The main watermelon cultivars in the cold shed are Black Beauty and Jinmei. These two varieties have strong growth potential, high yield, and good disease resistance. However, the seeds are expensive. The seed cost per shed needs about 260 yuan, and the stock of rootstock is about 10 yuan. Grafting Nursery labor costs about 50 yuan, a total of about 320 yuan. If the Xiawei watermelon is cut and regenerated, it will save the cost, and the relative efficiency will be 320 yuan per shed.
First, cutting vines before the technical management
1, choose a suitable variety
The regenerated watermelon varieties must have the characteristics of strong growth potential, strong branching ability, strong fruit setting capacity, strong disease resistance, good quality, and high yield, etc. Cold shed cultivation generally uses precocious black beauty, golden beauty, and golden age. Children, Jingxin No. 1, Jingxin No. 2 and other varieties.
2, re-base fertilizer
The amount of organic fertilizer used in basal fertilizer is 50% more than that of normal cultivation, and the long-term and quick-acting fertilizers must be used in conjunction to meet the needs of regeneration and growth of watermelon. In general, 5000 kg of organic fertilizer is applied per 667 square meters, 150 kg of special fertilizer for watermelon or 15 kg of compound fertilizer, 10 kg of diammonium, and 10 kg of potassium sulfate. Use stratified deep fertilization, pay attention to evenly mixed soil and avoid burning seedlings.
Second, cutting vines technical points
1, cutting time
Before the harvest, the vines can be cut and harvested around the beginning of July.
2, cutting method
After harvesting the first melon, leave the vines of the old vines and the bases of the side vines of the watermelon vines with 3-5 leaves, and cut off the rest. The cut stems and leaves were all cleared out of weeds. After mulching, watering and fertilizing were immediately carried out. After 3-5 days, the latent buds in the base sprouted new buds and spreaded in 7-10 days.
Third, the management points after cutting
1. Strengthen fertilizer and water management
After the vines are cut, they are immediately topdressed with water, prompting them to germinate new shoots. Topdressing with nitrogenous fertilizers will be followed by 10-15kg of urea per 667m2. The new shoots will be harvested after about 10d and fertilizer will be applied every 667m2. 10kg, into the flowering stage, spraying 0.3% potassium dihydrogen phosphate on the leaves, spraying once every 5 days, prompting the opening of female flowers. About 7 days after the female flower is set, when the young melon grows to the size of the egg, immediately apply the fertilizer and water it for 3-5 days. About 25 days after fruit set, the fruit should be strictly controlled watering during ripening period to increase the sugar content of watermelon and prevent cracking of melon.
2, density
Before cutting vines, we must look at the growth of the plants. If the growing trend can maintain the original density, if the amount of basal fertilizer is insufficient for the early period and the plants grow poorly, we must reduce the density, that is, we must remove the septum and apply fertilizer in time so that we can ensure that the plants are cut. Strong growth, ensure the rate of results and increase the weight of the individual.
3, pruning pressure vine
After the vine was cut, three branches with robust growth and no pests were selected from the branches of the new ones, and the rest were removed. When the new branch grows to 40-50cm, it is crushed and leaves fruit at 8-12 leaves per vine, and then leaves the fruit according to the characteristics of the variety. At the same time, pests and diseases should be promptly prevented before the new vine grows. Spray 3-5 times with chlormethrin or dimethoate emulsion to control locusts. Spray foliar fertilizers such as Yunda 120 to ensure vine spreading, flowering and fruit setting. Need for growth and development and increase sugar content. At the same time, sufficient water supply should be ensured during the growth period.
4, timely harvest
It takes about 30-35 days to reach the harvest from the new one. It should be harvested in time, and in the morning market, the third crop should be sown.
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