摘要
光合作用是决定作物产量的重要因素,进行棉花光合日变化特性研究,对于探究棉花干物质积累规律和增产机理均有很大的指导意义。采用CB-1102型光合蒸腾作用测定系统,研究棉花花铃期光合指标的日变化规律。结果表明,净光合速率的日变化曲线为光合日变化模式之一的双峰型,光合速率的峰值分别出现在10:00时和15:00时,13:00时左右出现午休现象。蒸腾速率的日变化规律呈双峰型,峰值出现在11:00时和15:00时左右。气孔导度的日变化规律也呈双峰型曲线,峰值出现在10:00时(小峰值)和15:00时左右(大峰值)。胞间CO2浓度呈现斜"V"字型的日变化规律,12:00时为全天最低值。
Photosynthesis is the important factors for yield formation, research on Diurnal Variation of Photosynthesis have guiding value for exploration the Rule of dry matter accumulation and yield-increasing mechanism of cotton.With CB-1102 Portable Photosynthetic System, the photosynthetic rate of cotton leaf was studied at blossoming and boll forming stage. The results showed that daily changes of net photosynthetic rate presented a bimodal curve, peak value appeared at 10：00 and 15：00, midday depression appeared at 13：00; transpiration rate presented a bimodal curve, peak value appeared at 11：00 and 15：00; stomatal conductance presented a bimodal curve, peak value appeared at 10：00 （small） and 15：00 （maximum peak）; Variation of intercellular CO2 concentration appeared ＂V＂ shape, lowest value appeared at 12：00.
出处
《农学学报》
2012年第6期6-9,共4页
Journal of Agriculture
基金
山西省科技攻关项目(20110311004-1)
山西省农业科学院重点招标项目(YZD1012)
关键词
棉花
净光合速率
蒸腾速率
气孔导度
细胞间隙CO2浓度
日变化
Cotton
Net Photosynthetic Rate
Transpiration Rate
Value of Stoma Conductance
Intercellular CO2 Concentration
Daily Changes
