What should we pay attention to when planting zucchini in winter and spring?

What should we pay attention to when planting zucchini in winter and spring? Please introduce the following aspects for planting zucchini in winter and spring: 1. To select improved varieties of spring zucchini, we should choose varieties with low temperature tolerance, early maturity, high yield and disease resistance, such as flower and leaf zucchini, Zaoqing generation, Yinqing generation, Golden Coral, Qishan 2, Zhangxuan 1, Heimei and so on. The seedlings and cultivation were carried out in the solar greenhouse, and the seedlings were raised in early December, sowed directly in the seedbed or raised in a nutrient bowl. two。 The growth period of zucchini in winter and spring is relatively short, and the amount of base fertilizer is less than that in overwintering. Every 667 square meters of land, 50.8 cubic meters of high-quality farm manure and 50,70kg of calcium superphosphate are applied. The specific operation of soil preparation is the same as that of overwintering stubble. It is usually planted in large and small rows and high ridges. Large line spacing of 80 cm, small line spacing of 55 cm and 60 cm, and a ridge with a bottom width of 30 cm and a height of 25 cm on the predetermined line spacing. Build a walkway with a height of 25 centimeters between 80cm rows. Open holes and plant on the ridge, plant 45 cm apart, pour planting water one by one, and seal the holes. 3. When promoting slow seedling and slow seedling, irrigate fixed planting water hole by hole to prevent excessive amount of water from leading to the decrease of ground temperature. Strengthen the middle tillage after slowing down the seedlings, once every 3-4 days, 3-4 times in a row. The depth of intertillage can be up to 10 cm, but the soil brought during planting should not be hurt. After planting, before setting melons, we should pay attention to increase the temperature of solar greenhouse and promote slow seedling and growth. Ploughing and loosening the soil, promoting the growth of roots, and laying the foundation for melon. Planting to slow seedling, after 5-7 days, generally not let out, add a small arch shed at night, do everything possible to raise the temperature. The high temperature can be maintained up to 25: 30 ℃ or even 32 ℃ during the day, and the low temperature at night is not less than 15: 18 ℃. After slowing down the seedlings, the temperature decreased slightly, keeping 22: 25 ℃ in the daytime and 15 ℃ at night. 4. After temperature control, the temperature was kept at 25: 30 ℃ in daytime and 18: 20 ℃ at night to promote seedling retardation. After slowing down the seedlings, the temperature was lowered properly, 20: 25 ℃ in the daytime and 12: 16 ℃ at night to prevent the seedlings from overgrowing. After setting melon, 25: 28 ℃ in daytime and 15: 18 ℃ at night to promote plant growth. Under the condition of low temperature and low light in winter, the net photosynthetic rate should be kept at 23: 25 ℃ in the daytime and 10: 12 ℃ at night in order to improve the net photosynthetic rate under low light. The temperature rises gradually after the beginning of spring in the following year, so it should be ventilated in time to avoid high temperature and humidity. 5. Fertilizing and watering zucchini root melon begins to expand and grow. When the melon grows 6 to 10 centimeters long, the first water begins to be irrigated, and then the land is watered as soon as it dries. The root melon will be harvested in time when it weighs about 0.25 kg. At the same time, it is necessary to prevent the high temperature at night so as to achieve the purpose of controlling seedling and promoting melon. Topdressing and watering, organic fertilizer and chemical fertilizer are carried out alternately, that is, organic fertilizer is applied with water-clear water, and cake fertilizer is applied alternately with water. Each time 667 square meters were topdressing 20 kg of nitrogen fertilizer. In the later stage of melon plant senescence, properly reduce topdressing, watering is the same as the full melon stage, and the land is irrigated as soon as it is dry. 6. The first flower of artificially pollinated zucchini is usually female, and the second flower is usually male. Male and female flowers usually bloom at 4: 6 am and 9: 11 am, which is also the best time for pollination. When pollinating, you should first check whether the male flower has produced pollen, and you can wipe the stamens of the male flower with your fingers and find that there is yellow powder on the fingertips, that is, mature pollen, then take off the male flower, remove the petals, and gently rub the stigma at the female flower to make the stigma pollinated evenly, otherwise it is easy to grow into a deformed melon. 7. Hormone plastering flowers in the air humidity is relatively high or there are no male flowers in the shed, and the leaf axils of each vine give birth to female flowers, that is, a melon per leaf. At this point, you need to use hormones to deal with sitting melons. Now commonly used melons with hormones, mainly 2Jing 4murd or Baoguoning and so on. Use hormone to smear young melon, choose sunny day 9: 10 am to smear. Specific method: after dipping medicine with a brush, a melon is dipped, the first stroke is quickly daubed on the stigma, and the second stroke is gently daubed on the young melon body from the tail to the pedicel direction, that is, the whole process is completed. In addition, we should pay attention to: first, when the hormone is used, the concentration used at high temperature should be lower, and the concentration ratio at low temperature should be slightly larger; second, the melon seedlings of zucchini are growing vigorously, and the drug concentration should be high, and when the growth is weak, the concentration should be smaller. 8. Zucchini was harvested in time with tender melons as product organs. at 7-10 days after the female flowers withered, the ovary developed rapidly, reaching the mature standard of edible tender melons, and the yield reached 4000 to 6000 kg per 667 square meters. When the first batch of tender melons were harvested, it was time for spring flowers to blossom, and its management was mainly to reduce temperature and humidity. Click to get more zucchini planting techniques click to get more vegetable planting techniques