The long-term tree fertilization before and after fruit picking (autumn shoot fertilizer) is one of the most important cultivation measures for cultivating the strong shoots of autumn shoots, which is directly related to the production of longan in the following year.
Production should pay great attention to the fertilization work. For plants with more fruiting and poorer tree vigor, the autumn seedlings can be applied 15-20 days before fruit harvesting. Moderate fruiting plants can be applied after fruit harvesting. Into. In the autumn, it is better to use high-quality organic fertilizers (eg chicken gizzards, pig dung, bran, etc.) and appropriate amount of fast-acting fertilizers.
In order to save manpower for fertilization, the autumn fat can be concentrated in one application (ie, applied in mid-August). The amount of fertilizer can be combined with its own ability. Fertilizer is applied more often, and less often is less, with a crown diameter of 5-6. Rice or 50 kg planted fruit as the standard, the amount of fertilizer per mu should not be less than 30 kg of chicken manure or peanut bran 4-5 kg, 3-4 kg of superphosphate, 1 kg of potassium chloride, 1 kg of urea or sulfuric acid Ammonium 2-3 kg, or peanut bran 2 kg, NPK ratio 15:15:15 compound fertilizer 2-3 kg, potassium nitrate 1 kg, urea 1 kg or ammonium sulfate 2-3 kg.
Fertilizer should be based on the different growth conditions of the plant, a more reasonable grasp of a reasonable ratio of nitrogen and phosphorus potassium, such as the results of many plants with weak growth, should increase the application of available nitrogen fertilizer, in order to promote the growth of new roots and shoots sprouting, Plants with little or no fruiting results have strong growth potential. They can increase the use of phosphorus and potassium fertilizers, reduce the amount of nitrogen fertilizers appropriately, and avoid shoot shooters. For the orchards with more adequate fertilizer, they can apply autumn shoot fertilizer in late September. It is to promote the growth of the second autumn shoots, and each plant can be applied 1-2 kg of compound fertilizer. This time fertilization can pay attention to control of nitrogen fertilizer, otherwise it will make the last autumn shoots long, not conducive to flowering results. In October-November, it is generally not appropriate to re-fertilize and avoid promoting winter shoots.
When fertilizing, you should also master the correct fertilization method. There are several main methods for fertilizing the tree:
1. Strip canal fertilization: Open the ditch near the canopy drip line, or open the ditch between lines or between plants. The size of the ditch can be determined according to the amount of fertilizer: the fertilizer can be larger and the ditch can be smaller. . The next time fertilization can be rotated, it will move outwards year by year, and the longan root system will be drawn outwards.
2, radiation ravine fertilization: The trunk as the center, in the 60-80 cm away from the trunk, dig out 6-8 radiation groove, depth 20-30 cm, the fertilizer applied to the ditch. Change the location of the fertilization ditch every other year or every other time to increase the absorption surface of the root system.
3, trench fertilizer: the fertilizer is very close planting orchard, can be used trench fertilizer method, the specific approach is to dig trenches between the lines or between rows, deep 50-60 cm, width 30-40 cm, the fertilizer applied to the ditch Then cover the soil. This method consumes a lot of manpower and fertilizer, but the effect is obvious.
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Sodium Erythorbate and Erythorbic Acid is a food additive used predominantly in meats, poultry, and soft drinks. Chemically, it is the sodium salt of erythorbic acid. When used in processed meat such as hot dogs and beef sticks, it increases the rate at which nitrite reduces to nitric oxide, thus facilitating a faster cure and retaining the pink coloring. As an antioxidant structurally related to vitamin C, it helps improve flavor stability and prevents the formation of carcinogenic nitrosamines. The use of erythorbic acid and sodium erythorbate as a food preservative has increased greatly since the U.S. Food and Drug Administration banned the use of sulfites as preservatives in foods intended to be eaten fresh (such as ingredients for fresh salads) and as food processors have responded to the fact that some people are allergic to sulfites. It can also be found in bologna, and is occasionally used in beverages, baked goods, and potato salad.
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