What is the situation of soybean production in Heilongjiang Province? What are the cultivation techniques?

1. Soybean production in Heilongjiang Province is the most important soybean production base and export base in China, and it is one of the main soybean producing areas in China. With a cultivation history of 3000 years, soybean planting area, total output, unit yield and commodity volume rank first in all provinces and cities in China. In the past 30 years, soybean production in our province has developed steadily.

The outstanding performance is as follows: First, the area is expanding year by year. 1978, the soybean planting area in our province was only 22.88 million mu, reaching 30 million mu in the 1980s and 40 million mu in 2000. Since 2004, the soybean planting area in our province has been stable at more than 50 million mu. It reached 57130,000 mu in 2007 and 59.58 million mu in 2008.

Second, the rate of return rose steadily and then stagnated. In 1970s and 1980s, the soybean yield in our province has been hovering around 90kg. In the late 1990s, the output has been greatly improved, with an average increase of 30% in our province. However, since 2000, the soybean yield in our province has been hovering around100-10 kg, and it only reached 165438 in 2005.

Third, the total output has increased substantially. The sharp increase in unit yield and the rapid increase in area have brought about a significant increase in total soybean output. The total soybean output in our province has increased from about 2 million tons in the 1970s and 1980s to more than 6.5 million tons, with an average of three times.

Soybean planting in our province is mainly concentrated in northern counties and cities such as Qiqihar and Suihua, as well as northern soybean producing areas such as Heihe and eastern soybean producing areas such as Jiamusi, Jixi, Shuangyashan and Mudanjiang. Among them, the soybean area of the State Administration of Land Reclamation is 8 million mu, accounting for 25% of the total soybean area in the province. The annual soybean planting area in Nehe, Nenjiang, Baiquan, Hailun, Fujin, Keshan and Bayan counties and cities is more than 1.20- 1.5 million mu.

2. High-yield cultivation technology of soybean in Heilongjiang Province "Ridge Three" cultivation technology of soybean is the main high-yield cultivation technology mode popularized and applied in our province at present. The application of soybean "three ridges" cultivation technology can reach 260 kg in a small area and 200 kg in a large area. For more than ten years, the cultivation technology of soybean "three ridges" has played an outstanding role in promoting the improvement of soybean yield and quality in our province.

The cultivation technology of soybean "ridge three" is a comprehensive high-yield cultivation technology of soybean with three technologies as the core: subsoiling, deep application and precision sowing. This new technology is a comprehensive high-yield cultivation technology of soybean, which is based on the successful popularization of precision sowing (precision sowing and deep fertilization) in our province, drawing lessons from the practice of subsoiling soil with "three ridges" cultivator developed by "August 1st" Agricultural University, and combining the successful experience of popularizing subsoiling cultivation in our province in the 1970s.

Its main technical points are: mechanical precision sowing twice on the ridge, deep application of chemical fertilizer in layers in the ridge, and deep loosening of the ridge body (platform bottom) in stages.