密度与有机氮水平互作对长沙烟区烤烟产质量的影响

Interaction Effects of Planting Density and Organic Nitrogen Rate on Yield and Quality of Flue-cured Tobacco in Changsha

为寻求适合长沙烟区烤烟生长的最佳种植密度和有机氮水平组合,进行了密度与有机氮水平互作对烤烟产质量的影响研究。结果表明,低密低有机氮处理株高最高,为116.20 cm,高密低有机氮处理最大叶面积最大,达到1633.30 cm^2;低密中有机氮处理的有效叶数最多,达到14.65片;增加密度会显著降低烟叶烟碱含量,低密中有机氮水平处理烟叶化学成分最为协调。本试验条件下,低密度高有机氮水平综合经济效益表现最好,产量和产值最高,分别达到2225.1 kg/hm^2和42 844.5元/hm^2。

In order to find out the optimum planting density and organic nitrogen level for flue - cured tobacco growing in Changsha area, the effects of density and organic nitrogen levels on the yield and quality of flue - cured tobacco were stud-ied. Results showed that the plant height was 116. 20 cm at treatment of low density and low organic nitrogen, which was the highest. The largest leaf area was 1633. 30 cm^2 at the treatment of the highest density and low organic nitrogen,which was the maximum. The leaf number at treatment of low density and medium organic nitrogen was 4. 65 leaves,which was the most. The nicotine content of tobacco leaves was significantly reduced by increasing density. The chemical components of tobacco leaves were the best at treatment of low density and medium organic nitrogen. Under the conditions of this ex-periment ,the comprehensive economic benefit was the best at treatment of low density and high organic nitrogen, and the yield and output value were the highest, which reached 2225. 1 kg/hm^2 and 42 844. 5 Yuan/hm^2 Respectively.