【摘要】 <正> 酸雨是当今世界上面临的重要环境污染问题之一,酸雨对森林、农作物的影响已引起人们的关注。在我国,酸雨主要发生在长江以南,尤以四川、贵州为严重。局部地区酸雨发生频率较高,小于pH4的酸雨时有出现,对森林及农作物已产生一定的危害。笔更多还原

【Abstract】 Results of the experiment showed that growth of tomato (Lycopersicum esculentum) could be affected by si-mubred acid rain in two soils (fluviogonic soil and acid yellow soil). The pH values of die simulated acid rain were 4.5, 3.5, 2.5 and 5.6 (ck) respectively. There appeared visible injurious symptoms (chlorosis and nreroses) on the leaves of tomato after the simulated rain at pH 2.5 was sprayed. However, at pH 4.5, the symptoms were slight. Owing to increases of acidity of 4.5. 3.5 and 2.5, the fresh of tomato fruit weighed decreasingly by 13.8% 34% and 38.2% in fluviogonic soil respeclively and 3.5% (pH 4.5) and 28.8% (pH 2.5) in acid yellow soil.更多还原