不同施氮量对烤烟 K326生长发育及产质量形成的影响

摘要

In order to ascertain the optimum nitrogen application rate of flue-cured tobacco variety K326 in Fuzhou tobacco-growing area, we studied the effects of different nitrogen application rates on the growth, development, and the formation of yield and quality of K326 in Yihuang county, Fuzhou city in 2013.The results showed that:along with the increase in nitrogen application rate, the biological yield of K326 increased, and its economic characters and production value per unit area increased first and then decreased.When the application rate of nitrogen increased, the field growth duration of K326 extended, the number of leaves re-duced, the leaf area increased, the content of carbohydrates and K2 O in leaves decreased significantly, while the content of total ni-trogen and alkaloid in leaves increased significantly.The application of 135 kg/hm2 nitrogen resulted in proper yield, the highest production value per unit area, harmonious inherent chemical compositions, and better appearance quality and smoking quality of K326.%为探明K326在抚州烟区种植所需的适宜施氮量，2013年在抚州市宜黄县烟草科技园进行了不同施氮量对烤烟K326生长发育及产质量形成的影响试验。结果表明，烤烟K326生物学产量随施氮量的增加而升高，经济性状、单位面积产值随施氮量的增加先升高后降低。随施氮量的增加，K326的大田生育期延长，叶片数减少，叶面积增加，叶片内糖类物质、K2 O含量明显降低，总氮、生物碱含量明显增加。在施氮量135 kg／hm2时，K326的产量适宜，单位面积产值最高，内在化学成分协调，外观质量、评吸质量均较好。