江苏农业学报2025，Vol.41Issue(10)：1946-1953,8.DOI:10.3969/j.issn.1000-4440.2025.10.008
留叶数与采收时间对上部烟叶成熟特征、产量及质量的影响
Effects of leaf retention number and harvesting time on maturation characteristics,yield,and quality of upper tobacco leaves
摘要
Abstract
To clarify the effects of leaf retention number and harvesting time on the maturation characteristics,yield,and quality of upper tobacco leaves in the tobacco-growing areas of Pu'er City,Yunnan province,this study designed a two-factor ex-periment involving different upper leaf retention numbers and harvesting times.The results showed that,under the same leaf re-tention number,the relative chlorophyll content(SPAD value)of upper tobacco leaves gradually decreased with the delay of har-vesting time.Additionally,retaining six leaves resulted in a higher SPAD value compared to retaining four leaves.The total sugar content and reducing sugar content in fresh tobacco leaves first increased and then decreased with the delay of harvesting time,and retaining six leaves resulted in higher total sugar and reducing sugar contents compared to retaining four leaves.The starch content continuously decreased as the harvesting time was delayed.For cured tobacco leaves,the reducing sugar content,total nitrogen content,starch content,and potassium content showed an overall downward trend with the delay in harvesting time,whereas the petroleum ether extract content first increased and then decreased.The maturity of tobacco leaves gradually improved,while the evaluation scores for oil content,body,color intensity,and color first increased and then decreased.Treatments A2B2 and A2B3 received relatively high compre-hensive evaluation scores of 7.70 and 7.93,respectively.With the delay in harvesting time,the yield,output value,average price,and proportion of top-grade tobacco first increased and then decreased.At the same harvesting time,the yield and output value of tobacco with six retained leaves were higher than those of tobacco with four retained leaves.Treatments A2B2 and A2B3 showed better overall performance in economic traits of tobacco leaves.Based on the results of this study,to enhance tobacco leaf quality and increase farmers'income,it is recommended that tobacco-growing areas in Pu'er City,Yunnan province adopt a practice of retaining six leaves and delay harvesting by 3-6 days compared to the conventional harvesting period.关键词
烤烟/上部叶/留叶数/采收时间/成熟度Key words
flue-cured tobacco/upper leaves/number of leaves retained/harvesting time/maturity分类
农业科技引用本文复制引用
朱雯慧,梁增发,黄瑞寅,张震,谢晋,王媛媛,王维,杨天乐..留叶数与采收时间对上部烟叶成熟特征、产量及质量的影响[J].江苏农业学报,2025,41(10):1946-1953,8.基金项目
广东中烟工业有限责任公司项目(2021440000340011) （2021440000340011）
