| Abstract: In order to understand the status of soil acidification of vegetables in Liandu district of Lishui city and provide the basis for relevant prevention and control work, a rapid field soil pH value determination method was adopted, the present situation of vegetable acidified soil in 15 villages of Bihu town and 6 villages of Fengyuan town in Liandu district of Lishui city was investigated by measuring soil pH value. The results showed that the soil pH values of 220 sites ranged from 4.1 to 6.5, of which 173 sites were strongly acidic (＜4.5, grade 1) and acidic (4.6-5.5, Grade 2), accounting for 78.6%. The other 47 sites were 21.4% of slightly acidic (5.6- 6.5, grade 3), and none of neutral (6.6-7.5, grade 4), slightly alkaline (7.6-8.5) and alkaline (＞8.5, grade 6). The degree of acidification in protected vegetable field was significantly higher than that in open field. In view of the serious situation of vegetable soil acidification in Liandu district of Lishui city, the improvement technology of applying microbial fertilizer after calcium cyanamide treatment of acidified soil was proposed to increase soil pH value by 0.71 and the content of soil organic matter by 5.8% . |