The warming of temperature Longan drenched with water and fertilizer to promote bud emergence

At present, the main work of longan cultivation is to promote fruit trees to bud in time. We should pay attention to weather changes, prevent freezing damage, do a good job in clearing gardens and reduce the occurrence of diseases and insect pests.

At present, according to the author's observation in Guangzhou litchi, longan garden, March red early control of the tree flower spike length of more than 10 cm, but late shoot trees, there is no flower point; Feizixiao early control of the tree flower spike nearly 10 cm long, late autumn shoot buds have not sprouted; Nuomici, Guiwei, Huaizhi early control of the tree flower spike length of 2-3 cm, late autumn shoot buds have not sprouted, last October out of the autumn shoots, in the recent warming situation, most have seen "white spots." Longan young trees began to sprout as early as January when the temperature was higher, and stopped growing after the temperature dropped; buds began to soften after the "beginning of spring" and began to sprout again; vigorous and mature trees or old trees with timely autumn shoots had softened their buds ready to sprout; autumn shoots were slightly later and mature trees had not sprouted yet.

Recently, the temperature has warmed up and there is dew, litchi, longan as long as the normal growth buds will continue to sprout, flower ears or new shoots; at present, the main work is to let litchi, longan bud in time, pay attention to weather changes, prevent freezing damage, do a good job in garden cleaning, reduce the occurrence of diseases and insect pests.

Longan is in the late stage of flower bud differentiation, bud stage or flower spike development stage. In Hainan Island and western Guangdong,"shoot rush" occurred at high temperature in January. At present, many orchards grow normally, and timely autumn shoots can normally bud.

> Current management points of longan cultivation:

① Fertilization. Many orchards will bear too much fruit, so that the economic value of fruit decline, but also cause tree weakness, the emergence of large and small annual fruit phenomenon. Therefore, in order to fertilize and improve the soil, organic fertilizer can not only provide nutrients, but also cultivate microorganisms around the soil, which has a good effect on soil water conservation and gas conservation. Fertilization at budding stage not only provides nutrients for flowering, fruit setting and early growth and development of young fruits, but also provides nutrients for flowering, fruit setting and early growth and development of young fruits. Therefore, quick-acting fertilizer and late-acting fertilizer should be mixed and applied. General compound fertilizer mixed with organic fertilizer, if the tree is weak or the leaf color is yellow, appropriate amount of quick-acting nitrogen fertilizer can be added.

(2) Drenching water promotes flowering ears. Longan can normally bud in addition to sufficient nutrients, but also need appropriate climatic conditions, such as temperature at 10-13℃, intermittent light rain, sunshine, so that the basic will not "rush". After the "beginning of spring", the temperature rises faster, especially in the case of high temperature and rainy weather, it is easy to appear "rush shoot". At present, there is no budding tree to drench a permeable, and spray 1-2 times to the crown of green color cytokinin, strive to make longan flower buds appear on time.

(3) clearing gardens and preventing diseases and insect pests. Reduce pest damage by clearing gardens. The main pest of longan in spring is P. angularis, which damages the new leaves of longan. When the temperature is higher, overwintering bugs begin to move, and can be captured manually or sprayed with 800-1000 times solution of 100 enemy insects to kill insects.

4. Prevent "shoot rush" and ensure flower quality. If there is a "shoot rush", when the first new leaf unfolds, you can spray 1 time to control the shoot, forcing the leaves to stop growing or harden, or turn green, so that the flower ear grows. When the new shoot leaves appear droop, yellowing, shrinkage, indicating that the leaves have stopped growing, do not deal with.