Management after Deciduous Leaves of Jujube
First, increase fertilization water jujube tree in 1 year of growth, results in the consumption of a large number of nutrients, the need for timely replenishment, after the jujube deciduous, soil fertilization before freezing. If there is no application in the past years, it should be supplemented before the germination in early spring. Fertilizer can be spread or applied. The applicator spreads the fertilizer evenly under the canopy, and then turns it into the soil. Gully is divided into radial groove and well-shaped groove. The saplings should be applied in radial furrows. The practice is to dig 6-8 ribs 20--40cm wide, 10-20cm deep, inner shallow outer depth, inner narrow outer width, and radial ridges, 20cm from the trunk to the outside of the crown. Apply fertilizer and cover soil. The results of the tree using a gutter-shaped groove, under the canopy dug width 30cm, depth 15-20cm of the ditch, the gap of 30cm, applied into the ring fertilizer, covering the soil leveling. The next year, the fertilization ditch was excavated from the direction of the vertical tree row. In the previous year, the fertilization ditch was formed in a well shape to increase the fertilization surface and improve the effect of fertilization. Jujube roots are not easy to recover after injury, and care should be taken to protect the rough roots with a diameter of 0.5 cm or more. The amount of fertilizer should be determined according to the yield, the general results of trees, strains produce fresh dates about 10-25kg, apply circle 75--100kg, plus superphosphate 1.5--2.0kg. If basal fertiliser is applied in spring, part of nitrogen fertilizer can be added. After the fertilization, it should be watered in time, and the amount of water to be poured shall prevail. 2. Turning management management belts The jujube management belt can not only loosen the soil, block rain and snow, but also eliminate overwintering pests under the trees. Twists in the winter and spring, and the depth of the turning is 10-20cm. Third, reasonable pruning jujube tree branches within the tree branches densely tended to result in fewer results and poor quality. The crown should be adjusted by pruning. The following points should be trimmed: 1. Cut off the branches with low or no fruit ability, and remove the cross branches, dense branches, overlapping branches and thin and weak branches to facilitate ventilation. For the leggy branches, the length of the cut can be determined depending on the size of the space. For a large space, there is a long-established perennial leg that can be cultivated to form a skeleton branch. 2. All sawed dead stems, branches and branches of pests and diseases, sawing should be sawn to the living branches as much as possible. The sawing mouth should be flattened and painted and mixed in order to avoid continued dry rot. 3, on the backbone of the branches of the 1 and 2 years of development of branches, can be cut according to the size of space, leaving the remaining 4 - 6 branches, cultured into a robust result of Zhizu. 4, the aging of the backbone should be retracted 1/3 - 1/2, the diameter of the retracted site should not exceed 5cm, cut up under the need to leave up the dormant buds or the results of the mother branch; the results of aging Branches should be fully retracted and sparse; for more complete branches can be cut 1/2 or 1/3, triggering new branches. 5. For trees with severe aging, stop the tree maintenance. During the period of suspension, it is necessary to cooperate with the measures of updating and pruning branches, increasing fertilizing water, and so on, so as to accelerate the restoration of the tree potential. 4. Elimination of jujube pests 1. Curing old jujube bark. The scraped bark is scraped off before being frozen and burned or buried deeply to eliminate the source of overwintering insects. 2. Thoroughly remove the turtle wax. Jujube tree turtle wax (commonly known as tree lice) is one of the major pests of jujube trees. Because jujube is a fertilized female on the 1--2 year old branch of wintering, it should seize the opportunity of the winter, branch brushing. 3. When turning the tree tray in winter, pay attention to picking up the overwintering insects and destroying the insects in the soil under the trees. China Agricultural Network Editor