1. Nursery
(1) Greenhouse germination: The use of greenhouse germination, early development and prolonged growth is a major technical measure for refining, strong seedlings, high yield, high yield and early maturity. The seed potatoes are removed from the greenhouse 20 to 25 days before sowing, and they are sun-dried in the greenhouse for 5 to 7 days. The seeded potato that has been trapped is budded and budded in the greenhouse after dicing.
(2) Sowing at the right time: The greenhouse where the potato is planted is preferably an old shed, and it is an autumn land preparation. Do not continue to work with the Solanaceae or Cruciferous crops. When the temperature of 10 cm soil layer in the shed is stable at 7 °C, the temperature in the shed is stable at 5 °C, usually around March 20.
2. Post-plant management
(1) Reasonable fertilization: Fertilizer should be applied once. Potato fertilizer is large, fertilization can be taken once to apply the base fertilizer is best, try not to topdress or less top dressing, and to do organic fertilizer and fertilizer combined application. Generally 667 square meters of organic fertilizer 2000 ~ 3000 kg, 20 kg of potassium fertilizer, 15 kg of phosphate fertilizer, 5 kg of nitrogen fertilizer.
(2) Strengthen management: When the seedlings are arched to the top film, the seedlings should be placed in time, and the holes should be sealed with wet soil to make the volume of the ridges warm. Sprinkle water once after the seedlings are out, not too much, so that the soil is kept loose and moist. This period of management is mainly to promote the ground, promote the ground floor, mainly to improve the ground temperature, promote root development, in order to reach the deep roots, can be used to deepen the middle ditch. The management of the hair growth stage is mainly based on ventilation and cooling. When the temperature in the shed exceeds 25 °C, the air is released, from small to large, so that the ground temperature is maintained at 16-18 °C, so that the stem is thick and erect. This period of management should pay attention to ventilation and control of moisture. The management of sweet potato is mainly to control the growth of the ground, control the plant length, and prolong the potato growth period. Generally, the shed temperature is controlled at 20-22 °C, and the ground temperature is controlled at 16-18 °C. The plant growth can be controlled by chlormequat and swell. When the plant is budded, the film is peeled off and covered with soil. The management during the whole growth period is preferably no more than 1 cm/day.
3. reward
Generally, it is harvested from 55 to 60 days after sowing, that is, around May 25, depending on the condition of the crop, it can be harvested in stages, or it can be harvested at one time.
Pe Deodorant,Pe Use Deodorant,Pe Masterbatch Deodorant,Pe Odors Removal Agent
Ningbo Jiahe New Materials Technology Co.,ltd , https://www.cnjhchem.com