| To explore suitable intercropping patterns for flue-cured tobacco and soybean in Ankang mountainous area, three soybean interplanting models were implemented.Model 1 involved interplanting one row of soybean in furrows among flue-cured tobacco rows (soybean densities of 313 000 plants/hm2,417 000 plants/hm2,625 000 plants/hm2,125 000 plants/hm2); Model 2 included interplanting two rows of soybean in furrows alongside flue-cured tobacco rows (soybean density of 100 000 plants/hm2); Model 3 incorporated interplanting two rows of soybean on the ridge surface of flue-cured tobacco (soybean density of 100 000 plants/hm2). An experimental comparative study was conducted. The results showed that: (1) both agronomic traits and economic traits of each plant tended to decrease with the increase of density, with the most favorable performance observed in Model 1 (313,000 plants/hm2, 417,000 plants/hm2) and model 2. (2) the yield per unit area and net income of all treatments were similar to those of Model 2 and Model 3, which were significantly higher than that of model 1, and showed an increasing trend with the increase of density in model 1. The results showed that Model 2 was the best interplanting pattern in Ankang, the population structure of soybean was reasonable, the growth potential of individual was strong, the economic benefit of population was high, the yield per unit area was 1399.96 kg per hectare, the net income was 6 158.11 yuan per hectare. This model effectively effectively solved the problems of limited soybean density increase and low yield in Model 1, while avoiding the drawbacks of Model 3, which was heavily impacted by shading and agricultural operations associated with flue-cured tobacco. |
