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通过连续2年的盆栽试验,研究了镁(Mg)、氯(Cl)和硼(B)单施、互作及施肥后效对烤烟(云烟87)农艺性状和经济性状的影响。结果表明,单施B显著增加烤烟的产值,且效果能维持到第2年;单施Mg也有积极的效果;单施Cl对烤烟经济产值无显著影响,是否施Cl要依据土壤中Cl含量和元素互作等因素而定。Mg与Cl按1︰1.51配施对烤烟生长有促进作用,特别在施肥当季作用明显,显著增大中部叶片的长×宽,提高了烤烟产值;Mg与B按1︰0.08配施后效促进了烤烟生长,显著提高了烤烟产值。相比之下,Cl与B按1︰0.05配合施用在施肥当季对烤烟生长有抑制作用,但后效显著增大了上部叶片长×宽,有所提高产值,对烤烟生长表现出一定的促进作用。Mg、Cl与B为按1︰1.51︰0.08结合施用在施肥当季较Cl与B配施及CK表现出一定的促进作用。总之,合理的烤烟施肥措施应考虑营养元素的类型、配施比例、互作及后效。
The effects of single application of Mg, Cl and B on the agronomic and economic traits of flue-cured tobacco (Yunyan87) were studied through two years of pot experiments. The results showed that single application of B significantly increased the output of flue-cured tobacco, and the effect could be maintained until the second year; single application of Mg also had a positive effect; single application of Cl had no significant effect on economic output of flue-cured tobacco, Elements of interaction and other factors. Mg and Cl by 1: 1.51 to promote the growth of flue-cured tobacco, especially in the fertilization season significantly, significantly increased the central leaf length × width, increased the output value of flue-cured tobacco; Mg and B by 1: Promote the growth of flue-cured tobacco, significantly increase the output of flue-cured tobacco. In contrast, the combination of Cl and B at the ratio of 1: 0.05 can inhibit the growth of flue-cured tobacco in the season of fertilization, but the after-effect significantly increased the length of the upper leaves × width and increased the output value, enhancement. The combination of Mg, Cl and B at 1: 1.51: 0.08 showed a certain promotion effect in the fertilization season as compared with the combination of Cl and B and CK. In short, a reasonable flue-cured tobacco fertilization measures should take into account the types of nutrients, the proportion of facilities, interaction and aftereffect.