以白肋烟TN 86为材料,研究了砍收期对晾制前后上部叶氨基酸含量的影响。结果表明,晾制前总氨基酸含量为124.47~140.78 mg/g,以酪氨酸含量和比例较高,在各个砍收时期天冬氨酸含量为7.78~11.16 mg/g,表现为打顶后4周>6周>5周>3周>2周。晾制前甘氨酸和苏氨酸与砍收时期相关性达显著水平。晾制后总氨基酸含量为73.78~97.77 mg/g,以天冬氨酸比例和含量较高,在各个砍收时期天冬氨酸含量为23.73~31.25 mg/g,以打顶后2周砍收的含量较高,打顶后4周砍收比例较高。天冬氨酸在晾制前含量和比例不高,晾制后却大幅度上升。晾制后甘氨酸、苏氨酸、脯氨酸、异亮氨酸、亮氨酸、酪氨酸、苯丙氨酸和赖氨酸与砍收期相关性达到极显著水平,天冬氨酸、组氨酸、精氨酸、丙氨酸、缬氨酸、蛋氨酸和总氨基酸与砍收期的相关性达到显著水平。砍收时期对晾制后氨基酸含量影响大于晾制前。打顶后2周砍收有利于上部叶天冬氨酸积累和形成。 Using burley tobacco TN 86 as material, the effect of harvesting time on amino acid content in upper leaves before and after air-curing was studied. The results showed that the content of total amino acids before drying was 124.47-140.78 mg / g with high content and proportion of tyrosine, and the content of aspartic acid was 7.78-11.16 mg / g in each harvesting stage, 4 weeks> 6 weeks> 5 weeks> 3 weeks> 2 weeks. The correlation between the glycine and threonine before harvesting and harvesting period reached a significant level. After drying, the total amino acid content was 73.78 ~ 97.77 mg / g, and the content and the content of aspartic acid were higher. The content of aspartic acid was 23.73 ~ 31.25 mg / g at each cut-off time, Received a higher content, 4 weeks after topping cut off a higher percentage. Aspartic acid in the air before the content and the proportion is not high, but after the air drastic increase. After air-curing, the correlation between harvest time, glycine, threonine, proline, isoleucine, leucine, tyrosine, phenylalanine and lysine reached extremely significant level. Aspartic acid, Histidine, arginine, alanine, valine, methionine and total amino acids were significantly correlated with the cut-off time. Harvest period on the air-dried amino acid content greater than the air-cured before. Chopping 2 weeks after topping is beneficial for the accumulation and formation of the upper leaf aspartate.