Die invloed van kultivar, stikstofbemesting en tophoogte op die kwaliteit van oonddroogtabak II. Chemiese kwaliteit

G. J. Malan, P. Hammes, M. C. Dippenaar
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引用次数: 1

Abstract

The effect of cultivar, nitrogen fertilization and topping height on the quality of flue-cured tobacco. II. Chemical quality. An increasing demand for good quality flue-cured tobacco prompted research to study the effect of some cultural practices on the chemical characteristics of local kultivars. Five flue-cured tobacco kultivars (TL33, A4, OD86, OD224 and OD212) were subjected to three rates of nitrogen fertilization (70, 100 and 130 kg N ha-1) and two topping heights (14 and 18 leaves) in a field trial. An increase in N-fertilization, combined with lower topping, resulted in increased concentrations of N, K, CI and nicotine in the leaf, while sugar content decreased. The K content decreased to the top leaves of the plant, while the concentration of CI and nicotine increased from the bottom. Better quality tobacco was produced where the concentration of nicotine in the leaf was higher with a lower concentration of sugar. A poor relationship between physical and chemical properties was observed.
品种、施氮量和顶高对烤烟品质的影响。2。化学质量。对优质烤烟的需求日益增长,促使人们研究一些栽培方法对地方栽培品种化学特性的影响。以5个烤烟品种TL33、A4、OD86、OD224和OD212为试验材料,分别施氮量为70、100和130 kg N hm -1,顶高为14叶和18叶。施氮量的增加,加上较低的打顶,导致叶片中N、K、CI和烟碱浓度增加,而糖含量降低。烟碱和烟碱的浓度由下往上升高,而钾含量由上往下降低。烟叶中尼古丁浓度较高而糖浓度较低的地方生产出质量较好的烟草。物理性质和化学性质之间的关系很差。
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