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近几年来,我市常年性菜地土壤酸化日趋严重.据1982年土壤普查结果,适于蔬菜生长的pH值6.0～7.0范围的莱地仅占32.0%;而pH4.5～5.5范围的强酸性菜地占33.6%,pH小于4.5呈极强酸性菜地占2.5%.菜园土壤的酸化是土壤老朽化的特征之一,它影响土壤肥力的发挥,对耐酸性差的蔬菜生长极为不利.为探索强酸性菜地施用石灰对改良土壤和提高蔬菜产量的效果,1982～1983年进行了试验,获得以下初步结果.
In recent years, the soil acidification of perennial vegetables in our city is more and more serious.According to the results of the 1982 Census of Geography, suitable for vegetable growth in the range of pH 6.0 to 7.0 of Lairdred only 32.0%; and pH4.5 ~ 5.5 range of strong Acidity of vegetable garden is 33.6%, pH is less than 4.5, and acidification of vegetable garden is one of the characteristics of soil degradation, which affects the soil fertility, which is very unfavorable for the growth of poor acid-fast vegetables. To explore the effect of lime application on soil improvement and vegetable yield in strongly acidic vegetable fields, the experiment was conducted from 1982 to 1983 and the following preliminary results were obtained.