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移栽期对百色地区雪茄烟叶不同叶位生长发育及品质形成的影响

Effects of Transplanting Period on Growth, Development and Quality Formation of Cigar Tobacco Leaves at Different Leaf Positions in Baise

  • 摘要: 以雪茄烟品种云雪1号为研究对象,设置2月28日(T1)、3月8日(T2)和3月18日(T3)3个移栽期处理,系统分析了各处理下烟株生育期的气象条件、生育进程、叶片成熟特征、农艺性状,以及晾制后的物理性状、化学成分、感官品质及经济性状的差异。结果表明:随着移栽期的推迟,大田生育期>10 ℃有效积温显著降低,生育期由78 d缩短至59 d。各叶位烟叶的SPAD值均呈先升后降的变化趋势,移栽期的推迟显著提前SPAD最大值和最小值的出现时间,缩短了成熟采收窗口,其中中下部叶的响应更为敏感。初采至终采期间,SPAD最小值与其出现时间呈显著线性关系,可作为叶片成熟采收的重要生理指标。农艺性状、晾制后物理性状及化学成分整体均以T1处理最优。感官品质和经济性状分析表明,T1处理在香气表现、协调性及茄衣产出率方面具有明显优势。综合来看,百色地区雪茄烟移栽期不宜迟于2月28日,在该日期前移栽可有效促进烟叶叶片结构发育成熟及品质形成。

     

    Abstract: The cultivar Yunxue 1 was used as experimental material. Three transplanting dates were set including February 28 (T1), March 8 (T2) and March 18 (T3). Meteorological conditions during the growing period, growth progression, leaf maturation characteristics, agronomic traits, post-curing physical properties, chemical composition, sensory quality and economic traits were systematically analyzed. The results showed that delaying transplanting from T1 to T3 significantly reduced the accumulated effective temperature during the growing period, and shortened the growth duration from 78 d to 59 d. SPAD values of leaves at all positions exhibited a unimodal pattern, and delayed transplanting significantly advanced the occurrence of both peak and minimum SPAD values, resulting in a shortened harvest window, with middle and lower leaves showing greater sensitivity. From initial to final harvest, a significant linear relationship was observed between the minimum SPAD value and its occurrence time, indicating its potential as an important physiological indicator for determining harvest maturity. Agronomic traits, post-curing physical properties, and chemical composition were generally optimal under the T1 treatment. Sensory quality and economic analysis further demonstrated that T1 exhibited clear advantages in aroma performance, coordination, and wrapper leaf yield. Overall, transplanting cigar tobacco in Baise should not be later than February 28 to promote leaf structural maturation and quality formation.