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烤烟生育期一般分为苗床期和大田期两个时期。本文只谈大田期的施肥技术。在以往的烟草栽培书中,一般把“重施有机肥,无机肥为辅……”作为烤烟的施肥原则。但是目前世界上产烟质量最好的国家,如美国、津巴布韦、加拿大等,他们并不是以施有机肥为主,而是几乎全部施用不同比例的氮磷钾复合化肥及数种适量的微量元素。据我所近两年来试验,得到了同样的效果,完全施用复合化肥,所产烟叶的质量亦较好。烟草从移栽到团棵期(约栽后30天左右),生长缓慢,吸收氮磷钾的数量较小,仅占全生育期总吸收量的7％以下。吸收量最大的时期是在移栽后的45—75天。氮的吸收量占烟株总吸收量的44.12%;磷占总吸收量的50.74%;钾占59.18%。但在烟草生育
Flue-cured tobacco growth period generally divided into two periods of seedbed and field. This article only talked about fertilization technology in the field. In the past, the book of tobacco cultivation, the general “to re-organic fertilizer, supplemented by inorganic fertilizer ...” as the principle of flue-cured tobacco. However, the countries that produce the best quality of tobacco in the world such as the United States, Zimbabwe and Canada are not mainly applying organic fertilizers, but almost all of them use different proportions of NPK fertilizers and several trace elements . According to my tests in the past two years, I got the same result. The complete application of compound fertilizers resulted in better quality tobacco. Tobacco from Transplantation to Mission period (about 30 days after transplanting), slow growth, the absorption of N, P and K less, accounting for only 7% of the total growth during the absorption of less than. The period of maximum absorption is 45-75 days after transplanting. The amount of nitrogen absorbed accounted for 44.12% of the total tobacco plant absorption; phosphorus accounted for 50.74% of the total absorption; potassium accounted for 59.18%. But in tobacco birth