1, drought, lack of fertilizer and water, the contradiction between vegetative growth and reproductive growth, lead to nutrient competition, so that fruits can not get enough water and nutrients, and finally young fruits turn yellow and fall off.
2. After the second year, the mulberry with long fruit grows vigorously and the water content is too high, which will cause the branches and leaves to grow vigorously and compete with the fruit for nutrition, resulting in fruit drop (a small amount of fruit drop).
3. Too much and too concentrated fertilization makes the local fertilizer concentration too high, which is especially serious.
These problems may be the main reasons for fruit loss.
When mulberry leaves fall in Taiwan Province Province, the following foliar fertilizers can be used as topdressing to promote growth:
1, Plant Dynamics 2003 1000 times foliar spraying.
2. 0. 15% natural brassinolide EC 6000- 10000 times foliar spraying.
3. The eugenol 1500-3000 times (transplanting crops, fertilizer damage, freezing damage, waterlogging damage, strong roots and strong seedlings, prevention and control use 1500 times)
4, green wind 95 600 times foliar spray
5, Jinbang 1 Phytobiotics 500 times foliar spraying.
Pest control:
The main diseases that harm fruit mulberry are brown spot, anthracnose and powdery mildew. The main pests are inchworm, caterpillar, locust, Apriona germari and so on. After burning the trimmed dead leaves every winter, combine with fertilization and bury them deeply; Protect the whole branch with 200 times solution of high fat film yield increasing agent before germination; Spraying 800 times of 75% chlorothalonil mixed with 300 times of high-fat film yield-increasing agent in 10- 15 days to control caterpillars and brown spot. If it is found that Apriona germari harms the branches, the larvae can be killed by injecting drugs into the holes or stuffing them with cotton swabs, and the adults can be captured artificially.
Second, the planting technology:
Planting: cut off the seedlings at a distance of 30 cm from the ground and fix the stems. Generally, each plant can sprout 6-8 new buds in the same year. When the new branch grows to 20 cm, pinch off the top to promote branching. Tree planting is mainly in the current year, and it is not recommended to popularize the results in large quantities. After picking one crop of fruit, immediately cut off the fruiting mother branch, leave 2-3 buds to promote its germination as the next crop of fruiting mother branch, and apply quick-acting fertilizer or urea as soon as possible to promote the germination and growth of its flower buds, thus creating conditions for the high yield of the next crop of fruit mulberry.
After harvesting the last autumn fruit every autumn, all localities should ditch in the middle of the planting line and reapply the base fertilizer for the coming year. This time, it is necessary to re-apply farm organic fertilizer and human and animal manure, and supplement 50 kilograms of compound fertilizer per mu to promote flower bud differentiation and lay the foundation for high yield again in the coming year. In order to improve the yield and quality, potassium diammonium phosphate can also be sprayed on the leaves from the early flowering stage to the young fruit stage, which can significantly increase the sugar content and promote early maturity, stable production and yield increase.
Third, output:
Mulberries yield about 5,000 Jin per mu in the north of Huaihe River, and 5-6 times a year in the south of Yangtze River, especially in the south of Pearl River Basin. The cumulative yield per mu can reach more than 8000 kg, and the yield per plant is more than 200-300 kg.
Key points of extended data management technology
After planting, cut the seedlings 30 cm from the ground, and each plant can sprout 6-8 new shoots in the same year. When the new branch grows to 20 cm, pinch off the top to promote branching. Tree planting is mainly in the current year, and it is not recommended to popularize the results in large quantities. After picking one crop of fruit, immediately cut off the fruiting mother branch, leave 2-3 buds to promote its germination as the next crop of fruiting mother branch, and apply quick-acting fertilizer or urea as soon as possible to promote the germination and growth of its flower buds, thus creating conditions for the high yield of the next crop of fruit mulberry. After harvesting the last autumn fruit every autumn, all localities should ditch in the middle of the planting line and reapply the base fertilizer for the coming year. This time, it is necessary to re-apply farm organic fertilizer and human and animal manure, and supplement 50 kilograms of compound fertilizer per mu to promote flower bud differentiation and lay the foundation for high yield again in the coming year.
In order to improve the yield and quality, potassium diammonium phosphate can also be sprayed on the leaves from the early flowering stage to the young fruit stage, which can significantly increase the sugar content and promote early maturity, stable production and yield increase.
References:
Baidu Encyclopedia Changguosang in Taiwan Province Province