How to prevent premature senescence of cucumber

When we plant cucumbers, although the yield of cucumbers is relatively high. However, some problems are often encountered that affect the growth of cucumber, especially in the middle and later stages. There is often the phenomenon of premature senescence, which will seriously affect the yield and quality of cucumber. Thus affecting the planting efficiency of growers. So when we plant cucumbers, how to prevent premature senescence of cucumbers? Let's take a look at it.

1. Root cultivation and root protection

The premature senescence of cucumber is partly due to the aging of cucumber roots. Therefore, in order to prevent premature senescence of cucumbers, we should do a good job of root cultivation and root protection. The maximum low temperature in the shed should not exceed 25 degrees to promote root growth. Watering should pay attention to the time, preferably before 10:00, not in the afternoon watering, to avoid high ground temperature, low water temperature caused by the root can not adapt, but also cause damage. If soil hardening occurs, plastic film should be removed in time and shallow hoe should be carried out to improve soil permeability and promote the normal growth of cucumber.

2. Fertilizer and water management

In the later stage of cucumber growth, we should do a reasonable job of water and fertilizer according to the growth of the plant. Topdressing combined with watering, flushing application of high nitrogen and potassium compound fertilizer, but we should pay attention to control the amount of fertilizer to prevent excessive fertilizer leading to root burning of cucumber plants. Topdressing is usually done once every 2-3 weeks to provide adequate nutrition for the growth of plants and fruits. For cucumber roots that have begun to senescence in the late growth stage, foliar fertilizers such as potassium dihydrogen phosphate and humic acid should be properly applied once a week to supplement the lack of nutrients due to the lack of root ability. slow down the process of plant senescence.

3. Prevention of high temperature heat damage

After the temperature in the cucumber greenhouse exceeds 30 degrees, it is necessary to do a good job of preventing wind and cooling. Especially in the afternoon, the temperature is higher, it is necessary to increase the vent. Then according to the weather changes and soil water content and other actual conditions to do a good job of watering and cooling, mainly small water irrigation, to avoid heat damage leading to the hindrance of cucumber stem and leaf growth, resulting in premature senescence. If ventilation, irrigation and other cooling methods are not very ideal, then it is necessary to cover the sunshade net in time, which can effectively reduce the temperature. However, it should be noted that the sunshade net can only be covered under high temperature and strong light, and when the natural light is weakened or the natural light is insufficient on cloudy and rainy days, we should pay attention to pull the sunshade net open in time.

4. Strengthen the management

In the cucumber growth period, it is necessary to control the height of the plant, if the cucumber stem is close to the top of the shed, the vine should fall in time. When falling the vine, we should also pay attention to the height, if it is too low, it is very disadvantageous to the growth of cucumber. The height of the plant should be kept at about 1.5 meters after falling vine, and the plant should retain at least 20 functional leaves. Leaves should be evenly distributed on the plant to improve photosynthetic efficiency. Then it is necessary to remove the diseases, insect pests and leaf melons in time, such as withered leaves and yellow leaves, diseases and insect pests, deformed melons and so on. Avoid consuming too much nutrition and concentrate nutrients on healthy melons, which can also improve permeability and promote plant growth.

The above is a brief introduction to how to prevent premature senescence of cucumbers. In addition to the above, we should also do a good job in the prevention and control of diseases and insect pests to ensure the healthy growth of cucumbers. That's all for today's introduction. This article is for reference only. I hope it can help you all.