Cucumber has the characteristics of happy water, large water requirement and poor drought tolerance. It ensures the temperature required for plant growth in low temperature environment and promotes normal growth and development of cucumber plants in the low temperature period. In order to obtain high yields, it is also necessary to accurately grasp the correct irrigation techniques of cucumbers at different stages of growth. According to the summary of practical experience, the irrigation techniques for greenhouse cucumbers are as follows:
First, watering according to the characteristics of Yuci. In winter greenhouses, wintering cucumbers are cultivated. The planting period is generally at the end of October. At this time, in addition to watering and planting water in a timely manner, it is generally no longer necessary to water in the first melon, and it can be covered after pouring fruit water. Film insulation moisturizing, such as the need for additional water poured under the membrane, so as not to reduce the temperature. Increase the amount of water after the weather warms to meet the fruit growth and development. The greenhouse cucumbers cultivated in early spring should be watered in time to meet their water demand.
Second, watering according to the characteristics of different growth periods. Under normal circumstances, the cucumber side of the planting watering, pouring planting water after 3 to 5 days and then a watering time, until when the young melons grow to 15 to 28 centimeters to promptly fill the water. Sit cucumber and pour it again. The results of early colonization is smaller, the amount of leaf evapotranspiration is small, the number of fruit is also small, ventilation is also small, usually 7 to 10 days pouring a water, (the amount of water should be small). Afterwards, with the growth and development of the plants, the number of sitting cultivars increases, the ventilation volume increases, and the transpiration increases. The number of watering intervals and the amount of watering should be shortened to keep the soil dry and wet (mainly wet). Water can be poured from 5 to 7 days, and the soil should be kept moist during the collection period to increase the weight of the individual vines.
Third, the watering time in the greenhouse. During the growing season, watering should be done on a sunny day. After watering, it should be ventilated and drained. It should not be watered in the afternoon, evening or rainy days, otherwise it may cause too much humidity in the shed and cause downy mildew and other diseases; it should not be watered at noon. , in order to avoid high temperature watering affecting the root physiological function; late hot weather, greenhouses can stay up late for large ventilation. Water should be used sooner or later to cool down.
Fourth, look at growing situation watering. The plant is dark green, with shiny, green and flat leaves and stretched heart and leaves. It is a uniform and appropriate expression of water. Such as the heart is not shrinking leaves, dark green leaves, sunny days with mild leaf sagging for the lack of water performance, to timely supply of water. If the leaves are over-expanded, the leaves are large and thin, and the leaves are spewing too much water, which is an expression of excess water.
V. Cucumber irrigation in the late stage of growth. The late stage of cucumber production has experienced more than 100 days of growing period. At this time, the plants have tended to be senescent. If we want to continue to have good yield and benefit from good results, we must continue to apply irrigation and fertilization, and strengthen the implementation of comprehensive technical measures. We should not neglect management. . At this point should control the amount of irrigation, so that 7 days a water.
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