水稻施用石灰,是亚洲产米国家普遍采用的一项技术措施。根据国内外研究资料介绍,水稻施用石灰的增产原因与旱地作物不同,和土壤的好氧性pH无关,而与酸性土壤浸水后所产生的低价铁(Fe~(++))或锰(Mn~(++))离子的含量有关,长期 The use of lime in rice is a commonly adopted technical measure in Asian rice producing countries. According to the data from domestic and foreign research, the reason for the increase of output of lime for paddy is different from that of dry land, and has nothing to do with the aerobic pH of soil. However, with the increase of iron (Fe ~ (++)) or manganese Mn ~ (++)) ion content, long-term