摘要
盆栽试验结果表明，降尘、酸雨可降低酸性紫色土莴笋茎、叶鲜重３．９％－１４．４％；复合污染对莴笋的减产量增大，且以酸性紫色土为高。降尘、酸雨对蔬菜的促长作用使莴笋早衰减产、小白菜增产。酸性紫色土各处理较对照明显提高两种蔬菜叶细胞透性（电导值、Ｋ＾＋外渗增量达９．５％－１２７．７％），作物种类间变化规律不同。复合污染明显使两种蔬菜Ｖｃ和水溶性氨基酸降低、莴笋硝酸盐增高，蔬菜品质变劣。
A pot experiment was adopted to study the biological effects of dust, simulated acid rain and their combined pollution on vegetable crops in two purple soils. The results showed that stem and leaf fresh weight of lettuce decreased 3. 9%-14. 4% by dust and acid rain in acid purple soil.The growth promotion of dust and acid rain on vegetable plant resulted in a lower yield of lettuce due to early ageing, but that of Brassica chinensiss L. was improved. Dust and acid rain enhanced the osmosis of vegetable leaf cell membrane (the values of electric conductivity and quantity of K￣+ seepage increased by 9. 5%-127. 7% as compared to the control) in acid purple soil,however their change tendencies which was different between two vegetable species. Dust combine with acid rain depressed obviously the vitamine C, soluble amino acid of two vegetables and raised nitrate content of lettuce.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1996年第4期461-468,共8页
Acta Scientiae Circumstantiae
关键词
降尘
酸雨
复合污染
蔬菜
紫色土
dust,acid rain, combined pollution, vegetable, purple soil.
