论文部分内容阅读
探明间作玉米穗位叶的光合和荧光特性,对揭示其增强强光利用能力机理具有重要意义。本试验研究了玉米花生间作体系中玉米穗位叶的气体交换参数和快速叶绿素荧光诱导动力学曲线特点。结果表明,与单作玉米相比,间作显著提高了玉米穗位叶处的透光率,穗位叶花后的净光合速率(Pn)、羧化效率(CE)、CO2饱和点(Cisat)、Rubisco最大羧化效率(Vcmax)以及最大电子传递速率(Jmax)大幅提高;JIP-test分析发现荧光诱导曲线中K点和J点没有显著上升,说明强光并未对PSII受体侧和供体侧造成伤害;间作显著提高了玉米穗位叶PSII单位面积吸收(ABS/CS)、捕获(TRo/CS)和用于电子传递的能量(ETo/CS)。这表明玉米花生间作有利于间作玉米穗位叶对光能的吸收,叶片固碳羧化能力的增强,光合速率的提高,具有显著的产量间作优势。
It is of great significance to reveal the photosynthetic and fluorescence characteristics of intercropping maize leaves in order to reveal its mechanism of enhancing the utilization of light. In this study, the gas exchange parameters and fast chlorophyll fluorescence-induced kinetic curve of maize ear were studied in a maize intercropping system. The results showed that compared with single cropping corn, intercropping significantly increased the transmissibility of ear leaves, the net photosynthetic rate (Pn), carboxylation efficiency (CE), CO2 saturation point (Cisat) , Rubisco maximum carboxylation efficiency (Vcmax) and maximum electron transfer rate (Jmax) significantly increased; JIP-test analysis found that fluorescence induction curve K and J point did not significantly increase, indicating that the light does not PSII receptor side and for Body injury; intercropping significantly increased absorption of PSII per unit area (ABS / CS), trapping (TRo / CS) and energy for electron transfer (ETo / CS) in maize leaves. This indicates that the intercropping of maize peanut is beneficial to the absorption of light energy of intercropping maize leaves, and the carboxylation of carbon sequestration of maize leaves is enhanced, and the photosynthetic rate is increased.