关键词: 大豆, 玉米, 复合种植, 专用播种机, 技术要求, 检验验证

Abstract: It is a feasible way for soybean and corn strip compound planting mode to achieve “corn without reducing yield and harvesting more beans for one season”, but it is very different from the existing planting mode in various places in China, which puts forward new requirements for seeding and fertilization operations. This paper systematically combs the characteristics of the planting model, i.e. Firstly, it is precision seeding. Sow corn in single seeds and soybeans in 1 or 2 seeds per hole. Secondly, the row spacing and plant spacing are reduced, planting in a reasonable density. Soybean plant spacing is 7-10 cm, row spacing is 25-30 cm or 40 cm; Corn plant spacing is 8-11 cm or 14 cm, row spacing is 40 cm; Soybean and corn row spacing is 60-65 cm or 70 cm. Thirdly, fertilizer application per unit area is increased, another is decreased. High nitrogen and slow release compound fertilizer for corn is 750-975 kg/hm2, much more than normal level, and low nitrogen and slow release compound fertilizer for soybean is 225-300 kg/hm2, quite fewer than normal level. Fertilizer application in “4+4” and “4+6” planting modes should be increased appropriately. This paper briefly introduces the main contents, qualified indexes and verification methods of the corresponding special seeder, such as the requirements of the safety, applicability and advancement of the special planter for soybean and corn belt compound planting, and the key technical points of verification implementation. This paper expounds the obtaining and limitation of the verification conclusion, and puts forward three suggestions to promote the development of special planter: increasing the configuration and improving the performance; training farmers and perfecting the agronomy; carrying short and long term strategies, patiently cultivate to promote its development.

Key words: soybean, maize, compound planting, special seeder, technical requirement, verification