The Key Technology of Postharvest Management in Xingyuan

After apricots have been harvested, there is a long period of growth from autumnal leaves. This is the critical period of nutrient accumulation and flower bud differentiation. The quality of post-harvest management will directly affect the wintering and leap year of apricot trees.

First, timely fertilization. After apricot trees are harvested, they are ploughed and aerobically combined with apricots for fertilization. For trees with a large number of results and large tree nutrient consumption, early application and re-application of organic fertilizer is required. Generally, every 667m2 is topped with 3,000 kg of high-quality organic fertilizer, 50-100 kg of available nitrogen fertilizer, or 30-50 kg of urea, and appropriate amount of phosphorus and potassium fertilizer. In addition, spray spraying should be carried out. In this way, the level of nutrients stored in the tree can be increased, the robustness of the apricot tree after harvest can be maintained, and flower bud differentiation can be promoted to ensure the output of the following year. For apricot cultivars with different mature stages and different flower bud differentiation periods, fertilization at different times should be carried out. Early maturity apricot varieties should be fertilized in advance to ensure that the flower buds are full the following year and the tree has normal nutrient accumulation.

Second, do a good job in summer cut. Apricot trees must be pruned in summer after harvesting to cut dry branches, branches and branches, and the results should be retracted when the result is significantly weak and sagging. In the autumn tube, the result tree was mainly sparse, and the pruning method was mainly adopted to draw large branches, reduce the height of the trees, and shorten the cuttings, so as to promote the lower branches and inner branches to extract new branches to form short fruit branches and bouquet-like fruit branches. When the leggy branches are initiated in the canopy, there are space for growth, such as topping, twisting, branching, pulling branches, etc., to control vegetative growth, and to use space for multiple results. For those who do not have space for growth, mopping the branches, sick branches, and dense branches, they must be removed in time.

Third, timely irrigation. Because the apricot tree is not resistant to pods, its roots can not be soaked for a long time, and it is easy to injure the roots when it is soaked; when the rainy season comes, if the apricots have accumulated water, they should be promptly discharged to prevent apricot trees from feeling sick due to lice. Autumn is the late period of vegetative growth. Reasonable irrigation is conducive to the manufacture and accumulation of nutrients and is conducive to the formation of flower buds. If the autumn drought is severe, it can be watered from August to September.

Fourth, spray fertilizer. For apricot trees with weaker growth or fruit filling, they can start after the fruit is harvested and spray fertilizer on the leaves to ensure the nutrients needed for flower bud differentiation. Foliar spraying began from late June, spraying 0.2%~0.4% urea and 0.3% potassium dihydrogen phosphate, spraying once every 10 days or so, spraying 5~6 times continuously.

Fifth, spray regulators. Apricot can be sprayed with 1 to 2 500 mg/kg of paclobutrazol solution and mixed with 0.3% urea solution or 0.3% potassium dihydrogen phosphate solution.

Six, deep ploughing expansion. Deep plowing in autumn is performed before the soil is frozen in September and the depth is about 20 cm. Deep plowing can be carried out on a single plant. The ring canopies can be dug in the ground on the vertical edge of the canopy (don't cut off the rough roots, and the topsoil and the subsoil can be stacked separately). You can also dig the ditch between the rows with a depth of about 60 cm. When filling back the soil, mix topsoil with rotten leaves, weeds, dry rods, biogas residue, or other farmyard fertilizers and place them in the lower half of the ditch. The original subsoil can be placed in the upper half of the ditch.

Seven, control pests. For harvested apricot trees, timely spraying of extermination and killing dicamba, trichlormethanosine, carbendazim or carbendazim and other pesticides can prevent pests and diseases to protect the leaves. Increase the accumulation of nutrients in the tree. In addition, adding 3% urea solution is more beneficial to the tree. The apricots should be cleaned and the fruit should be cleaned early (should avoid burying them under the apricot tree) to prevent the bacteria from multiplying.

Eight, poured over winter water. In the early winter, it is best to pour apricot trees once before the soil is frozen to ensure safe apricot wintering. The amount of water depends on the degree of drought and the age of the trees.

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