秦烟99烤烟在陇县烟区的适宜栽植密度研究

为筛选出适应陇县烟草种植的适宜密度，优化陇县烤烟品种布局并提高烟草产量与质量，通过小区对比试验，对烤烟品种秦烟99适宜栽植密度进行了研究，并对其农艺性状、抗病性、主要经济性状、原烟外观质量进行了评价。结果表明，随着栽培密度的增加，秦烟99大田生育期延长，株高、腰叶减小，发病率增加，经济效益变差，烤烟产量与栽植密度成正相关关系。陇县烟区秦烟99的栽植密度以1.50万株/hm²较为适宜，在该栽培密度条件下，烟叶产量达1 806.0 kg/hm²，产值达到50 433.0元/hm²。

Study on Suitable Planting Density of Qinyan 99 in Tobacco Area of Longxian RegionQIAN Xin - yu1 ZHANG Shi - jie1 WANG Xiao-wei1 WANG Bin-gang1 DENG Xiao - cheng1

Objective ] To screen the appropriate density for tobacco planting, optimize the layout of flue-cured tobacco varieties in Longxian Region and improve tobacco production and quality Method ]The disease resistance, botany traits, agronomic characters and economic characters of Qinyan 99 was studied through the comparative test of the community. Result ] With the increase of planting density, the growth period of the field is prolonged, the plant height and waist size of flue-cured tobacco decrease, the incidence rate increases, and the economic benefit becomes worse. The yield and density of flue-cured tobacco are positively correlated. Conclusion ]The planting density of the tobacco area in Longxian Region is more suitable for 1.5×104 plants/hm2. At this density, the yield of tobacco leaves per hectares is 1806 kg, and the output value reaches 50433 yuan.