防御低温的安全育苗技术对烤烟化学成分及其经济性状的影响

为解决南方烟区低温危害烟苗生长导致苗龄过长等问题，研究不同漂浮育苗技术对烤烟化学成分及其经济性状的影响。结果表明：防御低温的安全育苗移植大田后长势旺，有效叶片数、株高要显著高于常规育苗，烟叶功能期叶绿素和类胡萝卜素含量提高，成熟期烟叶叶绿素和类胡萝卜素的降解推迟和降解速度减慢；同时安全育苗技术有利于提高烤烟淀粉含量，降低烟碱含量，且烟叶烤后化学协调性、均价和上等烟比例与常规漂浮育苗并无显著差异，而产量、产值要明显高于常规漂浮育苗技术，该技术可以在南方烟区进一步推广。

Effects of Defense Low-Temperature Safe Seedling Culturing Technology on Chemical Composition and Economic Character of Flue-cured Tobacco

In order to resolve the influence of low temperature during seedling-breeding on the growth of tobacco in southern tobacco region,effects of different technologies in floating system on chemical composition and economic character of flue-cured tobacco were researched.Results showed that: the safe seedlings with the ability of defending low-temperature had an exuberant growth after transplant,the number of effective leaves and the plant height significantly higher than the normal seedlings,the contents of ch...