilizer from September to October is also the best season for deep turning and pressing green green manure (mung bean, soybean, Tianqing, peanut vine, etc.) in summer, which can be combined with heavy fertilizer application in order to renew the root system. Specific methods: young citrus orchards can open an annular ditch with length × width × depth = 40 × 30 × 80 cm outside the crown dripping line to put 20kg green manure, 2.5kg N, P, K compound fertilizer, add organic fertilizer such as pig and cow fertilizer or bran fertilizer, and add 0.5 kg lime at the same time, mix well with the soil and return to the pit to fill the heavy fertilizer pit, 5 cm higher than the pit surface.

3. Improve the soil. The content of soil organic matter in red-yellow soil citrus orchard in South China is low. Planting green manure is an effective measure to improve soil, increase the source of organic matter, raise orchard and solve the shortage of fertilizer in citrus orchard. Winter green manure can be sown between rows of young citrus orchards from September to October.

4. Early-maturing varieties apply postharvest fertilizer. Early-maturing varieties such as Wenzhou mandarin can apply fruit-picking fertilizer in time within half a month after fruit harvest at the end of September and the first ten days of October, and apply organic matter water fertilizer + trace element fertilizer to restore tree potential.

5. timely prevention and control of diseases and insect pests. The weather is dry and the temperature is still high in South China from September to October, which is the most rampant period of citrus mites (red spiders, rusty spiders). Therefore, we can not relax the prevention and control of mites, at this time to check frequently, found that each field of vision has 2 or 3 heads should be sprayed in time. Citrus mites can be effectively controlled by citrus.

In winter, that is, after November, we should focus on the following work:

The main results are as follows: 1. Combined with winter pruning, the withered branches, pest branches, diseased leaves, cross branches, drooping branches and overgrown branches of citrus trees were removed, and the underground litter was swept away and burned.

2. Remove weeds from the garden and edge of the garden, and use them as materials for expanding and turning the soil or covering tree plates.

3. After pruning, the whole garden was sprayed with Baume 0.8 degree stone sulfur mixture once to eliminate overwintering insect pests. Fourth, the trunk is white: mix 1 kg of quicklime, 8 kg of water and 1 tablespoon of salt evenly, and then paint the white trunk. If there is a tree trunk endangered by longicorn beetles, you can use cotton wool dipped in dichlorvos into the depths of the hole, and then fumigated with wet mud.

Finally, the most critical step is scientific picking and commercialization:

1. Timely picking to avoid malignant early picking

2. Popularize the picking technique of "one fruit and two shears", that is, after the fruit is cut off by the first knife, the stalk is cut again to avoid excessive length of the stalk to damage other peels and cause rotten fruit; at the same time, it is soaked and kept fresh immediately after picking, and it is classified according to the grading standard of citrus and sold in promotion boxes.

The majority of citrus growers must pay attention to what kind of management methods should be adopted in what period, and not all of them use the same method. Only by using scientific management methods can your fruit trees produce many and delicious oranges and obtain higher economic benefits.