The impact of wind on longan fertility and how to prevent and remedy it?

Wind is an important ecological factor for longan. Its effect on longan has both beneficial and harmful effects. The light breeze can regulate the temperature, promote air flow, replenish the carbon dioxide content around the leaves, enhance photosynthesis, and also transfer pollen to increase fruit setting. Longan encounters northwest wind during the flowering period, which can easily cause the stigmas to dry up and wither, affecting pollination and causing flowers and fruits to fall. Under the influence of strong winds, the transpiration of longan increases, the moisture balance is lost, and the photosynthetic intensity decreases, which affects the growth of longan. The longan-producing area in southeastern my country has a maritime monsoon climate. Typhoons often occur in summer and autumn (June to October), and the wind force can reach level 8 to 12. Because typhoons are paroxysmal and highly destructive, they cause serious damage to longan. When the typhoon comes, the longan (August-September) is close to maturity, and all the fruits can fall off in an instant, causing extremely serious losses and even no harvest. Typhoons also knocked down or uprooted longan trees. After September, affected by the cold and high pressure in the north, typhoons moved southward, mostly landing in the Beibu Gulf and attacking Guangdong and Guangxi. The heavy (heavy) rain brought by the typhoon is beneficial to the recovery of the longan tree after harvest, and promotes the autumn shoots after the second harvest, which is beneficial to the next year's yield.

In order to prevent and reduce the damage of typhoons, the following measures can be taken: Choose a wind-sheltered environment to build a garden. It is better to build a garden on a north-south slope in a hilly mountainous area. Horseshoe-shaped mountains with openings facing south are better because of their It is protected from the wind on three sides and the environment is better. Orchards built with windbreaks suffered significantly less damage. Orchard windbreaks can consider mixed coniferous and broad-leaved forests, a combination of tall, medium, and low tree species or trees, shrubs, and grasses. In this way, the wind resistance is relatively large and the windbreak effect is obvious. The height, width and other structures of the windbreak should take into account the sunshine requirements for the longan's growth results to avoid bias. In addition, Fujian Putian longan adopts the method of "main branch interconnection" to connect the branches to each other and reduce wind damage caused by wind shaking. If the wind-damaged trees are slightly tilted, they should be straightened, erected with pillars, loosened soil, weeded, and applied with 1 to 1.5 kilograms of coarse fertilizer (cow dung, human excrement mixed with peanut cake) per tree. to restore tree vigor as quickly as possible. For the longan tree blown down by the typhoon, the root system or rhizome cortex on the windward side is completely broken, while the root system or rhizome cortex on the leeward side is creased but not broken. As long as the corresponding pruning is carried out to reduce the burden on the root system, and piling is fixed to prevent When broken, callus will quickly form at the crease and new roots will grow. If the blown longan tree is straightened up, it will inevitably cause a creased root system, or the rhizome cortex will completely break again, leading to the death of the plant. Therefore, it is a technical misunderstanding to correct the longan blown down by wind damage.