模拟煤烟降尘对大白菜生长的影响

Effects of Simulated Coal Fly Ash Precipitation on Chinese Cabbage.

本文研究了火电厂煤烟降尘对大白菜生长的影响。研究结果表明,煤烟降尘可明显降低大白菜叶片叶绿素含量与光合强度,破坏大白菜细胞结构,导致大白菜叶片浸提液电导率增大;煤烟降尘可使大白菜可溶糖与粗蛋白质含量明显减少,致使大白菜品质变劣;20t/km^2·月的模拟煤烟降尘量对大白菜产量及品质无显著影响,而30t/Km^2·月的降尘量可使大白菜产量极显著下降,并使品质明显变劣,因此30t/km^2·月的煤烟降尘量是危害大白菜生长的阈值,火电厂的煤烟降尘排放必须低于此值。

The effects of simulated coal fly ash precipitation from a power plant on chinese cabbage (Brassica peknensis Rupr.) were studied。Rates of coal fly ash were 0 (ck), 20, 30, 40, 50, 60, T km^(2-1)Mon.^(-1). The results showed that the ash reduced the chlorophyll content and the photosynthetic rate of the cabbage, and decreased contents of soluble surgar, raw pro tein, but no effecting on vitamine C. The ash also increased electrical conductivity of the cabbage extracting solution because of cells of the cabbage damaged. The cabbage yield and quality were not reduced significantly with 20 Tkm^2-^(-1)Mon^(-1), but the effect of 30 T km^(2-1)Mon^(-1). was obvious, so the acceptabl rate of coal fly ash from power plant should be lower than 30 T km^(2-1)Mon.^(-1).