Five measures to prevent the premature decline of summer vegetables
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Measure one: Reasonable pruning
1. Take heart. The main role of topping is to prevent crop plants from becoming long, reduce excessive nutrient consumption, and promote plant multiple results. Such as sweet pepper, to be the first sweet pepper after sitting, timely cutting off the lower branches of the plant, while the upper side of the fruit also leaves two leaves topping, this can reduce the consumption of nutrients, reduce the falling fruit, improve the yield of pepper . Another example is a tomato. After the last fruit (usually the fourth ear or the sixth ear fruit), the heart must be picked up after the fruit is picked up, and two leaves are left in the upper part of the ear. Don't try to pick it up just as soon as the last spike inflorescence. In order to avoid causing premature root failure and plant leaf curling.
2. Remove old leaves. All kinds of fruits and vegetables should be promptly removed from the old leaves, dead leaves and diseased leaves of the plant. This will not only reduce nutrient consumption, but also effectively control the spread and spread of the disease, help to air and light and reduce the temperature, promote Plants thrive.
Measure 2: Timely top-dressing and de-fertilization is one of the main causes of premature plant failure. Timely topdressing can provide sufficient nutrients for plant growth and development, which is a key measure to prevent plant aging. The best time to top-dressing is when the fruit is sitting and a certain amount of compound fertilizer or decomposed farmyard manure is applied with water according to different vegetables. If cucumbers require large quantities of nitrogen and potassium, they can use high-quality compound fertilizers (such as Dutch Aipp compound fertilizer, Huafeng compound fertilizer, etc.) for 80 kg per mu; for example, tomatoes, the quantity of potash fertilizer required during the prosperous period can be large. Each kilogram of potassium per acre compound fertilizer (such as Hubei potassium sulfate compound fertilizer) 60 kg.
Measure three: Strengthen cooling In the hot summer months, high temperature is the most important factor causing premature plant failure. Therefore, management measures should be strengthened to reduce the temperature and regulate the temperature inside the greenhouse so that it can reach the temperature suitable for vegetable growth. The commonly used cooling measures are to widen the vents, install the shade net, and cool the water. Need to be reminded that the use of shade nets must pay attention to the correct use of shade nets: only in the sunny hours before and after noon around 3 hours of use, can not be used throughout the day, to prevent weak light caused by plant growth and premature aging.
Measure four: timely prevention and control of insect pests in the summer heat season, pests and diseases are the key targets for prevention and control of viral diseases and insect pests. This type of problem has been introduced in the near future and is not repeated here.
Measure 5: Early harvesting Early harvesting can prevent falling trees and prevent premature plant failure. At the same time, it can increase the ability of vegetables to continuously set fruit and increase vegetable yield. For example, if the tomato is harvested properly, the top of the fruit will turn red in color, and the pepper will be harvested before the fruit is red.