Nitrogen fertilizers promote plant growth and assist in manganese (Mn) accumulation by Polygonum pubescens Blume cultured in Mn tailings soil |
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| Authors: | Fangming Yu Yi Li Furong Li Zhenming Zhou Chaoshu Chen Xiaolu Liang |
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| Affiliation: | 1. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, The Ministry of Education, Guangxi Normal University, Guilin, China;2. College of Environment and Resource, Guangxi Normal University, Guilin, China;3. Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou, China;4. College of Life Science, Guangxi Normal University, Guilin, China |
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| Abstract: | AbstractThis 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?p?p?P. pubescens across all N fertilizer treatments than those in the control. The N addition decreased the contents of O2? and H2O2 in the leaves of P. pubescens, while increasing the activities of enzymatic anti-oxidative defenses. |
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| Keywords: | Antioxidant enzymes manganese remediation N fertilization Polygonum pubescens Blume reactive oxygen species |
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