施用生石灰对不同品种水稻镉吸收能力的影响

Effects of quick lime on cadmium absorption capacity of different varieties of rice

为探索施用生石灰对水稻镉富集能力的影响,筛选出降低镉富集的实用农艺措施,针对衡东县常见的6个水稻品种在红壤中施用生石灰对镉的富集能力的影响进行比较研究。结果表明,除湘早籼45外,其余品种在施用生石灰后产量均未出现显著下降。施用生石灰可显著降低稻谷中镉的含量。中嘉早17稻谷镉含量最低,陵两优674镉含量最高,差异显著。施用生石灰处理的土壤p H值有所升高,约升高8.90%。但处理前后土壤中镉的含量未发生显著变化。稻米中镉的含量在6个水稻品种中也没有显著差异。

To explore the impact of quick lime on cadmium enrichment capability of rice,and to screen practical agronomic measures which could reduce the accumulation of cadmium,six rice varieties were selected in a field trial in central China. The results showed that,in addition to Xiangzaoxian 45,the yield of other varieties had no significant decrease after application of quick lime. Application of quick lime could significantly reduce the cadmium content in rice. Zhongjiazao 17 had the lowest content of cadmium,and Lingliangyou 674 had the highest content of cadmium,the difference was significant. The p H increased in the soil with quick lime,by 8.90%,but the content of cadmium did not change significantly. The content of cadmium had no significant difference in the six rice varieties.