In order to control temperature as the center, strengthening the management of winter vegetables

One, the influence of the cold weather of PengCai in late December to next February are the coldest months, fruits and vegetables, melons are thermophilic medium-sized vegetables, the required temperature for 25 to 28 ℃ during the day, night is 15 ~ 18 ℃, the cold the weather is very bad tents planted tomato, melon growth and development, the winter planting should be regular agricultural greenhouse glass rod thermometer if not strengthen the freeze protection measures, tends to cause widespread freezing injury. Second, the winter vegetables are currently open, vegetables are hardy vegetables, cabbage, broccoli, spinach, celery, etc. Because the leaf vegetables has resistance to cold biological features, monthly average temperature in 3 ~ 5 ℃, a lot of observing agricultural vegetable greenhouses glass rod thermometer readings, all can safe wintering, are less likely to cause severe cold injury. And shed planted mainly in tomato fruit and melons, vegetables such as tomato, eggplant, pepper, cucumber, XiTianGua, etc. From PengCai growth period, also is uneven, such as tomato, eggplant, cucumber, some farmers transplanting time is earlier, has entered the blossom period; Some farmers transplanting time later, for the early flowering, the late for seedling, transplanting period. In view of the cold weather conditions and shed planted in tomato fruit, melons of thermophilic not hardy biological characteristics, must strengthen the freeze protection measures at present. Three, vegetables farming arrangement, the temperature parameters in agricultural greenhouse glass rod thermometer readings shall be 1, collecting vegetables: the field planting vegetables, spinach, celery and lettuce can be partial recovery, supply market. 2, continue to transplanting shed planted vegetables, some farmers in order to ensure safe wintering trellised tomato and eggplant seedlings, the plants still in greenhouses, should lose no time in January, in the middle of transplanting to shelter. 3, ensure the safety of the winter PengCai wintering, the following comprehensive freeze protection measures should be taken: ( 1) Multilayer covered: in January, in order to ensure the security of the winter tents plant winter, multilayer cover should be adopted. Plastic mulching, steel pipe shed and tent on the set of shed, shed again affix a non-woven, shed to hang the thermometer, observe shed temperature changes, the barn temperature control in 25 - during the day Control in 15-30 ℃, night 18 ℃, at the same time, adhere to the early jie ( 8:30 am - 9) And late cover ( 3:30 p. m. - ) Daily management of greenhouse, make shed ventilation. （ 2) Increasing organic fertilizer application, controlling nitrogen fertilizer, spraying on the leaf fertilizer: winter and spring PengCai must not partial nitrogen, available pig dung or insulation farmyard manure or we topdressing under, in order to improve the cold stress resistance of plant, and foliar spray ShiYun moss, potassium dihydrogen phosphate, love to receive such as nutrient solution, in order to improve the plant cold hardiness. （ 3) Surface covered with insulation: at low temperature, frost, before the arrival of straw, rice straw, hay coverage available on PengCai beds and vegetables, can reduce cold mechanical damage, mu with 100 kg, will dilute scare, must not cover the all vegetables, to avoid affect the photosynthesis, conditional place, can be in inter-row ash plant ash or shell. Also have insulation anti-freezing effect.