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为探索施氮量和种植密度对烤烟生长发育及经济性状的影响,2013年在常宁市进行了氮肥与密度试验。结果表明:相同密度下的烤烟产量与产值随着施氮量的增加而增加,其中施氮157.5、180 kg/hm2的处理其烤烟产量分别比施氮135 kg/hm2处理高6.59%和18.07%,其产值分别高126.0和5488.8元/hm2,单位养分产量分别高79.8和109.5 kg/hm2,单位面积净收益分别高747.6和3639.6元/hm2;且最大施氮量处理产量显著高于其余处理;均价随着施氮量增加而递减。在施氮量157.5 kg/hm2水平下,采用1.2 m×0.4 m和1.2 m×0.5 m种植密度,烟叶产量和效益最佳。
In order to explore the effects of nitrogen application rate and planting density on the growth and economic traits of flue-cured tobacco, nitrogen and density tests were conducted in Changning in 2013. The results showed that the yield and value of flue-cured tobacco increased with the increase of nitrogen application under the same density. The yield of flue-cured tobacco increased by 6.59% and 18.07% respectively when treated with 157.5 and 180 kg / hm2 of nitrogen, , The output value of which was 126.0 and 5488.8 yuan / hm2 respectively, the unit nutrient yield was 79.8 and 109.5 kg / hm2 respectively, and the net yield per unit area was 747.6 and 3639.6 yuan / hm2, respectively; and the maximum nitrogen application rate was significantly higher than the other treatments. The average price decreases with the increase of nitrogen application rate. Under the nitrogen application rate of 157.5 kg / hm2, the planting density of 1.2 m × 0.4 m and 1.2 m × 0.5 m was the best.