论文部分内容阅读
为了解彭水山地烟叶的光合特性,设置种植密度和留叶数2个试验因素,以烤烟(Nicotiana tobacum L.)品种云烟97为材料,于2012年研究了不同栽培技术对烤烟烟叶光合特性的影响。结果表明:在A1B1(种植密度为13 500株/hm2、留叶数14片/株)处理下,净光合速率、气孔导度、蒸腾速率等均处于最大值,而胞间CO2浓度在A3B3(种植密度为19 500株/hm2、留叶数22片/株)处理下达到最大值。而气孔导度、胞间CO2浓度、蒸腾速率在A2B1(种植密度为16 500株/hm2、留叶数14片/株)处理下最小。尽管叶绿素相对含量在不同处理下表现出不同的变化,但处理间没有达到显著性差异。经过综合分析,在本试验中,彭水山地烟区的烟叶在A1B1处理即较低种植密度和留叶数下烤烟光合特性表现较好。
In order to understand the photosynthetic characteristics of tobacco leaves in Pengshui Mountain, two test factors, planting density and leaf number, were set up. Taking Yunotan 97, a Nicotiana tobacum L. variety, as material, the effects of different cultivation techniques on photosynthetic characteristics influences. The results showed that the net photosynthetic rate, stomatal conductance and transpiration rate of A1B1 (maximum of 13 500 plants / hm2, leaf number 14 / plant) Planting density of 19 500 plants / hm2, leaf number of leaves 22 / plant) reached the maximum value. Stomatal conductance, intercellular CO2 concentration and transpiration rate were the lowest in A2B1 (planting density 16,500 plants / hm2, leaf number 14 / plant). Although the chlorophyll relative content showed different changes under different treatments, there was no significant difference between treatments. After a comprehensive analysis, in this experiment, photosynthetic characteristics of flue-cured tobacco leaves in Pengshui mountainous tobacco area showed better performance under A1B1 treatment, ie, lower planting density and leaf number retained.