Cucumber is very sensitive to fertilizers. Pay attention to the following points when topdressing:
one. Planting seedlings should see the seedlings before planting and control the amount of fertilizer. In the early stage of cucumber growth (within one month after planting), the soil temperature is still low. If too much fertilizer or watering occurs, “root rot†will occur. This is due to the weak root activity and insufficient absorption of soil water. In many cases, the air is reduced, and the roots suffocate and rot. On the ground, the leaves are thin, the leaves are not bright, and they are easy to wilt. Therefore, the cucumber cannot be fertilized and watered excessively at one time, and the top-dressing method of “a thin and heavy application and a small amount of meals†is applied.
two. In addition to the application of sufficient organic fertilizer, a large amount of chemical fertilizers should also be applied. Cucumber is a kind of vegetable with a shallow root system and a large amount of fertilizer. During the production process, the top-dressing period should be aggravated in the young fruit period to the harvesting period to promote the growth and development and the fruit nutrients during the fruit enlargement period. Cultivate the cucumber in the greenhouse. Do not shave the ridges or dry the plants. Do not use the gutters. Do not apply too much fertilizer. The average cucumber is 1.5 grams per cucumber. During the peak period of picking cucumbers, water is poured every time. To mix fertilizer and water, it will not produce fertilizer, but also get high yield. In the middle and late stages of cucumber growth, when the leaves were found to be thin and yellow, 50 kg of urea was mixed with 15 kg of water, and the leaves were sprayed after being dissolved thoroughly, once every 5-7 days for 3-5 consecutive times. When it was found that the melons were severe or misshapen, they were treated with potassium dihydrogen phosphate 50g and watered 15kg and sprayed with foliar for 3-5 days. In the later stage of production, the roots are old and can use urea at the SAMe time.
3. Foliage topdressing is an economical and effective top dressing method. The cucumber not only absorbs nutrients from the soil from the roots, but also absorbs mineral nutrients from the leaves to promote fruit development. Usually in the middle and later stages of production, when the leaves are thin and yellow, nitrogen is chased. After applying 15 grams of urea, 15 kg of water is sprayed on the leaves and then sprayed on the leaves. Each 5 days to 7 days is repeated 3 times - 5 times. The effect is very good. it is good. When it was found that the melons were severe, the melon leaves were hypertrophy, and the melons were misshapen, the potassium dihydrogen phosphate 50 g was used to spray 15 kilograms of water and sprayed on the leaves for 3-5 days. This also received certain effects. In the later stage of production, the roots are senile. At the same time, 50 grams of urea and potassium dihydrogen phosphate may be used for 15 kilograms of water. Then half bottles are sprayed and sprayed to dissolve the sprayed leaves. It can replace the top dressing and increase the disease resistance of cucumbers. Aging strives for high yields. However, in general, no pesticide can be sprayed into the fertilizer at the same time. It is easy to produce phytotoxicity or drug failure. When spraying is needed at the same time, the pesticide can be sprayed in the afternoon.
four. Avoid fertilizing when the soil is wet or hot. In wet soil conditions, fertilization can easily lead to female flower differentiation, malformation of melons, defoliation, falling flowers, and melons. Physiological diseases such as falling leaves, falling flowers, and melons, etc., and fertilization under high temperature conditions, the water evaporation of the leaves of plants will affect the exertion of fertilizer efficiency. In addition, the fertilization time is appropriate in the early morning or early evening.
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