In the production process of wintering cucumbers in greenhouses, physiological barriers to flowering and topping often appear, which have a great influence on the yield and quality of cucumbers. Prof. Yang Zhongan, a professor at the College of Agriculture of Northwest Agriculture and Forestry University and a vegetable expert, reminds me to take specific reasons for flowering. Corresponding control measures.
Top reasons
Temperature imbalance in the period from the time of planting seedlings to flowering and squashing, if there is a continuous low temperature, the vegetative growth of the plant is hindered, and the flowering of the plants is likely to occur when the reproductive growth is too fast.
Roots and roots rot in the root shed indoor high temperature and drought, especially when the soil is dry, due to excessive fertilizer, lack of water resulting in burning root, or the soil is too wet, but the temperature and the ground temperature is low, resulting in roots, are easy to form a flower topping.
Water and fertilizer do not regulate soil conditions, discomfort, weak root activity, poor water absorption capacity, due to physiological deficiency, there will be cucumber flowers topping.
Prevention
Control the temperature of the shelf to prevent the temperature from being too low or too high and maintain the proper temperature.
The cultivating loose soil is for the purpose of raising the ground temperature. If necessary, fertilize and water the soil first, then raise the temperature by loose soil and promote the development of the root system and the lower bar.
Scientific fertilizer management greenhouse cucumber water and fertilizer application to grasp the principle of small, multiple, Shi Liu, especially the application of organic fertilizer must be fully decomposed, to prevent improper application of fertilizer and root damage, the amount and frequency of topdressing should be minimized according to weather conditions. At the same time, it should be watered in an appropriate amount to avoid groundwater flooding and affecting the ground temperature.
Strengthen the management of plants in the field There have been flowering plants, appropriate removal of young and female flowers, and foliar sprays with potassium dihydrogen phosphate 500 times. For the flower topping caused by low-temperature freezing damage, plant protection agents such as bi-protection and alizarin can be sprayed to enhance the plant's ability to resist cold and promote root and plant development.
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