畢節(jié)地區(qū)初烤煙葉中微量元素含量分布特征研究
Contents of Medium and Trace Elements in Cured Tobacco Leaves in Bijie Area
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摘要: 對(duì)貴州畢節(jié)地區(qū)各縣（市）不同植煙區(qū)域275個(gè)初烤煙葉中、微量元素進(jìn)行了分析,。結(jié)果表明,，畢節(jié)地區(qū)煙葉中、微量元素含量較為適宜,，銅,、鋅、錳,、鐵,、鎂、鈣的平均含量分別為7.89 mg/kg,、40.51 mg/kg,、225.96 mg/kg,、444.72 mg/kg、0.46%,、2.95%,；銅、鋅,、鈣含量處于適中水平,，錳、鐵含量處于較高或高水平,，鎂含量處于較低水平,。錳含量高的煙樣主要分布在畢節(jié)、大方,、黔西,、金沙和納雍；鈣含量高的煙樣主要分布在金沙,、黔西和織金,；全區(qū)煙葉鎂含量普遍偏低。中微量元素在煙葉的不同部位上分布較有規(guī)律,，錳,、鐵、鈣元素的含量隨煙葉部位的上升而下降,，而銅和鋅的含量隨煙葉部位的上升而上升,。Abstract: Experiments were carried out to study the medium and trace elements in cured tobacco leaves in Bijie by analyzing 275 tobacco leaf samples.The results indicated that the average contents of cupper (Cu), zinc ( Zn), manganese (Mn), iron ( Fe), magnesium (Mg) and calcium (Ca) were 7.89 mg/kg, 40.51 mg/kg, 225.96 mg/kg, 444.72 mg/kg, 0.46%, and 2.95%, respectively. Leaves were found with moderate contents of Cu, Zn and Ca, rich in Mn and Fe, yet poor in Mg. The contents of Mn were rich in Bijie, Dafang, Qianxi, Jinsha, and Nayong. The high contents of Ca were found in leaf samples of Jinsha, Qianxi and Zhijin. The content of Mg was relatively lower in Bijie. The contents of medium and trace elements had general pattern in tobacco leaves at different stalk positions.The contents of Mn, Fe, and Ca decreased with the increasing leaf position, which held opposite in the contents of Cu and Zn.
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