摘要： 研究了种植密度和施钾量对烤烟烟叶中部分品质指标的影响。结果显示,在247.5~341.25kg/hm2的钾肥施用量范围内,各部位烟叶的钾、总氮、烟碱、蛋白质含量随施钾量的增加而增加,而还原糖、总糖含量则相应减少,烟叶的化学成分比例趋于合理。但钾肥施用量达到390kg/hm2后,烟叶的品质稍有下降。随种植密度的提高,各部位烟叶的含钾量、还原糖、总糖含量增加,而总氮、烟碱、蛋白质含量则相应降低,烟叶的化学成分趋于协调。烤烟种植密度行株距为1.1m×0.5m,钾肥施用量为292.5~341.25kg/hm2对提高烤烟烟叶的品质最为有利。

关键词: 烤烟, 种植密度, 施钾量, 品质

Abstract: Effects of tobacco planting density and potassium fertilizer application dosage on the quality of flue- curedtobacco leaf were studied in this paper. The results indicated that when potassium fertilizer applicat ion dosage was increased from 2475 to 34125 kg/ hm2, contents of potassium, total nitrogen, nicotine and protein in different parts of tobacco leaves increased, while reducing sugar and total sugar decreased, and chemical components proport ion of tobaccoleaves became suitable.However, potassium fert ilizer application dosage got to 390 kg/ hm2, quality of tobacco leaves decreased. It was also found Increase of tobacco planting density result in contents of potassium, reducing sugar and totalsugar increased; on the other hand, total nitrogen, nicotine and protein decreased; in the end, chemical composition of tobacco leaf harmonized better.The best combinations was tobacco planting density of 11 m( row spacing) 05 m( plantspacing) together with potassium fert ilizer application dosage of 2925- 34125 kg/ hm2.

Key words: Fluecured tobacco, Plant population, K application level, Quality

中图分类号: 

• S572