How to manage cowpea from sowing to emergence

From sowing to the emergence of cowpea, temperature management must be done in the first three days, which will help to emerge quickly and ensure that the seedlings are strong. In winter, the temperature is low, and after mulching, water evaporates slowly. From sowing to emergence, watering management is not required. So, how should cowpea be managed after emergence?

1. Pre-emergence insulation and post-emergence preservation

Cowpea is the most sensitive to temperature before and after emergence, which is what Master Zhang has repeatedly emphasized. However, after the emergence of the seedlings, the nutrients of the seeds are exhausted, and the seedlings need organic nutrients produced by photosynthesis to continue to grow.

In recent times, Shandong, Hebei and other places have seen severe smog. From January 11th to 14th, Shouguang City, Shandong Province issued a yellow and orange warning for heavy fog. Until the afternoon, the sky was still foggy and the lighting conditions were extremely poor. The period from the winter solstice to the cold solar term is also the time when the temperature in the north is the lowest and the sunshine time is the shortest. Under this condition, after the cowpea emerges, sufficient light must be ensured to cultivate strong seedlings and improve the quality of seedlings.

Since the seedlings are unearthed, vegetable farmers must adjust management strategies in time according to the weather conditions. In the case of low temperature and low light in winter, we must first ensure the light:

One is to pay attention to the high light transmittance of the multilayer covering film. In many vegetable growers' seedling sheds, the outer film should be equipped with dust-removing cloth strips to remove the film dust at any time. If there are places that are difficult to clean, the vegetable growers should rinse or scrub with water to ensure the light transmittance of the outer film. For the inner covering film, Master Zhang specially reminded that you must choose a new film, and you cannot use the old film retained in previous years. The old membrane is dusty and the light transmittance is greatly affected. It can be used in other seasons, but it cannot be used for deep winter seedlings.

The second is to pay attention to artificial lighting. The area of ​​the seedbed is limited, and artificial lighting is completely achievable, and the cost is not high. Artificial supplement light*** Choose a special vegetable supplement light lamp, which has high lighting efficiency and less waste, which is the best choice. If there is no special fill light, it can also be replaced by an ordinary incandescent lamp, which can also heat up while filling the light. However, the commonly used fluorescent lamps for lighting cannot be used because their design mainly considers the needs of the human eye, but does not meet the needs of vegetable growth. When there is a haze weather similar to the previous few days, vegetable farmers can turn on the lights for 5-6 hours during the day to avoid weak cowpea seedlings and poor growth of the root system, laying a solid foundation for subsequent cultivation of strong trees, high yield and high quality.

2. Appropriate fertilizer to promote seedlings and strong seedlings

After emergence, as the root system expands, the seedlings begin to absorb a large amount of nutrients from the substrate. However, the current vegetable growers’ seedlings are mostly 50-hole plugs, which are filled with a small amount of substrate and lack nutrients. After the cotyledons are flattened, the nutrient supply in the substrate begins to be insufficient. At this time, supplements should be made to ensure that the seedlings Growth is strong.

After the seedlings came out, the vegetable grower began to sprinkle water for the first time. At this time, 2000 times of Ishihara Taurus suspended calcium and 1000 times of Bacillus subtilis resistance can be added to the water. Calcium fertilizer has an outstanding effect on promoting rooting, improving stress resistance and cultivating strong seedlings , Bacillus subtilis and other biological agents can symbiosis with the root system, promote the growth of the root system, inhibit the proliferation of pathogens, and promote root disease prevention. When sprinkling water for the second time, you can choose high-quality water-soluble fertilizer to supplement nitrogen, phosphorus, potassium and trace elements to promote the growth of seedlings.

Cowpea seedlings have a short period and grow fast, so they must be reasonably adjusted, strengthened management, and timely fertilization to prevent diseases to ensure that the seedlings are strong.

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