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1. Fertilizers for Spring Fertilizer Fertilizers should be applied in three separate batches. The first time in late March, 2000 to 2500 kilograms of manure per acre before germination of the mulberry tree, commonly known as “jealousy fertilizerâ€; the second time, fertilizer should be topped up. 4 From the end of May to the beginning of May, about 30 kg of standardized fertilizer is applied per acre. In the third time, in early May and mid-May, nitrogen is sprayed on the leaves with 0.5% urea solution, which facilitates the absorption of mulberry leaves and increases the thickness of the leaves. . According to the pilot survey, the structure of mulberry trees is the same. The mulberry gardens with less applied fertilizer or less fertilized fertilizers have grown by 27.6% and 14.2% per acre respectively. The mulberry garden application of spring fertilizer not only increases the yield of spring leaves, but also extends the fertilizer effect to summer and autumn, which can increase the germination rate of mulberry trees after summer harvest, promote the growth of foliage and increase the yield of summer and autumn leaves.
2. Cultivated and mulberry mulberry gardens are fertilized by mulberry sericulture and mulberry farms for many times throughout the year. Artificial trampling on the soil causes compaction, which affects soil water, fertilizer, and gas traits, and is not conducive to mulberry root activity and the absorption of fertilizer and water. Therefore, In late March, the mulberry field will be cultivated and weeded, which will loosen the soil, reduce water evaporation, reduce drought, increase soil fertility and eliminate weeds. According to a comparative test, after weeding in the spring mulberry field, it was investigated until mid-May. There were only 2.4 weeds per square meter per square meter, and 39.8 per square meter without weeding. The average weeding per plant yielded 37.6 grams of mulberry leaves per plant. Mulberry grows 34.6 kilograms per mu.
3. Before repairing the tree-shaped mulberry, the dry piles, dead branches, pests and branches, and thin and weak branches on the mulberry tree should be pruned to facilitate neat tree structure, concentrate nutrients, increase tree vigor, and reduce pest damage. The pruned stubble, dead branches, and pests and branches that have been pruned are burned away from the mulberry fields to prevent the mulberry diseases and pests from spreading.
4. Prevention and control of insect pests The main pests in spring mulberry fields are mulberry insects, mulberry scaleworms and mulberry caterpillars. Mulberry worms started from the early spring and used adult food to harm the mulberry sprouts. Sometimes they also killed the petioles, leaves and the base of the shoots, affecting the mulberry germination rate. M. ulmoides is the most harmful to the overwintering larvae, and all the instar larvae later eat mulberry leaves. The mulberry caterpillar bore insects in mid-April and began to harm the mulberry sprouts. To prevent and control the above pests, in addition to timely pruning and artificial capture of mulberry, chemical control should be taken: before the mulberry sprouts, acetochlor 3000 times solution, or kill 1000 to 1500 times the spruce pine tree trunk, branch, kill Mulberry insects; using 2000 times liquid of trichlorfon emulsion, or 80% of dichlorvos emulsion 1500 to 2000 times liquid medicine to kill mulberry pests, mulberry caterpillars and other insect pests.
5. In the early spring of Qingcang Li, there is more rain, and the mulberry root system is vulnerable to waterlogging, causing anaerobic respiration and affecting the normal growth of mulberry trees. Therefore, the mulberry garden ditch should be cleaned up in time to ensure that the shallow ditch can communicate with each other. The unripe forest mulberry garden, the root system of mulberry is still underdeveloped, and the resistance to cockroaches is weak. It is also necessary to pay attention to the mulberry garden drainage.
6. The physicochemical effects of timely drought-resistance mulberry trees all depend on soil moisture. The most suitable soil moisture for mulberry growth is 70-80% of the maximum water holding capacity. In this range, mulberry grows vigorously, branches are long, and the leaf shape is large. Late hardening, good leaf quality, high leaf yield. The more high-yielding mulberry gardens, the more water they need during the growing season, and more attention should be paid to timely drought resistance. According to a comparative test, under the condition of equal fertilization management, in the event of drought in mid-May, the drought-tolerant mulberry field yielded more than 15% of mulberry leaves.
Mulberry Park spring management technology
The spring climate is suitable, the leaf quality is good, the pathogen is few, and it is easy to win the high yield of silkworm cocoon. Technical points of spring mulberry management: