烤烟漂浮育苗剪叶中的超越补偿效应研究

烤烟漂浮育苗中,不同的剪叶程度对烟苗的生长产生不同的补偿效应。通过育苗期间剪叶处理及田间试验,研究了不同剪叶程度对烤烟漂浮育苗成苗素质的影响以及移栽后生长发育过程中产生的补偿效应。试验表明,剪叶时剪去5cm以上叶片的1/3有利烟苗产生超越补偿效应,可明显提高烟苗的成苗素质,促进烟株的早生快发,提高烟叶的烤后产值和质量;剪叶程度增加,明显降低烟苗成苗素质,抑制烟株的生长;不剪叶则导致烟株严重早花。

Study of Overcompensation Responses on Float-seeding of Flue-cured Tobacco

There are diverse grade overcompensation responses on float-seeding of flue-cured tobacco. Compensation responses on clipping intensity of float-seeding were studied by cutting management and field experiment. Experimental results indicated tobacco seedlings became more vigorous while leaves exceeding 5cm were cut by 1/3, showing more obvious overcompensation responses, and these seedlings grew quickly after transplanted, there quality and production value were increased. Tobacco seedlings'' growth was restrained while clipping intensity was increased. Plants without clipped trended to early flowering obviously.