湖南衡南地区不同烤烟品种特征特性比较

[目的]综合评价湖南衡南地区不同烤烟品种的特征特性。[方法]在湖南衡南地区特定的生态条件下,对当地推广种植成熟的云烟87、K326、中烟201、湘烟3号、贵烟4号进行比较试验,研究品种的适应性、抗病性、经济效益、质量特点和工业可用性等。[结果]K326和云烟87有较好的农艺性状和品种抗病性,产量和产值较高,是目前适合在衡南县种植的最佳品种,能彰显当地浓香型特色烟叶质量的特性。[结论]该研究可为湘南地区烤烟新品种的选育、推广及生产实际提供依据。

Study on Application Effect of Earthworm Manure on Tobacco in Hengnan

Objective] This study was conducted to investigate the effect of earth-worm manure on agronomic traits, yield and quality of flue-cured tobacco. [Method] A field experiment was carried out to investigate the effects of different amount of earthworm manure on growth and economic benefit of tobacco. [Result] The results showed that： the application of earthworm manure could promote vegetative growth of tobacco to different degrees, and significantly increase high-grade tobacco yield and output value, thereby increasing the total output value of tobacco. Among the different application amounts, basal application of earthworm manure 4 500 kg/hm2 could significantly increase the proportion of high-grade tobacco and tobacco output, improve benefit and maintain sustainable production capacity. [Conclusion] This study provides a theoretical basis for the improvement of tobacco-planting soil with earth-worm manure.

烤烟打顶后赤霉素和2,4-D联合施用对上部烟叶产质量的影响

在衡南地区田间试验研究了烤烟打顶后喷施,不同浓度赤霉素(GA3)及与根灌2,4-D联合使用,对烤烟上部四片叶产量、质量的影响。结果表明:打顶当天喷施20 mg/kg GA3,且打顶后10 d灌施10 mg/kg 2,4-D对提高烟叶产量,改善烟叶品质效果最为显著;上部四片叶产量比对照提高了5.3 kg/667m2,上等烟比率提高了4.2%,产值提高了124.7元/667m2。两种植物生长调节剂联合施用取得了较好的协调增效结果,对今后的深入研究有一定的启示。

烤烟早花主要诱导因素研究进展综述

烤烟早花是影响烤烟大田期产、质量的重要原因之一,其中环境因子起着关键的调控作用。本文从成花决定、光周期和温度角度对烤烟早花的影响进行了分析和综述。