The time and method of growing cowpea seedlings in the early spring in the greenhouse

Although the price of cowpea and other legume vegetables is high, the output is low, which greatly affects the overall efficiency. How to increase the yield of legume vegetables? According to vegetable growers, cowpea seedlings are cultivated in the greenhouse in early spring after New Year's Day, and planted in mid-to-late January. Four crops can be harvested. The yield is 20,000 catties per mu. The benefit is higher than ordinary vegetables, but the investment is less. It is a good choice for early spring planting.

1. Variety selection

Other aspects can be saved, and seeds must not be saved. The most suitable varieties and the best quality seeds must be selected. There are many varieties of cowpea, and suitable varieties should be selected according to the market demand of different regions. When choosing seeds, you must choose full and large seeds. During the early spring seedlings, the temperature is low and the light is weak. The quality of the seeds must be guaranteed to ensure that the seedlings are strong, shorten the seedling period, and plant early.

2. Do a good job in the selection and treatment of substrate

At present, plug seedlings have replaced nutrient bowls, and the substrate has become the main material for seedlings. However, every year, a large number of vegetable farmers suffer from the seedling substrate. Problems such as poor seedling emergence, burning of seedlings, and defertilization are commonplace. The use of seedling substrates causes outbreaks of nematodes, snails and other pests in the shed. Helpless.

Therefore, you must pay special attention when choosing a substrate. Vegetable growers can go directly to the nursery to purchase the substrates used in large quantities, or buy large-brand substrates with guaranteed quality from the market. When buying substrates, one mu of land needs only 100 Yuan, this is a small amount of money, but it has a huge effect. Don't be greedy for small gains and suffer big losses.

After purchasing the substrate, in order to prevent diseases in the seedling stage, the substrate will be treated to kill pathogenic bacteria and control the occurrence of diseases in the seedling stage. In the past, chemical agents, such as carbendazim and thiram, were mostly used to treat the substrate, but the chemical agents had a short duration of effect.

3. Management before and after planting

After the substrate is processed, it can be directly loaded into the plate and ready for seeding. Cowpea seeds are relatively large, so the seeding depth is preferably 1-1.5 cm. Press the substrate with your hands, sow 1-2 seeds per hole, then re-cover the substrate, water enough water, and cover the mulch to keep warm.

If you want cowpea to grow vigorously in the later stage and have a high yield, it is very important to raise seedlings. Whether the cowpea seedlings are good or not, the temperature management after sowing is very important. According to Master Zhang, 100 hours after sowing, the minimum temperature in the shed cannot be lower than 16°C, and the minimum temperature is above 20°C. Under the condition of ensuring proper temperature, cowpea seedlings emerge neatly, the main root grows quickly, and the best root structure can be formed. Both deep roots and shallow roots are available. This is a key measure to ensure that the seedlings have a good root system after planting. If the temperature is low, the main root grows slowly after the seed germinates, and even necrosis occurs in severe cases, causing the cowpea root system to be difficult to penetrate deeply in the later stage, and the resistance to stress is weak and easy to get disease.

It is recommended that cowpea seedlings must be optimistic about the weather forecast, choose continuous sunny days, and take heat preservation measures to ensure the temperature after sowing to lay a solid foundation for the growth of cowpea.

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