农业环境科学学报2017，Vol.36Issue(3)：428-436,9.DOI:10.11654/jaes.2016-1274
土壤酸碱度对水稻生长及稻米镉含量的影响
Effects of soil pH on growth and grain cadmium content in rice
摘要
Abstract
A pot experiment, with 5 early-rice cultivars and 4 late-rice cultivars, was carried out to investigate the characteristics of growth and grain cadmium(Cd)accumulation in rice under different soil pH conditions. The results showed that the main effects of cultivar and soil pH as well as their interactive effects on agronomic traits and yield were significant(P<0.05), and soil pH had the greatest effects. Yield per plant significantly decreased when soil pH was lower than 5.0 or higher than 7.0. The decrease in yield per plant related to soil pH was mainly due to reductions in number of grains per panicle and seed setting rate. Cd content in polished rice was significantly(P<0.01)affect-ed by cultivar, soil pH and their interaction in early-rice, and the greatest effect was caused by soil pH. In late-rice, both cultivar and soil pH significantly(P<0.01)affected Cd content in polished rice, while their interaction was not significant. Significant(P<0.05)difference was observed in Cd enrichment coefficient among cultivar types. Super hybrid rice had the highest Cd enrichment coefficient, followed by conventional rice and hybrid rice. Growth duration had no significant effect on Cd enrichment coefficient. Cd content in polished rice was significantly(P<0.01)correlated with plant height and yield per plant, showing correlation coefficients of 0.412 and 0.371, respectively. There was no significant correlation between Cd content in polished rice with panicle length, number of grains per panicle, 1,000-grain weight and seed setting rate. In soils with a pH range of 4.0 to 8.0, Cd content in polished rice was significantly(P<0.01)correlated with soil available Cd content before rice transplanting, with a correlation coefficient of 0.710.关键词
水稻/稻米/镉含量/pH值/土壤/有效镉Key words
rice/grain/cadmium content/pH/soil/available cadmium分类
农业科技引用本文复制引用
易亚科,周志波,陈光辉..土壤酸碱度对水稻生长及稻米镉含量的影响[J].农业环境科学学报,2017,36(3):428-436,9.基金项目
农业部、财政部专项"镉低积累水稻品种筛选" （）
国家重点研发计划项目(2016YFD0300509) （2016YFD0300509）
教育部创新团队发展计划项目(IRT1239) The Special Fund of Ministry of Agriculture and Ministry of Finance of China for Screening Rice Cultivar with Low Cadmium Accumulation （IRT1239）
The National Key Research and Development Program of China(2016YFD0300509) （2016YFD0300509）
The Innovation Team Development Program of the Ministry of Education of China(IRT1239) （IRT1239）
