Five Management measures of Watermelon in greenhouse with early maturity, High yield and High benefit

Watermelon cultivation in greenhouse is highly technical and belongs to fine and intensive cultivation. Only by taking comprehensive measures to grow watermelon can we achieve the goal of early maturity, high yield and high benefit.

Greenhouse watermelon

First, adjust the temperature in the shed. Within 5-7 days after watermelon seedlings are planted, attention should be paid to raising the ground temperature. When the daytime temperature is higher than 35 ℃, it is necessary to find ways to block the sun and cool down. The temperature can not be lower than 15 ℃ at night. The temperature of the shed can be controlled by opening and closing the skylight. When the watermelon vine grows to about 3 cm, the small arch shed can be removed. During the full flowering period of watermelons in the greenhouse, sufficient light and high night temperature should be maintained. When the external temperature exceeds 18 ℃, ventilation should be increased. The skylight and both sides of the greenhouse should be ventilated at the same time to keep the daytime temperature in the greenhouse less than 30 ℃, so as to prevent high daytime temperature and excessive diurnal temperature difference, resulting in the decline and deterioration of watermelon meat quality.

Second, pruning and pressing vines. Each watermelon seedling leaves only one main vine and two lateral vines, and the excess watermelon lateral vines are removed in time to promote the concentrated supply of nutrients to the growth of watermelons; the main vines are timely managed to the central position of the greenhouse to increase the temperature of the melons; the reserved lateral vines should be managed in time so that watermelon vine leaves are evenly distributed on the border surface and improve the utilization rate of light energy.

Third, timely fruit thinning.

Fourth, artificial pollination. According to the flowering habits of watermelons in the greenhouse, pollination should be carried out at 8-9 am. If the male flower spreads powder late in cloudy days, it can be postponed appropriately. The method to prevent and cure the late pollination of watermelon male flowers on cloudy and rainy days: pick the watermelon male flowers that can open the next day in the afternoon and put them in a dry and warm room, so that the male flowers can blossom on time in the next morning, and then use this flower to pollinate the female flowers of watermelons. Artificial pollination should start from the second female flower of watermelon. In order to keep melons.

Fifth, comprehensive prevention and control of diseases and insect pests. Planting improved varieties of disease-resistant watermelon and changing stubble rotation to reduce the occurrence of diseases. Root replacement by grafting can promote the root development of watermelon seedlings and enhance the ability of watermelon to tolerate low temperature and Fusarium wilt. The best choice for the control of diseases and insect pests is aphid smoke agent, chlorothalonil compound smoke agent, methyl topiramate and so on, which is helpful to control the temperature in the watermelon greenhouse and reduce pollution.