1. Scientific fertilization and irrigation: 1 Rational application of nitrogen fertilizer to achieve post-promotion and post-control. Nitrogen fertilizer was applied before, during and after flowering, and nitrogen fertilizer was stopped in August. The nitrogen content in the leaves was too much, which would affect the coloration of the fruit. 2 Increase the application of phosphorus and potassium fertilizer, and increase the application of diammonium phosphate in June-August. Potassium sulphate, not less than 0.50 kg per plant; 3 foliar spray fertilizer, spray 500 times photosynthetic micro-fertilizer every 15-20 days after fruit setting, and spray O.3%-0.5 in August % potassium dihydrogen phosphate 2-3 times, can significantly increase coloration; 4 water control should be properly controlled before harvesting to prevent the tree from prolonging, fruit coloring is accelerated 20 days before harvesting, irrigation should be strictly controlled, and water should be drained after rain .
2, to carry out summer shears, improve the lighting conditions before the apple begins to color (8th, September), in the canopy of the canopy and orchard in time to remove the densely over the branches, open the inter-floor, inter-row illumination. At the same time, using the branches and struts to open the large branch angle, 80-85 degrees is appropriate, to ensure that the fruit in the tree has sufficient light-receiving conditions to facilitate coloring.
3. Rational use of drugs After August, it is forbidden to spray Bordeaux mixture. Because the peel under the drug spots is not colored, it should be sprayed with fungicides that do not contaminate the fruit surface and have no residual toxicity, such as mancozeb, enemy bacteria, and bacteria. Dan et al.
4. Strictly control the load of the tree body. The suitable load can be determined according to the dry section method or the leaf-to-fruit ratio method. It has been proved that if the fruit is too much, it is suitable to affect the light, so that the coloring of the fruit is dim and the coloring time is delayed. Try to leave a single fruit when thinning the fruit, which is convenient for bagging and fruit transfer.
5, spray coloring agent Marshal apple 30-40 days before fruit picking, spray 1-2 times 30-40 mg / kg of acetic acid, not only can prevent fruit drop before harvest, the rate of full red fruit can reach 80% or more; Spraying 1000 mg/kg or less of ethephon in the first 40 days has a significant color-increasing effect; in addition, spraying 500 mg/kg of rare earth, spray-producing bacteria, and broad-spectrum can play a certain role in coloring.
6, the application of new technology 1 set of bags, generally 30 to 45 days after the flowering began to bagging, wheat before the end of the set, first spray a disinfectant and insecticide before bagging, and then combined with fruit thinning. The paper bag is generally removed about 30 days before harvesting. When the bag is removed, the outer bag is torn open, and the inner bag is removed after 3-5 days. Its coloration is generally more than 25% more than the uncased fruit. 2 picking leaves, 6 weeks before harvesting, remove the 5-10 cm shading leaves around the fruit, picking leaves to be carried out in batches, first pick yellow leaves, thin leaves and lower old leaves, leaflets, then pick autumn leaves and medium length Some of the leaves affecting the light transmission on the branches, so that 60% of the fruit surface is exposed to direct light, thereby preventing the occurrence of spots on the fruit surface and increasing the degree of coloration. 3 Turning fruit, combined with leaf picking, changing the position of the stick and the direction of the fruit, turning the shade of the fruit to the sunny side, and pulling and fixing with transparent plastic tape, so that the fruit is uniformly and uniformly colored. 4 Laying the reflective film, 30-40 days before fruit harvesting, the film is placed under the canopy, which can improve the condition of the inside of the canopy and the lack of light in the lower part, so that the fruit in the lower part of the canopy is especially colored and surrounded, and the whole red fruit is truly achieved. the goal of.
7. Appropriate batch harvesting of red rich soil apples are late and slow, the temperature drops in late autumn, and the temperature difference between day and night increases. Appropriate late harvesting is beneficial to fruit coloring. Generally, it is harvested in batches from late October to early November. After the coloring is good, the difference is poor.
8. After the post-harvest artificial coloring, choose the shady and ventilated place, put a layer of 10-20 cm of fine wet sand on the top, and arrange the fruit with poor coloration on the fine sand. There is a gap between the fruit and the fruit. It is divided into early, middle and late every day. 3 times spray cold water on the fruit surface, reduce the temperature, increase the temperature difference, prevent the fruit from losing water and promote coloration. After 3-4 days, the fruit is turned over once, and after 2-3 days, the whole fruit can be colored.
Gabion Box,Gabion Fencing,Galvanized Wire Mesh
Mesh Fence,Temporary Fence,Gabion Box Co., Ltd. , http://www.nsfence.com