Analysis Of High-yield Factors And Technology Integration Of Soybean And Corn Rotation In Nenjiang Region

The soybean planting area and output in northeast China account for 1/3 of the country.With the growth of the population and the improvement of people’s living standards,the demand for highquality plant protein will increase,and the demand for soy products will continue to grow.Due to China’s limited arable land,China’s soybean production cannot meet the demand,and it needs to import a large amount every year,and its dependence on foreign countries exceeds 80%.In 2020,soybean imports exceeded 100 million tons.Under the premise that the total amount of arable land is limited,the soybean planting area cannot be expanded indefinitely.Therefore,it is necessary to solve this problem from the perspective of increasing soybean yield.To increase yield,yield potential can be increased through variety improvement,a supporting cultivation technology system can be established,and the yield potential of varieties can be fully exerted to improve yield.In this experiment,the soybean-corn rotation system was used as the experimental research object to analyze the impact of soil testing formula fertilization and conventional fertilizer fertilization on yield.Then,reasonable field indicators were measured from the aspects of varieties,planting density,field management and soil fertility changes.At the same time,satellite remote sensing and UAV aerial photography are used to monitor and manage the entire planting planning and research area in an all-round way.In terms of ecological conditions,nutrient demand,yield structure and material accumulation distribution,the basic law of high yield will be clarified,and supporting technologies will be established.Through the analysis and research of soybean-maize production potential at different production levels,the key limiting factors and technical demand structure affecting the realization of different yield targets can be identified,and the key influencing factors of high-yield cultivation of soybean-maize rotation in key agricultural ecological zones in Heilongjiang Province can be determined,which will lay an important technical foundation for China’s soybean-maize high-yield research and large-scale high-yield technology demonstration and promotion.The main findings are as follows:(1)Soybean and corn varieties with strong convergence and stress tolerance adapted to cultivation in the alpine area of Nenjiang were screened.(2)The basic fertility of Nenjiang area was clarified by using soil testing formula fertilization technology;Fertilization methods determined based on soil fertility measurements can effectively increase soybean yields and save costs.(3)The effect of the new biological microbial agent on the emergence and yield of soybean seedlings was clarified,and the soybean seed coating technology suitable for our department was screened.(4)According to the density test results,the optimal planting density of soybean and corn to maintain high yield was proposed.(5)Satellite remote sensing technology combined with UAV aerial photography can improve the field management level of soybeans and corn.(6)One set of integrated soybean and corn high-yield cultivation technology.