It is the key to high yield summer tube in Zaoyuan
Jujube tree is affected by the nutrient environment of the tree, and the drop and fruit drop is very serious. Strengthening the summer management of the jujube garden is the key to improving the output of the jujube garden. Before the thinning and flowering, the dense branches and erect leggy branches should be removed in time to improve the spatial distribution of the resulting branches and the ventilation and light transmission conditions of the trees, so as to improve the photosynthetic efficiency. During the girdling period, the weak hanging and empty hanging on the jujube stocks should be neglected to reduce the invalid consumption, concentrate the nutrients of the tree, increase the number of effective fruit set, and increase the fruit setting rate. The girdling when the jujube trunk is 10 to 12 centimeters thick can only be girdling, and premature circumcision will cause premature failure of the crown. Method of girdling: The bark is peeled off at a height of 0.5 cm from 10 to 20 cm above the ground in the main flowering area of ​​Wangshu, exposing the xylem. One week after peeling, the insecticide was applied and wrapped with a plastic film to maintain the humidity. After the next year, girdling was performed 3 to 5 cm below the last circumcision and then ascended. When girdling, attention should be paid to “repeated peeling of trees and light peeling of weak treesâ€. Watering jujube requires sufficient water in the early stage of growth, especially in the flowering period and young fruit period. Water should be poured according to the weather. Watering during flowering can increase air humidity, which is beneficial to pollination and insemination, and increase fruit setting rate. Watering in young fruit can prevent fruit from falling off and promote young fruit growth. Foliar spray fertilizer fertilizer can make up for the nutritional deficiency of jujube tree in time, meet the needs of jujube flowering and fruit setting for nutrient, and it is an economical and effective fertilization method. Spraying time is generally selected in the bud period of jujube tree in early May, final flowering period in mid-June and the rapid growth of pulp, in mid-July. Spraying with 0.5% urea and 0.1% potassium dihydrogen phosphate had the best effect. Topping in late May to mid-June, according to the strength of the new jujube head growth and the size of the space, leaving 3 to 5 second branch topping, except the backbone extension branch, remove the top of the jujube head growth, control Nutrient growth, the distribution of nutrients leads to reproductive growth, so that flowering and young fruit growth get relatively more nutrition and reduce flowering and fruit drop. Pest control In the flowering period to the fruit expansion period, we must pay attention to the prevention and control of pests and diseases. 15% triadimefon can be used to control 1000-fold wet rust, with 80% of the dichlorvos 1000 times and 40% of phoxim 1000 times mixed spray to prevent Zaozhi, Myximpus, Prunus persicae and so on.