Vegetable cover film to "five"

1. Prevent the occurrence of roasted seedlings in mulching and cold vegetable mulching. There are two reasons: one is that the bleed is not timely or the amount of bleed is not enough, the film burns the seedlings under high temperature; the second is the rigorous closing of the planting holes, etc. High-humidity gas bursts out of the hole and damages the crop's stems and leaves. The prevention method is to release the wind in a timely manner. Usually, the membrane holes and the planting holes that lead to the seedlings must be sealed. There are also two reasons for the occurrence of cold seedlings (including frost and cold damage) in mulching film cultivation: first, early planting (seeding), and second, cold spring. The prevention method is to increase temporary cover to prevent cold.

2, to prevent the shortage of fertilizer and water There is a shortage of fertilizer and water in the mulching cultivation of vegetables, which is usually due to the increased demand for fertilizer and water from vegetables, and the peak period is advanced. However, the base fertilizer and bottom mash are insufficient, or the management of fertilizer and water does not keep up. Prevent methods: First, increase the amount of basal fertilizer and pouring enough water; Second, according to the characteristics of plastic film cultivation and the need for fertilizer and water law, timely fertilizer and watering.

3, to prevent grassland in the middle and late grassland in the latter part of the grassland, can be taken to solve the following methods: First, the choice of weeding film or black film; Second, manual weeding; Third, when the weeds arch up the film, directly on the film pressure earth stuffy grass .

4, to prevent the density of vegetables covered with plastic film cover cultivation, generally lower than the density of conventional open cultivation of 5% to 15%.

5. Prevention and control of insect pests Due to the advancement of mulch-covered cultivation materials, some diseases and pests will also occur in advance, and prevention and control should be implemented as soon as possible.

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