Low yield chestnuts to achieve high yield and quality four skills
YT-M95 YT-M95 Shenzhen Sunshine Technology Co.,Ltd , https://www.szyatwin.com
One, smart fertilizer
The requirements of the chestnut on the mountain floor are different from those of other fruit trees. Adult results The chestnut trees are to be supplemented with fertilizers such as boron, manganese and calcium. Spring before the fertilizer can be applied to 300-400 grams of urea 300-400 grams of calcium 200-300 grams of ground borax 6-7 grams per square meter. In the rapid expansion period of fruit pods, sufficient fruit fertilizer should be applied in July, and 0.7-1 kg of ternary compound fertilizer can be applied. In the period from June to October, 5 g of borax and 5 mg of paclobutrazol per metre of leaching are applied to the tree plate. Once every 30 days, apply 3-4 times. After the fruit is harvested, the deep wintering and deepening points are used to re-apply the wintering fertilizer, which can be applied to pigs, calf manure or earth miscellaneous fertilizer 40-50 kg, and calcium magnesium phosphate 0.7-1.5 kg. In addition, spraying 0.2% borax + 0.3% urea + 0.2% potassium dihydrogen phosphate mixture twice every 10 days during the flowering period and spraying it twice can significantly increase the fruit setting rate. Fruit growth period can be combined with pest control every 30 days spray 0.3% urea + 0.2% potassium dihydrogen phosphate + mancozeb 800 times the mixture, can promote the growth and development of chestnut branches and fruits. Spraying 2,4-D once after fruit picking promotes flower bud differentiation and nutrient accumulation in chestnut, which lays the foundation for high yield and quality in the second year.
Second, Qiao trim
Chestnut is a hi light fruit tree with a high germination rate and branching rate. To ensure that the trees are airy and light-transmitting, remove the overwhelming prolonged branches and dense and thin branches in the tree crown. According to the amount of flowers and flower quality in the spring to control tip and tip work, promote secondary tip. The secondary tip generally leaves 2-3 branches per branch. For branches that are too long or have a small angle, pull branches and hanging sticks can be used to promote the opening of branch angles and differentiation of flower buds to balance the relationship between vegetative growth and reproductive growth. Chestnuts have a large number of male flowers and are easy to consume large amounts of nutrients. They must cut out the male and female flower inflorescences as early as possible. The female branches can have short cuts or toppings at the female inflorescences above 3-4; if they do not bloom for a long time or Only the long male chestnut trees with male flowers can be used to tie the main branch 1-2 times with a wire or use helical cutting or scoring techniques to promote flowering and female flower formation. The wire ties can be carried out from August to September. The tree is released before the second year of budding. The circumcision or nicking should be performed from September to October, taking care not to injure the xylem.
Three, Qiao Baoguo
Chestnut is a cross-pollination fruit tree in the same plant. Two or more varieties should be planted in the orchard to facilitate pollination. If the variety is single, artificial pollination and fruit protection can be carried out. In the flowering period, select chestnut male flower artificial pollination before 10 o'clock in the morning or after 3 o'clock in the afternoon. If there are more chestnut trees or tall trees, use a gauze bag to mix 3 - Four times of the starch was pollinated and pollinated within the canopy, pollinated once every 3-4 days, and continuously for 2 times. Chestnut fruit should be shredded in time to increase the fruit rate, maintain the tree vigor, and the ratio of leaf to fruit should be controlled between 20-25:1. There can be 1-2 fruit pods in the short and middle fruit branches and 2-3 fruit pods in the long fruit twigs. The strong growth of the middle leaves of the fruit, short fruit branches to retain the first fruit, sparse small, deformed, dense, pests and branches and empty pods.
Four, prevent disease and insect pests
In the fall and winter season, the trunk of lime sulfur mixture plus salt plus lime and metalaxyl manganese zinc plus water (1:1:6:0.5:20) mixture to brush the trunk can prevent and treat the disease. organization. Powdery mildew control can be sprayed at the beginning of the episode 0.3 Baumite lime sulfur or 50% Thiophanate 100 times. Chestnuts can be controlled by spraying insect pests 1000 times or 1000 times dichlorvos at the beginning of June. After picking the fruit, the fruit larvae can be killed by soaking the nuts with hot water at 50°C for 10 minutes. The key to prevention and control of Liriomyza larvae is scraping the winter bark of the worm eggs in winter, and white trunks are coated with lime sulfur mixture. In mid-May, the enemy is killed by 1500 times or 1000 times. Chestnut moth control can be sprayed insecticidal 800 times or iridescent phosphorus 600 times when the pests occur in July-August.
In addition, diseases and insect pests of chestnuts include anthracnose, chestnut bee, red-winged moth, longhorned beetle, peach aphid, and scale insect, etc., and they can be observed constantly, and timely, high-efficiency, low-toxicity, low-residue medicines are selected for comprehensive prevention and control.