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Nitrogen fertilizers promote plant growth and assist in manganese (Mn) accumulation by Polygonum pubescens Blume cultured in Mn tailings soil

文献类型： 外文期刊

作者： Yu, Fangming 1 ; Li, Yi 1 ; Li, Furong 3 ; Zhou, Zhenming 1 ; Chen, Chaoshu 1 ; Liang, Xiaolu 1 ; Li, Chunming 1 ; Liu, K 1 ;

作者机构： 1.Guangxi Normal Univ, Key Lab Ecol Rare & Endangered Species & Environm, Minist Educ, Guilin, Peoples R China

2.Guangxi Normal Univ, Coll Environm & Resource, Guilin, Peoples R China

3.Guangdong Acad Agr Sci, Publ Monitoring Ctr Agroprod, Guangzhou, Guangdong, Peoples R China

4.Guangxi Normal Univ, Coll Life Sci, 15 Yucai Rd, Guilin 541004, Peoples R China

关键词： Antioxidant enzymes; manganese remediation; N fertilization; Polygonum pubescens Blume; reactive oxygen species

期刊名称：INTERNATIONAL JOURNAL OF PHYTOREMEDIATION （ 影响因子：3.212； 五年影响因子：3.275 ）

ISSN： 1522-6514

年卷期：

页码：

收录情况： SCI

摘要： This study examined how different nitrogen (N) forms and application levels promote plant growth and assist in manganese (Mn) remediation of Polygonum pubescens Blume (P. pubescens) cultured in soil with a high Mn level. The effects of ammonium chloride (a) and urea (u), at three application levels (10, 20, and 30 mg L-1 N) and control (no N addition, CK) on the growth, Mn accumulation, and enzymatic anti-oxidative defenses of P. pubescens were examined. In general, both ammonium-N and urea-N promoted the plant mass and height of P. pubescens. The total Mn amount of roots, stems, and leaves in N treatments were higher (p < 0.05) than that of CK. The ammonium-N treatments showed greater plant biomass and Mn accumulation compared to the urea-N ones. In general, the accumulations of Mn, Cr, Zn, and Cu were significantly lower (p < 0.05) in the N fertilizer treatment than those in the control; while the accumulations of Pb were higher (p < 0.05) in P. pubescens across all N fertilizer treatments than those in the control. The N addition decreased the contents of O-2(-) and H2O2 in the leaves of P. pubescens, while increasing the activities of enzymatic anti-oxidative defenses.

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