云南低热槽区气候对红花大金元烟叶主要化学成分的影响

在云南低热槽区气候条件下,将烤烟品种红花大金元布局在1550-2100 m 5个海拔点、每个点又安排在4月15日-5月25日5个移栽期进行种植,考查海拔高度和移栽时期对烟叶质量的影响,结果表明：1）烟叶的主要化学成分及其协调性受海拔的影响较大,且在海拔1650-1950 m之间及移栽期4月25日-5月15日期间波动范围较明显.2）烟叶总糖和还原糖分别在17.0%-27.7%和13.6%-24.1%之间,随着海拔的增加而呈上升趋势;糖碱比和施木克值分别在5.5-12.5和2.1-4.1之间,随着海拔的增加呈＂N＂字形变化,这4个指标几乎不受移栽期的影响.3）烟叶烟碱和总氮分别在2.1%-3.5%和1.4%-2.2%之间,且随着海拔的增加呈下降趋势,而随着移栽期的推迟,仅中部烟叶的烟碱含量有一个明显的下降趋势.4）淀粉和氧化钾分别在5.3%-0.6%和2.1%-1.1%之间,且随着海拔的增加呈下降趋势,而随着移栽期的推迟则表现为上升趋势.

Effects on Tobacco Leaves Quality of HongDa Under the Condition of Low Heat Groovy Zone Climate in Yunnan

Under the condition of Low heat groovy zone climate,flue-cured tobacco variety of HongDa was planted in five altitude points from 1550m to 2100m,which five transplanting period were arranged at each point,so as to study effects of altitude and transplanted period to tobacco leaf quality.The results showed that： 1）The main chemical compositions and their ratios of tobacco leaves were influenced by altitude more than transplanting period.They changed obviously with altitude height from 1650m to 1950m and transplanting period from April 25th to May 15th.2）Contents of total sugar and and reducing sugar tended to a rising tendency with increase of altitude.The ratio of the total sugar to nicotine and Shimuke value changed as ＂N＂ pattern with the increase of altitude.3）Contents of nicotine and total N had a declined tendency with the increase of altitude.But only the nicotine of middle leaves had a marked decline with transplanting dates were put off.4）Contents of starch and K2O tended to reducing with the increase of altitude.On the contrary,they had a rising tendency with planted periods postponed.