【Objective】The present paper aimed to study the impact of organic and inorganic combined application on the organic carbon composition, carbon bank management index and organic carbon functional group of tobacco planting soil in Wuxi county, so as to provide reference for improving the quality of tobacco planting soil and reasonable fertilization.【Method】Four treatments were set up under the condition of constant nitrogen input in field experiment: chemical fertilizer（CF）, chemical fertilizer with mushroom slag organic fertilizer（CMO）, chemical fertilizer with high carbon-based fertilizer（CHB）, and chemical fertilizer with biological organic fertilizer（CBO）.The effect of organic and inorganic application on soil carbon reservoir was studied by measuring total organic carbon and active carbon functional group structure using Fourier infrared spectrometry（FTIR）.【Result】（i） Compared with single organic fertilizer, the soil supplemented with organic fertilizer was slightly increased, and there was no significant difference between the treatments, significantly increased the output value on flue-cured tobacco leaf;（ii） The DOC, MBC content of the soil active carbon bank treated with organic fertilizer was significantly higher than that of single chemical fertilizer treatment.Among them, CMO treatment showed the largest increase in soil DOC content, thus being 67.13%, 12.84%, and 28.54% higher than CF, CHB, CBO, respectively.CBO treatment showed the most increase in soil MBC content, with soil MBC content increasing 42.32% compared to CF and CHB treatment showing 11.43% higher soil EOC compared to CF;（iii）Among the three organic fertilizers, the DOC distribution of DOC, CMO, CBO, EOC, and the carbon bank management index of CHB treatment was significantly greater than CF and CMO;（iv） The structure difference of each treated organic carbon functional group was small, which mainly included phenols, aromatic hydrocarbons, olefins and mesamides.The relative peak area at 1634 cm -1 was associated significantly positively with soil MBC content, and that at 468 cm -1 was associated significantly negatively with soil TOC content.【Conclusion】Compared with single organic fertilizer, soil organic residue organic fertilizer significantly improved soil DOC and MBC content and high carbon-based fertilizer significantly improved soil EOC content and carbon bank management index.Short-term organic and inorganic distribution had little impact on organic carbon functional groups.However, the peaks at 1634 and 468 cm -1 were significantly associated with the soil TOC and MBC content.At the same time, organic-inorganic fertilizer significantly increased the yield and output value of flue-cured tobacco.

为探究不同增碳减氮措施对植烟土壤养分及微生物群落结构的影响,以云烟116为研究对象,设置常规施肥(CF)和3个增碳减氮处理[常规施肥减氮10％,分别加施菇渣有机肥750 kg/hm2(MO)、高碳基肥600 kg/hm2(HB)、生物有机肥750 kg/hm2(BO)],测定其土壤碳氮养分及微生物群落结构.结果表明,MO处理土壤全碳和有机质含量较常规施肥CF分别显著增加了23.62％和25.05％;与CF相比,MO处理酸杆菌门、绿弯菌门两个优势菌门相对丰度更高,慢生根瘤菌属(Bradyrhizobium)相对丰度也明显高于其他处理;HB处理上述菌群相对丰度仅次于MO处理,BO处理上述菌群相对丰度最低,而镰刀菌属、腐质霉属等致病菌属在HB处理中相对丰度最低.研究表明,菇渣有机肥配合减氮措施在促进土壤碳、氮养分释放,改善土壤微生物群落结构,提升养分利用率方面效果最佳.

采集四川省凉山州会东县的103个植烟土壤样品,测定了0～20 cm土壤的盐分离子质量浓度,系统分析了不同海拔及茬口对植烟土壤盐分离子质量分数的影响.结果表明,采样区植烟土壤均为非盐渍化土,含盐量为0.12～0.70 g·kg-1,平均含盐量为0.26 g·kg-1,为中等强度变异.土壤中各盐分离子与总含盐量之间的相关性表现为HCO-3和K+达显著性正相关(P<0.05),SO2-4呈极显著性正相关(P<0.01).不同海拔植烟土壤中阴离子主要以HCO-3和SO2-4为主,其中SO2-4占比较大;阳离子则主要以K+和Ca2+为主.不同茬口种植方式下植烟土壤盐分离子的结果表明,通过前茬作物种植能有效降低植烟土壤中Cl-的质量分数,增加HCO-3的占比频率,同时提升土壤中K+,Na+和Ca2+的质量分数.综合来看,本研究区域中植烟土壤未达盐渍化水平,但土壤中的SO2-4和HCO-3质量分数过高,可能会破坏植烟土壤中阴阳离子平衡,从而抑制烤烟生长,降低烟叶品质.因此,该地区在植烟土壤改良时应关注SO2-4和HCO-3质量分数的变化.

[目的]分析会东县嘎吉基地单元烤烟的感官质量、外观质量、化学成分以及感官质量与外观质量和化学成分的相关关系,了解会东县烤烟的风格和质量.[方法]选取监测点的烟叶样品,进行感官质量、外观品质和化学成分的测定,并进行相关性分析.[结果]会东县烤烟香气质较好,香气较透发,香气量有或稍有,浓度足或稍显不足,整体质量较好.上部叶稍有或微有生青、木质、枯焦等杂气.烤烟上、中部叶以橘黄色或橘色为主,颜色纯正或较纯正;成熟度以成熟或成熟较好为主;叶片结构以疏松为主;身份以中等或适中为主;油分以有或稍有为主、有油润感.烤烟总糖和还原糖含量偏高,其他化学成分含量适宜.经过相关性分析得到,外观质量和化学成分与烤烟的感官质量存在相关关系.[结论]该研究为提升会东县烟叶质量提供理论依据.