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选择浙江省典型亚热带经济植物杨梅为对象,通过盆栽试验研究了重度酸雨(pH2.5)、中度酸雨(pH4.0)和对照(pH5.6)处理对杨梅幼苗水分生理特性的影响.结果表明:季节、年份和酸雨对杨梅幼苗的光合速率均有显著影响,各处理中,夏季的差异大于春、秋季,pH4.0处理对光合速率有促进作用;季节、年份、酸雨,季节-年份交互作用以及三者交互作用对气孔导度均有显著影响,各处理在夏季的差异大于春、秋季,酸雨对气孔导度有抑制作用;季节、年份、酸雨及季节-年份和季节-酸雨两两交互作用对蒸腾速率有显著影响,各处理夏季的差异大于春秋季,且pH2.5处理对蒸腾速率的抑制作用最强;酸雨、季节-年份和季节-酸雨交互作用对水分利用率有显著影响,且pH2.5处理对水分利用率有一定的促进作用.
The effects of severe acid rain (pH2.5), moderate acid rain (pH4.0) and control (pH5.6) on the water physiological characteristics of Myrica rubra seedling were studied by pot experiment. The results showed that: the season, the year and the acid rain had a significant effect on the photosynthetic rate of M. bayberry seedlings. The differences of the treatments in summer and autumn were greater than those in the spring and autumn, and the treatments pH4.0 had a positive effect on the photosynthetic rate. The season, year, acid rain, season - Interaction and the interaction of the three had significant effects on stomatal conductance, and the differences of the treatments in summer were greater than those in spring and autumn. Acid rain had inhibitory effect on stomatal conductance. Seasonal, year, acid rain and season-year and season-acid rain two The two interactions had a significant effect on transpiration rate, the difference in summer was greater than that in spring and autumn, and pH2.5 had the strongest inhibitory effect on transpiration rate. Acid rain, seasonal-year and seasonal-acid-rain interaction had significant effect on water use efficiency Affect, and pH2.5 treatment of water use efficiency has a certain role in promoting.