水稻糙米砷含量及其与土壤砷含量的关系

ARSENIC CONCENTRATION OF BROWN RICE AND ITS RELATIONSHIP WITH SOIL ARSENIC

筛选低砷含量水稻品种或减少水稻对种植土壤中砷的吸收是控制稻米砷含量最直接有效的办法。本研究采用ICP-MS法测定21份水稻品种在3个试验点的糙米砷含量,结果表明:在3个土壤砷含量由低至高的试验点中,21份水稻品种糙米砷含量平均值也呈现出由低到高的趋势。分析水稻砷含量对不同种植环境的反应,多数品种对不同试验点环境表现的敏感性不一致,但有4个品种表现稳定,如明恢70都表现为迟钝型;明恢86表现为敏感型;明恢72和明恢81为中间型。分析浙优12号在15个栽培点中土壤砷含量、穗茎节砷含量、糙米砷含量的相关性表明,砷含量高低依次为土壤>糙米>穗茎节,土壤砷含量与糙米砷含量的相关性不显著;土壤砷含量与穗茎节砷含量存在不显著负相关;穗茎节砷含量与糙米砷含量之间呈极显著正相关。

Scanning low arsenic concentration varieties or decreasing absorption from growth soil were the most immediate and effective ways to control arsenic concentration in rice.Total As concentration of brown rice was investigated for 21 varieties grown in three field trials using ICP-MS analysis,results showed that averages of total As concentration of brown rice express from high to low according to the total As concentration of growth soil.Analyzing the reaction of varieties to growth environment,it thought that most varieties exhibited different reaction to growth environments,but there were four stable varieties,Minghui 70 consistently exhibited insensitive reaction,Minghui 86 exhibited sensitive reaction,and Minghui 72 and Minghui 81 fell into intermediate category.As concentration of total brown rice,culm and growth soil of variety Zheyou 12 from fifteen tested field trials were measured,the average As concentration were soil brown rice culm in turn.Correlation analyses showed that As concentration of growth soil is no significant correlation to that of brown rice,and no negatively correlation to culm As concentration.But As concentration of brown rice has most positively correlation to that of culm.