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Strong control and cultivation of strong trees should be based on the regulation of temperature, light, water and fertilizer. The optimum growth temperature of pumpkin is between 25°C~30°C during the day, 18°C~20°C at night, less than 15°C or more than 35°C during the day. It is easy to affect the flowering and fruit setting, and there are many malformed flowers. Pumpkin grows vigorously and is prone to leggy. It is necessary to carry out temperature management. The so-called variable temperature management is based on the different growth period of vegetables, according to its optimal growth rate, adjusted to different temperatures, to achieve the purpose of strong trees. From the time of planting to the time before flowering, regulating the temperature, especially the night temperature, is an important means of inhibiting growth.
Pumpkin is a short-day crop, and its light-seeing time is about 8 hours at the seedling stage, which can effectively promote the development of female flowers and increase the fruit setting rate, which is conducive to the suppression of excessive vegetative growth.
Water and fertilizer are also important factors that affect the growth of pumpkins. The pumpkin has a well-developed root system and strong drought tolerance. It can properly control the watering in the shed to prevent wilting. There is little demand for fertilizers in the early growth stage of pumpkins, which can reduce the amount of chemical fertilizers used in the base fertilizers, but mainly include soil-fertilizer or manure. After the pumpkin sits on the melon, pay attention to timely dressing, can be applied per acre of high potassium compound fertilizer 30 kg, calcium nitrate 10 kg, continuous topdressing twice.
In addition to regulating environmental factors, attention should also be paid to the use of plant growth regulators. It can be sprayed with 1% paclobutrazol 150,000 times after the pumpkin exhibition vines, depending on the growth conditions to determine the time and frequency of use in the later period, inhibiting its excessive vegetative growth and promoting flowering and fruit setting.
The high quality and high yield of pumpkin is the key
Pumpkin has a strong root system, deep and wide distribution, strong resistance to stress, and strong ability to absorb water and nutrients. The cultivation of pumpkins in greenhouses with high levels of fertility often leads to excessive luxuriant stems and leaves, which often cause flowering and fruit drop, and the yield is not high. Therefore, to cultivate squash in arch sheds, it is necessary to strengthen management, properly plant close-packed plants, and control growth so as to fully utilize fertility and increase yield.