1, weeding weeding. Serious weeds occur in orchards in summer, compete with fruit trees and compete for fertilizers. The cultivator not only removes weeds (can be removed if necessary), but also loosens the soil and prevents evaporation of soil moisture. However, during this period, the root activity of the fruit trees is very strong. To prevent root damage, the cultivator should be shallow, and the depth should be 5-8 cm.
2, young fruit expansion fertilizer. This period is the peak season for fruit trees. Top dressing can promote fruit growth, improve quality, increase single fruit weight, promote flower bud differentiation, and enhance photosynthetic accumulation, which is beneficial to the cold resistance of trees and the results of the coming year. Adult fruit trees and the results of the amount of 50 kg, strains of fertilizer or fruit tree fertilizer 2.5-3 kg, plus 1 kg of urea. Fruits weighing about 25 kilograms, with half the amount of fertilizer. Fruits weighing more than 50 kilograms may be top-dressed according to the circumstances. In this period, the mixture of potassium dihydrogen phosphate and 0.3% urea was used to supplement the leaves with fertilizer 2-3 times to supplement the nutrient of the tree and the coloring of the fruits at the later stage.
3, drought and water. During this period, the temperature is high, the evaporation is large, and the fruit volume increases rapidly. The flower buds also begin to differentiate. In order to reduce the differentiation of fruit and flower buds, the water can be watered according to the soil moisture in the drought, so that the tree body and the young fruit can quickly absorb fertilizer and water. purpose.
4, tree trim. Pruning in this period is mainly to improve the condition of tree ventilation and light transmission, regulate the transport and distribution of nutrients, regulate the contradiction between growth and results, inhibit excessive growth, and transform it into the direction of flower bud differentiation. The main techniques of pruning are to wipe buds, pick hearts, pull branches, and thin branches.
5, pest control. The main pest is peach aphid. It drills fruit directly, causing bad fruit. Followed by turtle wax and other. Diseases include dry rot and brown spot. Prevention of peach aphid, 25% diflubenzuron 3 glue suspension can be used 1500-2000 times liquid, or with 20% cypermethrin 1000-1500 times spray control. General control 3-4 times. If rainy days, the number of prevention and control will increase. Control adult adult turtles, can use 40% of the speed of culling 650-1000 times liquid, control Ruoqiang, can be used 40% speed culling 1000-1500 times liquid spray, or use 25% of the cull 1000-1200 times liquid Spray protection. In severe cases, spraying with 800-1000 times liquid, the effect is good. Prevention of dry rot, brown spot, etc., can be used 50% of carbendazim WP 800-1000 times or 1:1:200 times Bordeaux mixture, control once every 15 days, the effect is better.
6. Re-matching of first-term sows
When weaning, all sows used Regumate drugs continuously for 5 days. The sows were fed in a single pen and were still fed lactating sows. After using this aphrodisiac, boars were not used. When the drug is completely excreted, boars are used for estrus identification and the number and spacing of breedings is the same as the initial allocation. 90% of the weaned sows had estrus within 11-15 days (average 13.8 days) after weaning and the quasi-estimated rate was 93%. For those sows that had not been in heat for 20 days, PG600 was injected and no estrus was eliminated within 10 days. The total litter size of the second-sorrow sow is 12.5, and the sow's elimination rate is 18%. The average number of sows in the group was 4.4, and the total elimination rate of sows was 48% (including 7.5% of death rate).
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