The weather changes greatly in autumn. What should I pay attention to when planting longan in autumn?

Longan is a kind of fruit that people like very much, and it is of high value and can be used as medicine. Today, the author simply sorted out some techniques and experiences about cultivating longan in autumn for farmers' reference, hoping to provide some help.

Through the results of several months, the longan tree has consumed a lot of nutrients, restored the tree's vigor and improved its stress resistance. In the four-month management from August to 165438+ 10, autumn is the key period for increasing longan production next year. The application amount of chemical fertilizer should be increased immediately before and after harvesting to promote longan fruit expansion and improve longan yield and quality. At the same time, it can restore the vitality of longan as soon as possible, improve the ductility of longan, and lay the foundation for super-high yield of longan in the coming year.

Take the actual fertilization amount as an example: each green plant produces longan fruit 100kg. Before obtaining chemical fertilizer, it is mainly available fertilizer 15 days ago, and 2kg imported compound fertilizer is used after raining or watering. After obtaining, each green plant uses 2 kg of compound fertilizer and 0/00 kg of human manure/kloc-. The fertilization method is to dig a ditch with a depth of 20-30 cm below the bisector of the crown edge, cover the soil layer after application, and water the plantation once when the standard allows, so as to increase the soil water content, improve the actual effect of longan tree in digesting and absorbing chemical fertilizer, and accelerate the recovery of longan tree vitality.

Shaping the fruiting branch lays the foundation for next year's bumper harvest and yield increase. The ideal fruiting branch of longan is the last perfect autumn branch, so we should strengthen the fertilizer and water management of the mother plant immediately after picking the fruit, promote the germination of autumn branches, and cultivate autumn shoots into real branches. Controlling the symmetry of autumn shoot germination with fertilizer and water is beneficial to plantation management and pest control.

Pruning Pruning In order to make the longan tree have a good crown and increase the total yield of longan, the longan tree should be pruned twice a year. Pruning in spring should be closely combined with thinning flowers and fruits, and pruning in autumn should be closely combined with pruning after fruit picking. Excessive growth and development of superior branches should be recovered (referring to new trees), lacking crown branches, stubble after fruit picking, diseased branches, pruning transverse branches, improving crown ventilation and restoring longan vitality.

The autumn temperature is suitable for pest control, and attention should be paid to pests such as longan psylla, fruit borer and Dendrolimus punctatus. Pest control methods include comprehensive chemical control sprayers and institutional fruit farmers to eliminate young eggs at the peak or early stage of germination after accurate measurement. Combined with the control of other pests, spraying with 1)20 times liquid or 10 times liquid can kill pests for 2000 times. (2)2.5 Spray the dead liquid for 2000 times, once every 15 days, until the buds are perfect. Sick tree skills should be deeply pruned to get rid of ghost diseases. At the same time, it is necessary to strengthen fertilizer and water management and cultivate thick branches.

In autumn, the temperature of low-yield forest was reduced, and the root activity of longan was enhanced. Low-yield forest and unmanned plantation should be maintained, and the soil layer should be improved. Organic fertilizer should be added to improve the soil texture, improve soil aeration, maintain soil water and fertilizer capacity and increase soil organic matter. In addition to using sufficient nitrogen, phosphorus and potassium fertilizers, other trace element fertilizers needed for longan growth and development should be used, and nutrients should be dispersed outside the roots to ensure the growth and development needs of longan in different periods. At the same time, we should turn over the soil, upgrade the hairy roots of longan, enhance the vitality of rhizomes, restore the vitality of longan trees, and cultivate strong branches to lay a good foundation for next year's results.