ZHENG Zhilin,LUO Youfa,ZHOU Jiajia,et al.The Fraction Characteristics of Phosphorus in the Rhizosphere of Four Pioneer Restoration Plants in Lead-Zinc Waste Slag Yards[J].Research of Soil and Water Conservation,2019,26(03):269-278.
铅锌废渣堆场4种先锋修复植物根际微域磷素赋存形态特征
- Title:
- The Fraction Characteristics of Phosphorus in the Rhizosphere of Four Pioneer Restoration Plants in Lead-Zinc Waste Slag Yards
- Keywords:
- lead-zinc smelting residue; phytoremediation; microdomains in the rhizosphere; phosphorus; occurrence forms
- 分类号:
- X53;X171.5
- 摘要:
- 为明确先锋植物根际微域中磷素赋存形态特征对铅锌废渣堆场生态修复的响应，选取黔西北土法炼锌废渣堆场植物生态修复5年后区域内长势良好的大叶醉鱼草（Buddleja davidii）、土荆芥（Chenopodinm ambrosioides L.）、三叶草（Trifolium repens）及黑麦草（Lolium perenne）4种先锋植物根际微域废渣为研究对象，分析了不同植物根际微域及无植物（对照）废渣中无机磷（IP）、总无机磷（TIP）、有效磷（AP）、有机磷（OP）、总磷（TP）含量及pH和有机质变化情况。结果表明：与对照废渣相比，4种先锋植物的定植可显著降低废渣基质pH（p<0.05），但根际与非根际废渣均仍呈弱碱性（pH7.43～7.86）；同时，不同植物均可促进铅锌废渣中有机质的积累，其中，大叶醉鱼草、土荆芥及三叶草均可显著（p<0.05）提高植物根际废渣中的有机质。不同植物根际微域中磷素的含量均高于对照并存在差异，其中大叶醉鱼草、土荆芥、三叶草根际废渣中总磷、有效磷与各无机磷形态的含量高于非根际，而黑麦草则与其他3种植物呈相反的变化规律。4种植物对废渣中无机磷的吸收和利用较为充分，且对有机磷具有一定的富集，具体表现为4种先锋植物根际废渣中TIP/TP比值（48.17%～60.70%）明显低于对照（89.97%），而OP/TP比值（39.80%～51.83%）高于对照（10.03%）。铅锌废渣堆场植物修复5年后不同先锋植物的生长均促进废渣中磷素和有机物的生物地球化学循环，可为渣场生态系统中群落自然演替或后续木本植物的建植提供有利的基质条件。
- Abstract:
- In order to clarify the response of phosphorus fraction characteristics in the rhizosphere microdomain of the pioneer plant grown in the lead-zinc waste slag yard of ecological restoration, the the zinc smelting waste slag yard of ecological restoration in the northwestern Guizhou Province was selected. Four species of Pioneer plants, Buddleja davidii, Chenopodam ambrosioides L., Trifolium repens, and Lolium perenne, which grew well in the area, were selected. The contents of inorganic phosphorus (IP), total inorganic phosphorus (TIP), available phosphorus (AP), organic phosphorus (OP) and total phosphorus (TP) in the rhizosphere micro-domains and control residues were analyzed. The results showed that compared with the control residue, the four kinds of pioneer plants could significantly reduce the pH of the waste residue matrix (p<0.05), and both the root and non-root residue were still weakly alkaline with pH value between 7.43 and 7.86; the four kinds of pioneer plants could significantly increase the accumulation of organic matter in the lead-zinc waste residue matrix; the content of organic matter in the plant root waste residue was significantly higher than the control residue (except Lolium perenne); the absorption and utilization of inorganic phosphorus in waste slag were obvious in the four species of pioneer plants; the specific characteristic was that the ratios of TIP/TP (48.17%~60.70%) and OP/TP (39.80%~51.83%) in the four pioneer plant root systems. The ratios of TIP/TP in the pioneer plant root systems were less that TIP/TP (89.97%) of the control, and to OP/TP in the pioneer plant root systems was higher that (10.03%) of the control residue. The contents of phosphorus in rhizospheric microdomains of four species of pioneer plants were higher than that of the control residues. The contents of phosphorus in the microdomains of plant rhizospheres differed due to the plant species, which represented three kinds of pioneer plants (Buddleja davidii, Chenopodinm ambrosioides L., Trifolium repens), the root rhizosphere effect was significant in the root slag, and the contents of total phosphorus, available phosphorus and inorganic phosphorus in the root waste slag were higher than those in the non-root, while those in the Lolium perenne were opposite to those in the other three plants. Five years after the phytoremediation of the lead-zinc waste slag yard, the growth of different pioneer plants promoted the biogeochemical cycling of phosphorus and organic matter in the waste slag, which could be a natural succession of the community in the slag field ecosystem or a subsequent increase in the establishment of large-scale woody plants provided favorable substrate conditions.
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备注/Memo
收稿日期:2018-07-13;改回日期:2018-08-10。
基金项目:贵州省国内生态学一流学科建设项目（GNYL （2017）007号）；国家自然科学基金（41663009）；国家自然科学基金—贵州省联合资助项目（U1612442-3）；贵州省教育厅自然科学研究项目（黔教合KY字（2016）011）；贵州省教育厅研究生教育创新计划项目（黔教研合GZZ字（2016）07）
作者简介:郑志林(1992-),男,江西峡江人,硕士研究生,主要从事生物地球化学与污染生态修复研究。E-mail:zlzheng92@163.com
通讯作者:吴永贵(1972-),男,贵州纳雍人,博士,教授,博士生导师,主要从事污染生态效应,污染生态控制及环境生态修复方面的教学研究工作。E-mail:ygwu72@126.com