不同移栽期烤烟膜下小苗移栽比较试验

为研究不同移栽期对烤烟各时期生长发育的影响,确定宁蒗地区烤烟膜下移栽的最佳移栽期,采用主栽品种云烟87,设3个移栽期(A处理:4月15日;B处理:4月20日;C处理:4月25日)分析不同移栽期对烤烟各生育期的农艺性状和最终经济性状等影响。结果表明:膜下移栽C处理的667m2产量、667m2产值明显高于A处理和B处理,且烤烟农艺学性状和经济性状要好于其他2个处理移栽期,故宁蒗烟区膜下移栽以4月25日为宜。

Application and Comparison of the Two Flued-cured Tobacco Well-cellar Transplanting Techniques in Southwest Prefecture of Guizhou Province

The application of flue-cured tobacco well-cellar transplanting technique un- der film and covering bowl in southwest prefecture of Guizhou province was intro- duced. And the two flue-cured tobacco well-cellar transplanting techniques were compared. Results showed that compared with flue-cured tobacco well-collar trans- planting technique under film, the technique covering bowl had the advantages of protecting ecological environment, reducing labor force and cost, resisting the bad weather and so on. This research provided theoretical foundation for the early appli- cation flue-cured tobacco well-cellar transplanting technique covering bowl in different

烟草掏苗覆土机设计

烤烟膜下小苗移栽技术是一项成熟的烟草移栽技术。针对膜下小苗移栽农艺复杂和机械化技术装备欠缺等问题开展研究,设计一种气动掏苗覆土一体化装置。该装置主要由整体支撑、轮式起土、覆土、掏苗、车载空气压缩机、镇压和株距控制等部件组成,具有株距可调、掏苗覆土同步作业等技术性能特点。在研究结构及工作原理的基础上,结合烟草田垄构造及掏苗覆土作业要求分析,确定掏苗装置、覆土装置、株距控制装置等关键部件的结构参数和运行参数。田间试验结果表明,该装置在标准化田垄工作时,掏苗装置、覆土装置及整机完整作业率在速度为0.5 m/s时表现最佳,覆土量的最佳值为1.5 L,达到烟草种植农艺要求。根据掏苗装置与覆土装置株距保持的积累误差试验数据,绘制散点图并进行直线拟合。通过拟合直线结果预测整机积累误差超过5 cm时,工作次数约为1 900次,稳定行进距离约为950 m,符合使用要求。