| 【Objective】The study was conducted to explore the growth and yield formation rule of fresh soybean
in glutinous sorghum and soybean intercropping system, and to objectively analyze the economic benefits of intercropping
system.【Method】The single factor randomized block design was set for 3 cultivation modes, namely, intercropping of two
lines of sorghum and two lines of soybean（A1）, intercropping of two lines of sorghum and four lines of soybean（A2）,
and soybean monoculture（A3）as CK, to analyze the effects of the above 3 modes on soybean agronomic characters, dry
matter accumulation, yield and system economic benefits.【Result】In the intercropping system, fresh soybean（as a low
crop）, affected by the shading of sorghum in the middle and late growth periods, had increased plant height and decreased
stem diameter, specific leaf weight, stem dry matter accumulation, leaf area index and yield character indexes, and the yield of fresh soybean was lower than that of the net crop. Under the intercropping mode, the land equivalent ratio（LER）of A1 and
A2 were 1.43 and 1.47, respectively, indicating that sorghum and soybean intercropping system had significant yield advantage.
For the overall output value, treatment A3 was significantly lower than that of treatment A1 and treatment A2 by 41.5% and
39.3%. For the analysis of economic benefits of different planting modes, in addition to the material cost and labor cost invested
in production, the net incomes of A1, A2, A3 were 7 937.29 yuan/ha, 7 795.29 yuan/ha and 5 449.68 yuan/ha, respectively.
【Conclusion】The A1 cultivation model has the best overall economic benefits, with the optimal yield increase. It can not only
meet the needs of raw materials for wine making, but also alleviate the contradiction between the supply and demand of soybean
in this area. It is an economic and efficient cultivation mode suitable for promotion and planting in this area. |
