How to prune the winter and spring stubble melons in the solar greenhouse, hang the vines, drop the

The rootstock of melons grafted in winter and spring in solar greenhouses is easy to germinate branches and leaves, and they are removed in time after being found. Due to the abundant fertilizer and water, side branches are easy to occur during the fruiting period, and in the case of large cultivation density, it not only consumes nutrients, but also affects the light, which is easy to cause growth. It should be removed in time in combination with the binding (entanglement) vines.

In the case of low density and not luxuriant branches and leaves, more than 5 side branches can be retained, a melon can be knotted, and two leaves in front of the melon can be plucked, and the melon can be beaten off after harvesting. At the same time of tying vines, it is necessary to remove the side branches of male flowers, tendrils and rootstocks, as well as melons, curved melons and deformed melons in time. The diseased leaves and old leaves at the bottom are knocked off in time, and the above methods can not only reduce nutrient consumption, but also facilitate ventilation and light transmission, and can also reduce the occurrence and spread of diseases.

In order to eliminate indoor moisture and harmful gases and prevent the temperature from being too high, the cucumber stubble in winter and spring also needs to be properly ventilated. However, it should be noted that in the severe winter season, the outside temperature is low, the cold wind blows directly on the melon seedlings or the air volume is too large, which is easy to cause cold damage and frost damage to cucumbers. Therefore, in winter, the wind is generally released from the top of the house or the membrane cylinder.

It is best to use a piece of plastic at the vent to block the cold air that directly invades the greenhouse to prevent damage. The release time is mainly determined by the cucumber temperature management index and the change of indoor and outdoor temperature. After the cucumber is planted, in order to accelerate the slow seedling, it is sealed and kept warm without winding.

After slowing the seedlings, when there is a high temperature of more than 30 in the room for several consecutive days, it is necessary to properly ventilate. Cucumbers are very sensitive to the bottom wind, and in principle, the bottom wind is not released. About a week after the cucumber is planted, it is necessary to insert the rack (hanging rope) and tie the vine (lead vine).

Now, the rope is mostly used to tie vines, which is convenient and labor-saving, and the cost is low, and more importantly, the shading surface is small. The specific method is to plant the upper end of the north and south ridges of the cucumber, pull a thin iron wire from the north to the south, fix the upper end of the hanging rope on the iron wire, and tie the lower end to the hypocotyl of the cucumber plant, and at the same time lead the vine to the hanging rope. <>

The stems of melons are mostly vine-like, hollow, five-edged, and have bristles. After 5-6 nodes, the internodes begin to grow and cannot grow upright, so it is necessary to stand a bracket or a hanging rope to fix the stems. The length of the stems depends on the type, variety, and cultivation conditions.

Generally, the early-maturing spring cucumber type has a short stem and few side branches, while the middle and late maturing summer cucumber and autumn cucumber type have longer stems and many side branches, and the thickness, color and bristle strength of the stem are the indicators of plant growth strength and yield. The leaves of cucumbers are divided into cotyledons and true leaves. Robust cotyledons are hypertrophied, dark-colored, flattened and well-shaped.

Cotyledon storage and production of nutrients are the main nutrients in the early stage of seedlings**; Cotyledons size, shape, and color are directly related to environmental conditions; In production, the morphological performance of the leaves can be used to diagnose whether the environmental conditions of the plant are suitable and guide the production. <

Cucumber has the characteristics of parthenogenesis, which is governed by genetics, environment and fertility status, usually the unisexual seed setting rate of spring cucumber is higher, and the unisexual seed setting rate of summer and autumn cucumber is lower. The parthenogenesis seed setting rate of cucumbers cultivated in greenhouses and greenhouses was high, while the parthenogenesis seed setting rate of cucumbers cultivated in open field was low. The parthenogenesis seed setting rate was higher in strong plants, and the parthenogenesis seed setting rate was lower in weak plants. The growth and development of female flowers of cucumber are characterized by slow growth 3 to 4 days after flowering, and only about 1 cm elongation in 1 day and night; It elongates rapidly 5 to 6 days after flowering, and the daily elongation can reach about 3 cm; After 10 days of flowering, it can reach 20 cm long.

The rate at which the melon strips swell depends mainly on the net assimilation rate, as well as the temperature and water and fertilizer conditions. <>