The leaves have a great influence on the yield of cucumber because it is a factory that produces organic nutrients. It can be said that there is no yield without leaves. To ensure the high quality and high yield of cucumber, scientific and reasonable adjustment must be made to the cucumber leaves.
First, the relationship between cucumber leaves and yield
If the leaves are too small to reach a certain leaf area coefficient, the organic nutrients produced will be less, the melon will be small and small, the yield will not be high naturally, and it is easy to premature aging. If the leaves are too large, it proves that the nutrients have grown too prosperous and become appetite-type. When the organic nutrients supply a large number of stems and leaves, the nutrients flowing to the melon will be reduced, and the melon will be thin. Many vegetable farmers have reflected that the cucumber leaves are large and green. How to produce melons is not as good as the small leaves. This is the saying that the proverbial "prosperous and unrestrained" does not produce melons. Excessive cucumber leaves are not only related to varieties, but are mainly caused by improper management. For example, if the fertilizer is too large, the conditions of high temperature and high humidity, it is easy to form large leaves. If the yield is about 20,000 kilograms per acre, the diameter of the middle and lower leaves should not exceed 20 centimeters, and the average length between the nodes should not exceed 12 centimeters. The total vine length should be more than 8 meters. How to achieve such a growth index, management must take effective measures to make reasonable adjustments in order to achieve the purpose of high quality and high yield of cucumber.
Second, the cucumber blade adjustment measures
1. Pay attention to fertilization types. Base fertilizer application should be sufficient, such as Mushi chicken, duck, pig manure about 10 cubic meters, high nitrogen fertilizer can not be applied again, should use high potassium compound fertilizer, 100 ~ 150 kg per mu. Before root picking, it is not appropriate to flush chemical fertilizers. Afterwards, high-potassium compound fertilizers are preferred for flushing, and each time, 15 kg per mu are rushed.
2. The seedling controller is the basis for controlling the leaves. Three to four leaves of cucumbers begin flower bud differentiation, which is a critical period for increasing the number of female flowers and controlling internode elongation and leaf expansion. On the basis of reducing the supply of fertilizer and water, the hardening of seedlings is an important measure. Strong light can shorten the internodes, making the blades smaller and thicker, reducing shading and maximizing glare are necessary. The daytime temperature is controlled at about 25°C and nighttime at 12°C to 15°C. Moderate low temperatures can make the blades smaller. Appropriate spraying of auxin or que cytosidine or paclobutrazol should be halved according to the instructions, and it can be used continuously for 2 or 3 times depending on the circumstances.
3. Measure and control large-scale in the medium term. The measures taken during the seedling period can all be used for medium-term management. Their particularity lies in the mid-field field canopy closure, which leads to poor ventilation and light transmission, exacerbating the large and thin leaves. After falling, a large number of leaves spread on the ground, not only for photosynthesis, but also compete for nutrients, spread disease, form a vicious circle, timely removal of the bottom of the big leaves, old leaves is very necessary. Fertilizer management should eat less meals, do not use too much fertilizer, watering too much, to flush organic fertilizer and phosphorus and potassium fertilizer. Once internode lengths and large leaves are found, hormone drug control must be sprayed to control the leaves in a suitable range to achieve high quality and high yields.
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