What are the planting techniques for collecting rain and increasing soil moisture of spring corn with double furrows and plastic film mulching?

Sometimes there is cold air and frost. After sowing seeds, because the temperature is too low, they can't germinate for a long time and are easy to rot and mold. And although some of them have been unearthed, they are good enough to raise seedlings, but they remain unchanged, and there are many phenomena of Huang Miao's death. That is, corn planted after wheat harvest. The planting time of spring corn is earlier, and the sowing time is not fixed because of the large latitude span between north and south in China. Generally, from February to May, from the geothermal point of view, when the temperature of 10 cm soil layer is above 10 degrees Celsius, seeds can be planted immediately.

First, solve the problem of straw returning to the field; At present, the wheat varieties selected by farmers' friends are all high-stalk varieties with high planting density, so the total amount of wheat straw returned to the field has an impact on summer corn planting. This has high requirements for soil moisture and farming machinery when we sow; There are two main reasons: first, sowing early, corn seeds need to consume a lot of nutrients during germination and emergence, resulting in too little residual nutrients; Second, at low temperature, after the emergence of corn, the resistance is relatively weak, the growth is not prosperous, and the seedlings are weak and yellow.

Generally speaking, during the period after Grain Rain and before the long summer, the weather conditions are relatively stable, the ground temperature rises rapidly, and there is no cold current, which is the best time for planting. It is easy to have short purple seedlings or occasional cold current too early, and it will delay the next crop arrangement and harvest time if it is too late. Excellent maize variety with high resistance to leaf blight and bacterial wilt, green branches and leaves at harvest, mature living stems, outstanding resistance, strong stress resistance, uniform stems, consistent inside and outside, and high and stable yield! Among them, Woyu 558. Woyu 3, a fertile seed industry in Hebei, performed particularly badly!

Plastic film corn is to increase plastic film coverage on the basis of direct seeding corn in the open field. Therefore, in addition to ensuring the sowing quality requirements of direct seeding corn in the open field, it is also necessary to ensure the sowing requirements of plastic film mulching, so as to give full play to the warming and moisture conservation function of plastic film and realize the goals of seedling qi, seedling qi and Miao Zhuang. Therefore, it can promote the growth and development of maize roots, increase maize yield and increase income. The disadvantage is that it costs hundreds of dollars to cover an acre of corn, and the yield of corn is not high, so most people are reluctant to cover the film.