Greenhouse vegetables strong winter tube physiological disease can be prevented

In winter vegetable greenhouses, the indoor temperature is low, and it is easy to cause cold damage to vegetables. Li Yuhong, an associate professor at the College of Horticulture, Northwest Agriculture and Forestry University, reminds farmers that it is necessary to scientifically use medicines in order to correctly distinguish between common physiological diseases and infectious diseases in winter.

Yellow leaves - greenhouse insulation

Indoor temperature in the winter shed is too low and cold damage is easy to occur. Interviews with reporters have revealed that cold injury occurs in two situations: one is the continuous rainy days in winter, which affects the temperature in the shed. At this time, the vegetables are in a state of starvation, causing the leaves to yellow. At this point, small water can be used for pouring, to avoid excessive water, and with the application of functional fertilizers. Another is the early establishment of vegetable scaffolding, winter vegetables cold weather, affecting the growth of vegetables, then growers need to pay attention to watching the weather forecast, strengthen the greenhouse insulation, increase the thickness of the cover, during the day to pay attention to indoor warming. Avoid watering in low temperature weather and apply amino acids and chitin leaf fertilizers on leaves to increase plant resistance.

Malformed fruit - vegetables need to fill up

Winter is a period of high incidence of deformed fruits in greenhouses, mainly in the important period of flower bud differentiation, and is affected by adverse climate conditions. Flower bud differentiation is a physiological and morphological sign that changes from vegetative growth to reproductive growth. This period has higher requirements for environmental conditions. After the physiological differentiation of flower buds is completed, they begin to develop. At this stage, in the period of morphological differentiation, deformed flowers and fruit are most likely to appear. The growers need to strengthen the light in the rainy weather shed, and pay attention to increase the temperature of the greenhouse, which can be in the foliage. The application of boron fertilizer, potassium dihydrogen phosphate to promote flower bud differentiation.

Poor color conversion - nutrient supply

There are many factors that cause poor coloring of tomatoes and other vegetables in winter, such as low temperature, low light, and low nitrogen and calcium, which can affect the normal color conversion of vegetables. At the same time, there are also many conditions affecting poor color transformation, such as tendon rot, meagre fruit, brown fruit, etc., often the environmental conditions in winter lead to serious impact on pigment transformation, and growers need to remove abnormal fruit early to reduce the impact of plant consumption. , Difficult to wipe the shed film to pay attention to the studio to fill light, reduce the amount of nitrogen fertilizer, foliar supplement boron and calcium and other trace elements. To ensure that greenhouse vegetables in winter can be affected by climate conditions, safe production, to achieve high yield results.

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