How to improve longan tree?

How to improve longan tree? Please give guidance to longan tree improvement can refer to the following techniques: first, improve the soil ① hole expansion soil: in the trunk drip line to dig 40 cm deep, 30 cm 40 cm wide, 100 cm 150 cm long strip ditch, cut off the root system, promote new root growth. ② to do a good job in orchard supporting facilities: orchard supporting facilities such as storage tanks, flood control ditches and other construction, to ensure that the orchard will not be washed away in the rainy season, water irrigation in the dry season; ③ belt turning: the soil should be fully turned in winter, the depth can be 20 cm to 40 cm. Pay attention to the shallow turning or not turning near the trunk, do not hoe and cut off the roots. 2. Rational fertilization Longan can apply fertilizer four times a year: pre-flowering fertilizer in early February, accounting for 10% of the annual fertilizer application, with emphasis on phosphorus and potassium fertilizer; strong fruit fertilizer in early June, accounting for 25% of the annual fertilizer application, mainly phosphorus and potassium fertilizer; pre-harvest fertilizer applied in the first half of fruit harvest, accounting for 25% of the annual fertilizer application, mainly compound fertilizer; organic fertilizer and available nitrogen fertilizer were applied half a month after fruit harvest, accounting for 50% of the annual fertilizer application. Extra-root topdressing can be carried out many times in other periods, and nucleotides, potassium dihydrogen phosphate and Gomex can be used alternately. Third, half a month after pruning and harvest, big pruning, cutting off disease and insect branches, withered branches, over-dense branches, etc., and appropriate retraction of other branches to cut off some big branches to reduce the internal friction of the tree. Fourth, there are many kinds of diseases and insect pests that harm longan, among which pests such as stem borer and gall mites are small and overlap generations, so it is difficult to control them. Generally, it can be sprayed on the tender shoots of longan, once every 10 days. Pesticides with strong internal absorption and long efficacy should be selected, such as phoxim, omethoate, insecticidal and so on. Click to get more longan planting techniques click to get more fruit planting techniques