论文部分内容阅读
选具有近4个纬度差异,地处2个不同气候带的玉溪市通海县和昭通市鲁甸县2个生态烟区,研究了K326、红花大金元和KRK26烤烟品种在旺长和成熟期的稳定碳同位素(δ13C)分布值对气候环境的响应。结果表明,3个品种烟叶δ13C值的范围为-26.56‰~-24.36‰,旺长期烟叶δ13C值表现为通海大于鲁甸,成熟期除KRK26外,δ13C值表现为鲁甸大于通海。对比旺长期和成熟期,两地各品种的δ13C值都表现为成熟期大于旺长期,即随着烟叶成熟度增加,分布在2个气候带烤烟的水分利用效率都在逐渐提高。品种间比较表明,无论是旺长期还是成熟期,通海都表现为KRK26的δ13C值最大,鲁甸则表现为红花大金元的δ13C值最大。而3个品种下部叶和中部叶δ13C的平均值都表现为通海大于鲁甸,且均与旺长期表现出一致的规律,支持温度较高,日照时数较长,降水量较少,δ13C值越大的结论。
Two ecologically friendly tobacco growing areas, Tonghai County, Yuxi City and Ludian County, Zhaotong City, were located in two different climatic zones. The effects of K326, Hongda Daikin and KRK26 on the growth and maturity Response of the Stable Carbon Isotope (δ13C) Distribution to Climate and Environment. The results showed that the δ13C values ranged from -26.56 ‰ to -24.36 ‰ in three cultivars. The δ13C value of the long-term tobacco leaves was larger than that of Ludian, and the δ13C value of the mature tobacco leaves was higher than that of the sea through Lu13. Compared with Mongolian and Mongolian cultivars, the δ13C values of all the cultivars in both cultivars were higher than that in Mongolian ones, that is, with the maturity of tobacco growing, the water use efficiency of flue-cured tobacco distributed in two climates increased gradually. The comparison among cultivars shows that the δ13C value of KRK26 is the highest in Tonghai, and the largest δ13C value in Dahua Yuan of Honghua, in Lundian, no matter in long-term or mature stage. While the δ13C values of the lower and middle leaves of the three cultivars showed the same trend as that of Tonghai over Ludian, and both showed consistent laws with Mongolian long-term, supporting the higher temperature, longer sunshine duration and less precipitation, and the δ13C value The bigger the conclusion.