广西酸雨形势研究——酸雨通过土壤对值的间接损害及其对策

STUDY ON THE TREND OF ACID RAIN IN GUANGXI——The indirect influence of acid rain on plants and through soil its countermeasure

本文探讨了酸雨从土壤中淋出的物质,和植物对铝的耐受能力,以及铝对植物经济产量的影响.结果如下: 1、根据用pH3.5的酸液模拟淋洗600年,土壤钙、镁、铝被淋出的量表明,柳州市农业土壤可以耐受淋洗200年。 2、几种植物的耐铝阀值是:水稻30-60ppm,白菜60ppm,莴苣和蕹莱<30ppm。 3、在耐铝阀值范围内,对水稻施用氯化钙或氯化钠,对白菜施用氯化钾,有增加经济产量的作用。 4、意外观察到水稻是喜铝植物,最适浓度是30ppm。

This paper is to investigate the substances leaching from soil by acid rain, and the tolerance of plants to the aluminum, one of these substands, as well as the influence of aluminum on economic yield of plants. The results are stated as follows: 1. According to the quantity of calcium, magnesium, and aluminum in soil solution leach by pH 3.5 acid rain in a simulant experiment for 600 years, show that the agricultural soil of Liuzhou city have the capacity to tolerate pH3.5 acid rain leaching for 200 years. 2. The threshold valuesof plants tolerance to aluminum are: oryza sativa 30-60 ppm, Brassica chinese 60 ppm, Lactuca sativa and Ipomoea aquatica<30 ppm. 3. Under threshold value, applying calcium chloride or sodium chloride to oryza sativa,and applying potassium chloride to Brassica chinese would promote their economic yields. 4. By chance, oryza sativa is a like aluminum plant, its optimum concentration is 30 ppm was observed.