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Study on strip planting technology of sorghum in mildly saline land and analysis of the mechanism of yield and efficiency increase
Abstract
Sorghum strip cropping can make full use of light and heat resources and increase the production output value per unit of land. This study conducted sorghum & soybean and sorghum & peanut strip technology trials at the Tie ling experimental base in China for three consecutive years from 2021 to 2023, studied the yield and yield traits under different sorghum & soybean and sorghum & peanut ration patterns, and then proceeded to analyze the economic benefits of different ration patterns. The results showed that sorghum & soybean strip planting mode,”4 sorghum + 4 soybean ” is the optimal planting mode, compared with the sorghum clear-cutting, improved the average sorghum plant height, stem thickness, reduced the spike length, and promoted the sorghum's single-plant dry matter accumulation, the sorghum yield per unit area was increased by 11.2 percentage and did not cause a reduction in soybean yields, and to achieve a harmonious symbiosis of soybean and sorghum in the same plot and a season of double harvest. In the sorghum & peanut strip planting pattern, sorghum is kept at 90000 plants per hectare, inter-cropping with peanut can optimise sorghum agronomic traits, improve sorghum yield per unit area, promote sorghum dry matter accumulation, “4 sorghum + 4 peanut” economic benefits are higher than sorghum clear-cutting. Sorghum & soybean and sorghum/peanut are both more conducive to the formation of higher production value under the 4:4 row ratio pattern, which is the optimal ratio
