Red Fuji is a major species of Apple
in China, but problems such as irregular fruit shape and low sugar content in fruit are present in production. In order to improve the commercial quality of fruit, the key technologies that can be taken are the following: Improved soil structure. Sandy land orchards use sand-sanding to replace soil, hillside terraces and all sides of the terraces are tight and rigid. The tree trays are deep-turned 80 to 100 centimeters and soil is mixed with grass. In the first year, 5000 kg of organic fertilizer is applied per mu, and thereafter 9 to 10 years. After harvesting fruit, 2 kg of organic fertilizer was applied per kilogram of fruit, and 2.5 kg of special fertilizer or phosphorus and potassium fertilizer was applied to each fruit tree. According to the principle of "pre-nitrogen phosphorus and potassium," the pre-emergence, post-anthesis, and fruit expansion were performed three times. Apply drought and water saving technology. One is the orchard cover grass. After wheat is harvested, wheat straw and wheat bran can be used to cover the grass. The second is the hole storage and fertilizer plus mulching. The third is to use clay or plastic bags containing 4 to 5 kilograms of water to bury 20 to 30 centimeters deep into the ground in different directions in the tree tray, and bury 3 to 4 per tree tray. Clean up the branch and adjust the structure of the orchard community. After entering the full fruit period, the overweight branch groups and skirts on the central stem should be removed in time, and the resulting branches should be moderately increased during the pruning period to promote the resulting branches. When the flower buds are removed, the flower buds on the back fruit branches and on the back of the weak fruit branches are left as little as possible, so as to ensure the high-quality and high-quality red Fuji with good fruit shape and moderate size. Apply biological methods and low-toxicity pesticides to control pests and diseases. Change the traditional spray control habits, and promote artificial catching or local spraying on large beetles or caterpillars such as beetles or caterpillars; if light pests occur, try to control natural enemies as much as possible; Poisonous pesticides should be treated with multiple drugs to minimize the use of chemical pesticides. Results The number of sprays throughout the year was controlled within 7 times. Prespreading, pre-flowering and post-flowering spray lime sulfur mixture can control a variety of pests and diseases. After harvesting, it is mainly controlled by Bordeaux mixture to control fruit tree diseases. It is used to kill crickets, lepidopterans and Other
pests by 20% and 3000 times respectively. % Diflubenzuron No. 3 2000 times liquid prevention, as far as possible without the resistance to insect pests full-fighting organic phosphorus and pyrethroid drugs. The orchard with severe mycotic disease sprayed twice in a flowering period at intervals of 10 days. Promotes fruit color enhancement. The fruit bagging is carried out 35 to 40 days after flowering. The bag is removed 30 to 35 days before fruit picking. The bag is first removed and then removed after 4 to 5 sunny days. Picking leaves and turning fruits is an effective measure to promote fruit coloring. Picking leaves is carried out 6 weeks before fruit picking. The main shading leaves above the fruit are removed, and the amount of picked leaves does not exceed 30% of the total leaf amount; fruit transfer is before harvesting fruit. After 4 to 5 weeks, the fruit surface is bright red and the fruit is lightly rotated 180 degrees. It has been proved that the redness rate of Red Fuji apple after picking leaves and turning fruit is above 95%.
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