Screening Rice Varieties with Low Accumulation of Heavy Metal Elements in Blue Yellow Mud Field of Guizhou Province
A field in situ plot experiment was conducted on farmland soil with moderate to light heavy metal compound pollution to determine the heavy metal content of soil and rice brown rice.Combining the results of rice yield,cluster analysis,and Neiluomei comprehensive pollution index,the aim was to screen rice varieties with low accumulation of compound pollution,in order to explore the differences in the absorption and accumulation abilities of different rice varieties to cadmium(Cd),chromium(Cr),lead(Pb),nickel(Ni),copper(Cu),and zinc(Zn),and screen the rice varieties with low accumulation of heavy metals suitable for planting in the blue yellow mud fields in central Guizhou,using 10 rice varieties mainly planted in central Guizhou in recent years as experimental materials,The results showed that there was a certain field heterogeneity in the content of heavy metals in the root zone soil of different rice varieties,and there was also a certain field heterogeneity between repeats of the same variety.The accumulation of different heavy metal elements in brown rice of different varieties was significantly different,and the overall accumulation ability of heavy metal elements in brown rice of 10 rice varieties was Zn＞Cd＞Cr＞Cu＞Ni＞Pb.There were significant differences in the accumulation of the same typical harmful heavy metal elements among rice varieties.According to the clustering analysis of heavy metal content in brown rice,rice varieties can be divided into three categories:higher value category,intermediate value category,and lower value category.The comprehensive pollution index(Pz)of brown rice of 10 rice varieties ranges from 0.94 to 3.34,ranging from no pollution to severe pollution.Cr is the main contributing element to pollution,and its single pollution index(Pi)ranges from 0.47 to 1.94.The yield of the 10 tested rice varieties ranged from 8 242.8 to 13 434.0 kg/hm2,with an average yield of 10 843.8 kg/hm2,with a significant difference of 47.9％.According to the above research results,it is recommended that Xiangyou 800 be a suitable rice variety with low accumulation of heavy metals for planting in this area.
ricelow accumulation varieties of heavy metalsgrain yieldblue yellow mud fieldsGuizhou
国家科技期刊平台
NSTL
万方数据
维普
