Harmonious seeding time/density cultivation method for corn-soybean strip relay intercrops

Abstract

The invention relates to the technical field of crop cultivation, in particular to a harmonious seeding time / density cultivation method for corn-soybean strip relay intercrops. According to the method, the corns are planted in narrow and wide rows; the soybeans are seeded in the wide corn rows from the late June to the middle July each year; and the soybeans are planted according to 9500 to 11500 seedlings per mu. With the adoption of the cultivation method provided by the invention, the soybean output can be effectively stabilized, and the problem of sharp production reduction of soybeans in relay intercropping caused by the fact that the seeding is delayed due to drought, rainfall or manpower shortage in the southeast area of China is effectively solved.

Description

Technical field [0001] The invention relates to the technical field of crop cultivation, in particular to a cultivation method of corn-soybean belt intercropping with coordinated sowing density. Background technique [0002] Soybeans, also known as soybeans, green beans, and black beans, whose seeds are rich in protein, are a crop that integrates grain, feed, and processing raw materials. It is very important for maintaining national food and oil safety, promoting the development of my country's animal husbandry, and improving people’s living standards. effect. In recent years, the soybean planting area in the main grain and bean production areas of Northeast China, North China and Huanghuai has declined sharply, soybean production has decreased, and soybean imports have continued to increase. Survey data in 2012 showed that the soybean planting area was 107.655 million mu, a decrease of 10.68 million mu compared to 2011, and the soybean output was only 12.8 million tons, while t...

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Problems solved by technology

[0004] However, the southwest region represented by Sichuan has obvious seasonal drought characteristics. The frequency of spring, summer and summer drought in this area is as high as 60% to 70%. The drought seriously affects the normal sowing of soybeans; In disaster-prone areas, flood disasters of varying degrees occur from April to October every year. Flood disasters are sudden, frequent, and harmful. Therefore, the best time for soybean planting is often missed in the year when flood disasters occur; May to June coincides with the harvesting of wheat and rapeseed and the season of rice transplanting, which overlaps with the sowing time of soybeans, resulting in a serious shortage of labor force, which leads to a delay of 20 to 30 days in soybean sowing

Therefore, drought, rainfall and labor shortages will delay the soybean planting date.

After the soybean sowing date is delayed, the vegetative growth time of soybeans is shortened, resulting in smaller individual soybean grains. Continuing to plant according to the original planting density and sowing method will seriously reduce soybean yield

Therefore, it is of great practical significance to provide a coordinated cultivation method for corn-soybean strip intercropping sowing density to solve the problem of severe yield reduction of intercropping soybeans due to delayed sowing dates in Southwest my country.

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