Compared with greenhouse vegetables in early spring, greenhouse vegetables are favored by many vegetable farmers for their small investment, low risk, and high yield. However, many vegetable farmers do not have enough knowledge of key technologies for cold spring vegetables in early spring. In the early spring, vegetables are about to enter the planting period. Here are some key technical measures.
First, early cover film temperature
This spring, the temperature is obviously lower, the recovery is slower, and the ground temperature is lower, which is not conducive to the colonization of vegetables. The delay of the planting period will cause the delay of the vegetable market, and the time advantage of the city will not be able to be played, and the economic benefits will be significantly affected. Protected vegetables are often listed earlier, and the better their prices, the higher the corresponding economic benefits. Therefore, in view of the actual conditions of low temperatures this year, scaffolds should be installed as soon as possible, and the greenhouse film should be covered as soon as possible to raise the temperature within the cultivation chambers so as to create suitable temperature for the planting of seedlings in due course.
Second, early watering protection
In the winter and this spring, the vegetable production areas in our province have less snowfall due to effective rainfall, and the lack of cropland in the vegetable fields is generally serious. After planting seedlings in early spring vegetables, they should generally be poured with headwaters. The amount of water is relatively large. Because watering often leads to a drop in ground temperature, it is not conducive to vegetable seedlings growing as soon as possible, which can easily result in the emergence of dead seedlings or aging seedlings. To this end, watering should be done as soon as possible, first relieve the soil moisture content, and then cover the greenhouse film to increase the temperature inside the shed. Wait until the seedlings are planted and then pour the head water once.
Third, for high-coated film
Planting vegetables such as tomatoes, eggplants, sweet peppers, cucumbers, and zucchini, etc. In the early spring, due to the low temperature and high humidity in the cold house, it often leads to diseases such as tomato early blight, cucumber downy mildew, sweet pepper wilt and other diseases. In cultivation, we must change the way of planting, and change from the traditional flat hoe cultivation to sorghum film mulching cultivation, which can play a very good effect of increasing temperature and humidity, increasing the utilization rate of fertilizers, cultivating strong seedlings, reducing the occurrence of diseases, and increasing yields. .
Fourth, apply base fertilizer
In early spring, cold fruit greenhouses have a large demand for fertilizer, and it is very important to apply sufficient base fertilizer. Fertilizer should be used in combination with organic fertilizer and chemical fertilizer, and organic fertilizer must be fully decomposed. Solanaceous vegetables mainly increase the use of phosphate fertilizer and potash fertilizer, and leafy vegetables use mainly nitrogenous potassium fertilizer. For the heavily-planted plots, if the soil is compacted or salinized, it is necessary to pay attention to the addition of biological bacterial fertilizer, which can improve the soil properties and increase the efficiency of fertilizer utilization. It is very effective in improving vegetable yield and improving quality. Big.
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