不同亚生态烟区烤烟对δ^(13)C值变化的响应

The Response of δ^(13)C Change to Flue-cured Tobacco in Different Ecological Sub-regions

为探明由于经纬度及海拔等地理要素差异对烤烟种植产生的影响,选择云南省大理州弥渡县和祥云县、玉溪市红塔区为试验点,以烤烟品种‘红花大金元’为试验材料,对比分析3地气候条件,δ13C、光合色素、抗性生理特征及化学成分等指标。结果表明,制约烤烟种植的气候要素尤以气温为甚,弥渡与祥云相比,光合色素差异不明显,类黄酮含量及δ13C较高,比叶重差异显著;对比1生理特征变化趋势与对比2类似。从化学成分协调性比较,弥渡烟叶的化学成分较好,祥云及大营街次之,但2地较为接近。对3地烟叶与植烟土壤δ13C的比值进行排序,以弥渡的比值最大,说明弥渡的生态环境最有利于‘红大’的种植。研究以δ13C值为核心,从一个侧面初步解析了‘红大’品种得以在大理州广泛种植的生态原因。

In order to investigate that the differences of geographical, such as latitude and longitude and altitude, impact on tobacco planting, Midu County and Xiangyun County, which in Dali, Camp Street in Yuxi were selected for the test point. The climate conditions, leaf stable carbon isotope composition （δ^13C）, photosynthetic pigments, resistance physiological characteristics and chemical composition were analyzed. The experiment showed that： temperature was the most important factor to influence flue-cured tobacco. Compared with Xiangyun and Midu, photosynthetic pigment had no obvious differences, Midu＇ s flavonoid, δ^13C and LMA were higher. The variation trend of physiological characteristics in contrast 1 was similar with contrast 2. Compared the chemical composition of coordination, the Midu＇ s tobacco chemical composition was better, Xiangyun and Camp Street followed by, but the two were closer. On tobacco and soil＇ s δ^13C ratio for sorting, still Midu＇ s maximum, so Midu ecological environment was the most conducive to ＇Honghuadajinyuan＇ planting. The δ^13C was the core of this experiment, and preliminary explanation that why ＇Honghuadajinyuan＇ was widely cultivated in Dali.