时空亏缺灌溉对温室盆栽辣椒生理生态指标的影响

Effect of Space-time Deficit Irrigation on Physiological and Gronomic Features of Hot Pepper in Greenhouse

研究了时空亏缺灌溉对温室内辣椒生理及生长特性的影响,分析了时空亏缺灌溉在辣椒叶片水平上水分利用效率的影响机理。结果表明,时空亏缺灌溉对辣椒株高、叶面积等营养生长指标具有一定的抑制作用,但合理的时空亏缺灌溉却可以显著抑制蒸腾速率Tr,而光合速率Pn下降不明显,复水后Pn又具有超补偿效应,光合产物具有超补偿积累,且可大幅度提高叶片水平上的水分利用效率。

Based on potted experimental data conducted at automatization greenhouse in water-saving park of Hohai university, influence of space-time deficit irrigation on physiological and gronomic features of hot pepper was studied, and the influence mechanism of space-time deficit irrigation on the water use efficiency （WUE） of leaf level of hot pepper was analyzed. The experimental results showed that space-time deficit irrigation had a certain inhibition on the growth of height, leaf area, and other vegetative indexes. However, the moderate space-time deficit irrigation could restrain transpiration rate enormously, but make photosynthesis rate fall slowly. Therefore, WUE of leaf level is considerably improved because the photosynthesis has the compensating effect after rewatering.