Autumn and winter jujube tree management

1. After clearing the leaves in the clear garden before the winter, the leaves and leaves of the jujube garden must be cleaned in time and thoroughly burned. This can reduce the source of bacteria and insects. This management technology has relatively good results in reducing damage caused by diseases such as jujube leaf spot disease, jujube leaf and leaf spot disease, black spot disease of jujube leaf, date rust disease, and green thorn moth.

2. Deeply turning the soil to implement the jujube intercropping of jujube grain intercropping, deep turning of the soil between plant spacing and under the tree; if the intercropping of grains is not implemented, the whole garden should be plowed, especially the soil within the projected area under the canopy must be For deep turning, it is usually 10 to 50 cm deep. Deep plowing can reduce the damage of 20 pests such as Zaojiao, Jujube, Mosquito, Red spider and P.

Third, the autumn Shiji should not be late. Basal fertilizer should be organic fertilizer as good, according to the production of 50 kg of fresh dates apply 0.8 kg of nitrogen, phosphorus 1.0 kg, potassium 0.7 kg ratio of basal fertilizer.

Fourth, winter trim

1. The initial jujube tree trim. Should be based on sparse, retractive, short cut and cultivation, in accordance with the "four stay", "five do not stay" principle of pruning. "Four stay" is: stay in the peripheral jujube; stay in the backbone of the jujube head; stay full growth and development of the jujube head; stay with a large number of secondary branches and jujube stocks, strong ability of the jujube head In this way, the canopy can be continuously expanded to increase the area of ​​results year by year, and the yield can be increased. "Five no leaves" is: no hanging branches and weak branches are left; slender branches and overlapped branches are not left thin; pests and dry branches are not left; Improperly positioned and unpractical leggy branches; leaving no vertices, cross branches, and branches and leggy branches. Pendulous branches and perennial branches, retracted to strong growth buds. The second branch under the cut should be cut off from the base. The jujube head that does not make the extension branch of the main branch and the head branch of the main branch that does not continue to be extended after a short period of three years or more. For bald branches, gradually retract and renew.

2. Jujube tree pruning in full fruit period. Pruning should not be heavy during this period, especially for small varieties such as gold silk jujube and seedless jujube. Attention should be paid to light cuts. Under general fertilizer and water management conditions, each fruit tree should retain 2,000 to 3,000 senile jujube stocks, and 15 to 25 kg of dried jujube. The high-yielding jujube tree with good fertilizer and water conditions and high management level can retain the jujube stock 4000. ~ 5000 strains produce dry dates 30 to 50 kilograms.

3. The old date tree's updated trim. With the increase of the age, the old jujube tree has gradually weakened its growth potential, resulting in a decline in its ability to produce a large number of secondary branches and jujube stocks. This old tree needs to be updated and trimmed to rejuvenate the tree. The degree of update depends on the number of valid dates. When the jujube tree is valid on the jujube tree (ie live jujube stock) is only 300 to 500, it should be re-updated, that is, select the outgrowth of the stump in the backbone branches, saw the total length of the backbone branches 2/3 to 1 /2, stop reopening for 2 to 3 years. When the effective jujube stocks are between 500 and 1000, they can be updated in medium time, sawing off 1/3 to 1/4 of the total length of the stems, and stopping the armor for 1 to 2 years. When the effective date stocks are between 1000 and 1500, they can be lightly renewed, and the total length of the stem branches can be sawed off from 1/5 to 1/7, as usual. The jujube tree is updated once to facilitate the formation of a new canopy.

Five, jujube tree scraping skin scraped off the old jujube tree in winter, you can eliminate the pests in the tree slit wintering, reduce the source of insects. When scraping the bark, the soil around the trunk is flattened and covered with plastic sheeting. The scraped bark is collected and burned.

Six, prevention and treatment of pests before winter or early spring before germination, generally spray a 3 ~ 5 Baume degrees of lime sulfur agent, the prevention and treatment of overwintering bacteria, pests have a good effect. The jujube garden with serious wax scale insects is also good in winter. In addition, after freezing, spray water on the branches. When the water freezes, beat the branches with a pole and the waxy wax scale insects will fall off with the ice.

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