Effects of Different Treatments with Water Management Combined with Leaf Spraying Silicon Fertilizer on Cd Accumulation in Rice

被引：0

作者：

Wei B.-Y. ^{[1
]}

Zhou H. ^{[1
,2
]}

Liu J.-W. ^{[1
]}

Zhang J.-Y. ^{[1
]}

Huang F. ^{[1
]}

Huo Y. ^{[1
]}

Hu Y.-D. ^{[1
]}

Gu J.-F. ^{[1
,2
]}

Liu J. ^{[1
]}

Liao B.-H. ^{[1
,2
]}

机构：

[1] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha

[2] Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha

[3] Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area, Hengyang

来源：

Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 08期

关键词：

Cd contamination soil; Combined treatment; Rice; Silicon fertilizer; Water management;

D O I：

10.13227/j.hjkx.202002147

中图分类号：

学科分类号：

摘要：

A field experiment involving eight treatments with water management combined with leaf spraying silicon fertilizer was conducted in a paddy field heavily contaminated with Cd (2.83 mg•kg-1) to study the effects of these treatments on rice growth and Cd accumulation in different rice tissues. The results showed that: ① the treatments had no significant effects on rice plant height or number of tillers, but increased the biomass of brown rice by 1.7% to 25.0%. Among the eight treatments, that of water flooding during the rice maturation period plus leaf spraying silicon fertilizer (CY) resulted in the highest amount of brown rice yield. ② The treatment of conventional water management plus leaf spraying silicon fertilizer (Si) had no significant effect on the exchangeable Cd content and TCLP extractable Cd content in soil, whereas the other treatments reduced the exchangeable Cd content by 7.8%-42.6% and the TCLP extractable Cd content by 20.0%-40.8%. ③ The Si treatment could reduce the Cd content in various rice tissues, with an overall decrease of 19. 0% in brown rice. The other treatments significantly reduced the Cd content in various rice tissues. The treatment of moisture during the rice maturation period plus leaf spraying silicon fertilizer (CS) resulted in the highest reduction in the Cd content in brown rice (44. 0%), and was followed by the treatments of batch-type water flooding during the entire rice growth period plus leaf spraying silicon fertilizer (JX; 36.4%), and moisture during the rice pustulation period plus leaf spraying silicon fertilizer (GS; 31.8%). ④ For paddy-fields that are contaminated with Cd to medium and heavy levels, the CS and JX treatments are recommended to manage rice production in order to significantly reduce the Cd content of brown rice whilst having little effect on the rice yield. © 2020, Science Press. All right reserved.

引用

页码：3855 / 3861

页数：6

共 32 条

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