The beginning of spring has passed and spring ploughing is imminent. At present, the prevention and control of the new crown pneumonia epidemic is in a critical period. The epidemic prevention cannot be relaxed, and spring ploughing cannot be delayed. Recently, Chang Zongtang, a researcher at the Department of Facility Agricultural Science and Engineering, College of Horticulture, Northwest Agriculture and Forestry University, told reporters that the large area of ​​watermelon cultivation in greenhouses has certain advantages in early maturity cultivation, and it is generally planted in March. At present, the grower must do all the preparations for the early spring watermelon planting in the greenhouse and wait for the proper planting. Disclaimer: Some articles on this website are transferred from the Internet. If third party legal rights are involved, please inform this website to deal with them. phone Synephrine,Accelerate Fat Metabolism,Diet Drugs And Foods,4-98% Hplc Citrus Extract MIANYANG DI'AO PHARMACEUTICAL CO.,LTD , https://www.diaopharma.com
Timely planting determines the time of planting according to the requirements of watermelons for environmental conditions and weather conditions. After training, watermelon seedlings reach 3 leaves 1 heart to 4 leaves 1 heart; the ground temperature in the greenhouse is stable above 13 ° C; choose "cold tail and warm head" weather, and set up on sunny days more than 3 days after planting.
Early spring watermelon cultivation in the greenhouse in Guanzhong, Shaanxi. Three-film mulch cultivation in the shed was planted around mid-late February, and single-film mulch cultivation was planted around early March. South and North Shaanxi can be planted earlier or later.
Cultivate strong seedlings 1. Determine the sowing date: The seedling breeding center or grower self-cultivates the seedlings, and the seedlings are estimated 35 to 40 days in advance based on the watermelon planting period in the greenhouse.
2. Grafting seedlings: Watermelon is planted in multiple stubbles in greenhouses. In order to improve disease resistance and low temperature resistance, watermelon seedlings must be grafted for root replacement. Seedlings are grown in solar greenhouses or greenhouses, and seedbeds are laid with geothermal lines, 80-100W ∕ m2; 50-60 hole tray seedlings or nutrient bowls are used for seedling cultivation; seeds are soaked in warm water (constant temperature) at 55 ° C for 15 minutes to disinfect. Seedling management with appropriate water and sufficient light to increase the temperature difference between day and night to prevent seedlings from growing too long.
3. Strengthen seedling cultivation: Start seedling cultivation 7 days before planting to improve the stress resistance of the seedlings, so as to adapt to the environment after planting, in order to slow down the seedlings. Plug seedlings, reduce the amount of water spray, reasonable ventilation, control the temperature during the day at 20 ~ 25 ℃, and gradually reduce the temperature at night from 15 ℃ to 10 ℃ for seedling cultivation, limited to mild wilting.
Shed preparation 1. Early construction of sheds: New sheds and old sheds should be repaired 30 days before planting. The newly-built greenhouse runs north to south, with a solid skeleton, and the height-span ratio is preferably 0.25 to 0.3.
2. Fertilization and ridge: 20 days before planting, clean up the stubbles and leaves, medium-fertile greenhouse, and apply fully decomposed chicken manure or biological organic fertilizer. Then the shed was closed, and the high-temperature shack was carried out.
3. Closed shack: Closed shack can further decompose the organic matter in the soil and avoid the fermentation and root burning of organic fertilizer; it can kill the germs and pests in the greenhouse space; the heat storage of the soil increases the ground temperature, which is beneficial to the early planting and slowing down after planting. seedling. About 15 days before planting, after fertilizing and preparing the land, a maintenance drip irrigation facility was installed to cover the film. At the same time, the middle and small sheds in the big shed are set up, and then the shed is closed and sealed for 10 to 15 days. During the shack, the multi-layer covering films such as the middle shed and the small shed in the big shed are lifted in the morning and evening, so as to improve the temperature and heat preservation, soil heat storage, and increase ground temperature.