Vine fall is a relatively important part of cucumber planting management, and the technical content is not strong. Although it is simple to operate cucumber vines, there are still many vegetable farmers who do not handle the details properly, which affects the growth of cucumbers. For example, the vines are too low and the number of functional leaves is insufficient, which affects the expansion of the melon; the vines cause wounds. Cause diseases and so on.
The height of the vine should be appropriate
Pay attention to ensuring sufficient leaf area when falling vines. At present, many vegetable farmers manage multiple greenhouses, such as vine falling and picking melons, and often hire workers. Due to the high cost of hiring labor, in order to reduce expenditure, some vegetable farmers fall too low at one time to reduce the number of fall vines, resulting in insufficient number of functional leaves, weaker plant growth, and more deformed melons. Generally speaking, the yield of a cucumber is higher, and it requires at least 13-15 pieces of functional leaves. This requires that the height of the cucumber after falling vines be maintained above 1.5 meters, this height can maintain the best number of leaves, improve photosynthetic efficiency, so that the growth of the plant is strengthened, and it is also conducive to agricultural operations.
Properly pick leaves after falling
Falling vines combined with leaf picking is the experience of many vegetable farmers. However, there are also many vegetable farmers who try to save trouble without picking leaves. The author saw in the shed of Qingxu vegetable farmer Zhang that the cucumber vines had fallen, but the lower leaves were not removed. The old leaves were close to the ground, and some of the leaves had rotted. If you poke the lower leaves with your hands, you can still see The unpicked cucumbers that were dropped when picking melons a few days ago have become "old cucumbers". It turned out that Master Zhang had been planting cucumber sheds for two years. He was too busy to pick the leaves. He hired someone to pick the leaves for more than 100 yuan a day. In addition, the price of cucumbers was not high. It was not economical to calculate and it was too troublesome. No more leaves. Although this saves money and troubles, it also has many drawbacks. After the vines fall, the lower leaves are spread on the ground, and the leaves are gathered together. The light conditions are extremely poor, which is not conducive to the increase of ground temperature; due to the gathering of leaves, the air circulation in the lower part of the plant is poor, and the outside temperature in winter is low, and the humidity in the shed increases. If the plant is large, the stress resistance of the plant will decrease, and pathogenic bacteria will easily infect from the old leaves, which will lead to the occurrence of diseases.
In winter, you must cooperate with the picking of the leaves when the cucumber is falling. The old leaves from the lower part can be removed first, and the vines can be dropped after the wound is dry, or the leaves and vines can be picked at the same time. It is also important to choose a sunny morning for cucumber fall to ensure that the wound recovers as soon as possible. You cannot choose a cloudy day or a sunny afternoon to reduce the chance of disease infection. After picking the leaves and vines, pay attention to spraying the agent in time. You can choose biological agents such as Trichoderma harzianum or chemical agents such as chlorothalonil and thiazolium copper to prevent in advance and improve plant disease resistance.
Prevent stems from sticking to the ground after falling
As the vines continue to fall, the cucumber's own stems are close to the ground, and adventitious roots are easy to sprout when the humidity is high. Vegetable growers should check after the vines fall, especially after watering, if any adventitious roots are found, cut them off immediately. After cutting the roots, apply fine dry soil or copper preparations to the wound to prevent germs from invading the wound. In winter, cucumber sheds are generally covered with mulching film. Cucumbers are prone to adventitious roots when there is water on the local mulch. Therefore, the surface of the mulching film must be kept dry, especially after watering, the water remaining on the mulching film should be removed from the shed in time. The water dripping on the mulch is led to the underside of the mulch, or holes are punched in the mulch to let the water run away.
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