Summer sowing soybeans in Anhui Province were sown on wheat bran to highlight an "early" character. However, the emergence characteristics of soybeans have higher requirements on the height of wheat stubble and the quality of straw crushing, and their growth and development characteristics are also different from those of spring soybean.
First, species selection should use soybean varieties with obvious precociousness. From June 15th onwards, growth period should be 90-100 days. At the same time, during the growth and development of summer soy, it is the season of high temperature, high humidity, and grassiness. It requires varieties with high disease resistance, strong adaptability, high yield potential, and special grain quality.
Second, the former processing and sowing in order to grab the seeds as soon as possible to sow, summer soybeans rushed to the time for preparation, often after the wheat harvest after the lack of public opinion, so the late wheat filling water to be filled with irrigation, and strive to achieve a dual purpose, ensure that soybean seeding Lyrical demand. Summer sowing soybeans require wheat to be kept at about 20 centimeters. The comminution of the straw should be fine and uniform, and it must not affect the phenomenon of opener passing through. Moreover, the procedure should be simplified as much as possible during the entire harvesting and rinsing process, and the soil should not be over-tightened, affecting the rooting and emergence of soybeans.
Third, sowing quality requirements
1, through the selection, drying to improve the purity and quality of seeds, so that the germination rate of 90%. According to the production conditions, the use of coating, ammonium molybdate seed dressing, rhizobia seed dressing, etc., lay the foundation for improving seedling quality.
2. Adjust the sowing depth to 3-4 cm according to the texture of the soil and the moisture content. The uniform grain size, consistent depth and depth, and the quality of seed and soil cover are all good. Fertile land with strong branching, early sowing of the round-leaved varieties, reference density 1.5-1.8 million; axillary branches, seeding late varieties, reference density of 2-30000 strains. Line spacing 40-50 cm.
Fourth, the management of no-tillage sowing of summer soybeans, due to the special nature of the season and farmland ecological conditions, often weeds occur seriously, will affect the growth of soybeans. Soybeans should be chemically weeded before the seedlings are sown by the combination of soil treatment and stem-leaf treatment. It is also necessary to strengthen the cultivating, weeding and soil loosening and promote seedling growth. According to experience, the key is to eliminate grassland before soybean ridges are enclosed.
Summer soybeans have a short growing period and cannot be over-seeded. To achieve growth can not lack of water and fertilizer, promote the formation of a certain degree of flourishing vegetative body as soon as possible before flowering. Sufficient water supply during the flowering stage can effectively reduce the loss of calyx and increase the weight of one hundred grains. The soil moisture content at the seedling stage should be maintained at about 20%, and it should be maintained at more than 20% during the flowering stage. Base fertilizer and sowing layer deep or lateral application, based on 30 kg of compound fertilizer (8:10:7) per mu, topdressing 5-10 kg of ammonium sulfate during flowering. After emergence, pests and diseases are easy to occur, especially after ridge-sealing.
When the clams are dry and the old yellow leaves fall off, they must be harvested in time to prevent cracking before harvesting.
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