Combining mercapto-functionalized palygorskite with zinc affect cadmium phytoavailability and soil microbial activity in rhizosphere soil
文献类型： 外文期刊
作者： Li, Yulong 1 ; Gao, Chao 1 ; Rong, Sashuang 1 ; Gu, Jialin 2 ; Zhao, Huiwei 3 ; Su, Shiming 4 ; Liu, Wei 1 ;
作者机构： 1.Hebei Univ, Coll Chem & Environm Sci, Key Lab Analyt Sci & Technol Hebei Prov, 180 Wusi Rd, Baoding 071002, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing, Peoples R China
3.Natl Semiarid Agr Technol Res Ctr, Sci & Technol Dept Hebei Prov, Shijiazhuang 050051, Hebei, Peoples R China
4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev & Agr, Beijing, Peoples R China
关键词： cadmium; mercapto-functionalized palygorskite; remediation; soil respiration rate; zinc
期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.977； 五年影响因子：5.291 ）
ISSN： 1085-3278
年卷期：
页码：
收录情况： SCI
摘要： Cadmium (Cd) pollution in soil poses a grave threat to human health. Combining various approaches to reduce Cd accumulation in crops is an active area of research to remediate farmlands with medium-high levels of Cd contamination. The Mercapto-functionalized palygorskite (PGS-SH) and zinc (Zn) application alone or in combination were investigated to explore the reduction of Cd uptake by B. chinensis L and transformation of Cd in soil. The sole application of Zn or PGS-SH increased the biomass of B. chinensis L. and decreased the concentration of Cd in plants, but more improvements were observed from the combined application of Zn and PGS-SH. Low concentration of exogenous Zn (50 mg center dot kg(-1)) significantly increased the soil respiration rate (SRR) and the soil dehydrogenase activity (sDHA), while promoted B. chinensis L. growth while inhibiting Cd uptake. However, excessive exogenous Zn (>= 200 mg center dot kg(-1)) significantly inhibited B. chinensis L. growth and soil microbial activity. The combined application of PGS-SH and Zn had the highest sDHA (145.59%) and lowest transport factor (TF) (27.59%) compared with the CK. The combination of PGS-SH and Zn fertilizer is a safe and effective means to reduce the accumulation of Cd in plants and restore microbial activity.
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