烤烟品种云烟121关键栽培技术OA

To explore the best cultivation techniques for flue-cured tobacco variety Yunyan 121 in tobacco area of Bijie City,Guizhou Province,effects of fertilization amount,planting density,and remained leaves number on agronomic traits,economic traits,chemic-al composition,and sensory quality of Yunyan 121 were studied by using quadratic saturation D-optimal design.Rresults showed that fertilizer amount and planting density significantly influenced agronomic traits.When nitrogen amount was 119.85 kg/hm2 and planting density was 15 000 plants/hm2,Yunyan 121 exhibited the best comprehensive agronomic performance.Planting density and remained leaves number had a great influence on economic traits.When nitrogen amount was 103.65 kg/hm2,density was 15 000 plants/hm2,and per plant remained leaves number was 16,Yunyan 121 exhibited the best economic traits.Planting density affected chemical quality rel-atively large.When nitrogen amount of 91.05 kg/hm2,planting density of 15 000 plants/hm2,and per plant remained leaves number was 22,Yunyan 121 exhibited the best chemical quality performance.Planting density had a relatively large impact on sensory quality.When nitrogen amount of 87.75 kg/hm2,planting density of 17 610 plants/hm2,and per plant remained leaves number was 19,Yunyan 121 exhibited the best sensory quality.Comprehensive evaluation showed that Yunyan 121 exhibited the best comprehensive per-formance when nitrogen amountwas 88.80 kg/hm2,planting density was 16 860 plants/hm2,and per plant remained leaves number was 17.It was suggested that Yunyan 121 should be further demonstrated and promotion in production.