After two years of construction, the northeast high-oil and high-yield soybean demonstration project implemented by the state has launched a number of excellent varieties and advanced production technologies of high-oil soybean, which are gradually being produced on a large scale and widely used. On this basis, the demonstration technical expert group of northeast high-oil and high-yield soybean put forward the following suggestions for the production species and technology of high-oil soybean in this region in 2004:

In 2004, Heilongjiang Province and its reclamation areas can continue to select high-oil varieties that have been produced and successfully popularized in large areas in 2003 according to the accumulated temperature and production conditions in different areas. Such as Suinong 11, Suinong 14, Kennong 5, Kennong 18, Kenfeng 9, Hongfeng 9, Baofeng 7, Hefeng 40, Hefeng 41, Hefeng 42, Dongnong 163, Dongnong 46, Heinong 41, Heinong 44, Heinong 45, Kenjian Dou 25, Kenjian Dou 26, Kenjian Dou 27, Kenjian Dou 28, Heihe 19, Heihe 27, Heihe 31 and other high oil varieties. In addition, in 2003, a number of new high-oil and high-yield varieties in Heilongjiang Province passed the national or provincial examination and approval. In 2004, all localities can reasonably select suitable high-oil varieties according to local conditions. It is suggested that the new high-oil varieties to be popularized are Hongfeng 12, Suinong 20 and Hefeng 46.

High-oil soybean varieties such as Changnong 13, Jikedou 1, Jiyu 54, Jiyu 60, Jiyu 58, Jilin 47, Jilin 35, Jiunong 22 and Jinong 9 can be selected for the production of high-oil soybean in Jilin Province.

High-oil soybean varieties such as Tiefeng 31, Liaodou 11, Kaiyu 9, Kaiyu 12, Zhonghuang 20, Dandou 10 and Liaoshou 1 can be selected for high-oil soybean production in Liaoning Province.

The high-oil soybean varieties that can be popularized in Inner Mongolia Autonomous region are Mengdou 9, Mengdou 12, Hefeng 40, Jiangmodou 1, Dongnong 46, North Xinjiang 98Muth385 (strain), Hefeng 42, Jilin 35, Jiyu 47, Kaiyu 12 and other high-oil varieties.

The main cultivation techniques of high-oil and high-yield soybean in Northeast China are in addition to the original high-yield techniques such as mechanical deep loosening, ridge and ridge cultivation (that is, soil deep loosening, deep application of chemical fertilizer, precision sowing techniques) and comprehensive control techniques for continuous stubble. There are the following practical techniques for high yield, which are being or are expected to be further popularized, including:

The narrow row dense planting technology of soybean includes different planting methods, such as "deep narrow density", "big ridge density" and "small ridge density". Soybean "deep narrow dense" cultivation technique is a comprehensive matching technology based on dwarf soybean varieties, with air suction seeder or precision seeder as carrier, combined with deep loosening, deep fertilization and stratified fertilization, and through narrow row close planting to maintain population evenness. "big ridge density" and "small ridge density" are high-yield cultivation techniques developed on the basis of ridge cultivation. These technologies are suitable for demonstration and promotion in most areas, especially in Heilongjiang and Inner Mongolia.

Soybean interrow plastic film mulching technology can preserve soil moisture, increase temperature, control weeds, and promote the activity of soil microorganisms and the effective use of nutrients. Especially in dry years, the effect of drought resistance and yield increase is very significant. The technology can be expanded and popularized in Heilongjiang reclamation area, Heilongjiang and some parts of Inner Mongolia, and demonstration and promotion work can be actively carried out in Jilin, Liaoning and other provinces.

Soybean no-tillage and low-tillage cultivation technology at present, the most feasible soybean no-tillage technology in Northeast China is the original ridge sticking, that is, under the premise of overwintering on the original ridge of corn and other crops, sowing soybean directly on the original ridge after simple rake operation in the coming year. The field operation of soybean planted in the original ridge is less, which can reduce the loss of soil moisture, reduce energy consumption, win agricultural time, facilitate timely sowing, and help to ensure that the seedlings are whole, neat and strong. It is observed that the soybean planted in the original ridge emerged 2-5 days earlier than the deep loose ridge, the seedling emergence rate was 8% higher, and the yield was increased by more than 15% per mu.

In recent years, under the climatic condition of continuous drought and little rain in Northeast China, the effect of soybean irrigation on increasing production and income is very obvious, so the promotion scale of sprinkler irrigation and other water-saving irrigation techniques should be actively expanded in areas with favorable conditions.

Foliar fertilizer spraying soybean needs a large amount of mineral nutrition in the middle and later growth stage (flower and pod stage). Due to the gradual decline of root absorption function and nodule nitrogen fixation ability, it often leads to fertilizer deficiency and premature senescence. In order to meet the nutritional needs of soybean in the middle and later stage of growth, foliar fertilizer spraying technology can be used. Commonly used foliar fertilizers are potassium dihydrogen phosphate, urea, ammonium molybdate, multi-component compound liquid fertilizer and so on. According to the study of Baoquanling Agricultural Administration in Heilongjiang Province, the application of urea + potassium dihydrogen phosphate, multi-component compound liquid fertilizer, rare earth + potassium dihydrogen phosphate, urea + ammonium molybdate increased the yield by more than 10%.

In addition, soil testing and fertilization, deep fertilization and other fertilization methods to increase fertilizer efficiency should be further promoted. Advocate the application of farm manure, implement straw returning to the field, vigorously improve soil fertility, and strive to improve the arrival rate and household entry rate of conventional high-oil soybean high-yield cultivation techniques.