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| 水芹对畜禽养殖废水中9种元素的累积能力及其生物修复潜力 | |
| 引用本文： | 赵慧君,姚东瑞,孙林鹤,崔键,常雅军,曹建军.水芹对畜禽养殖废水中9种元素的累积能力及其生物修复潜力[J].浙江农业学报,2021,33(8):1477. |
| 作者姓名： | 赵慧君 姚东瑞 孙林鹤 崔键 常雅军 曹建军 |
| 作者单位： | 1.西北师范大学 地理与环境科学学院,甘肃 兰州 7300702.江苏省中国科学院植物研究所,江苏 南京 2100143.江苏省水生植物资源与水环境修复工程研究中心,江苏 南京 210014 |
| 基金项目： | 江苏省农业科技自主创新资金(CX(19)3097);江苏省六大人才高峰高层次创新人才团队(TD-JNHB-008);江苏省省属公益类科研院所自主科研项目(BM2018021-6BM2018021-7) |
| 摘 要： | 为明确水芹对畜禽养殖废水中9种元素的吸收累积能力与生物修复潜力,以畜禽养殖废水为生源要素进行原位实验,研究水芹生长期内不同阶段根、茎、叶中C、N、P、K、Ca、Na、Mg、Fe、Zn等9种元素质量分数的动态变化,化学计量学特征,及其N、P累积量等。结果表明:水芹的C(542.46 g·kg-1)、N(41.35 g·kg-1)、P(7.03 g·kg-1)平均质量分数分别是中国内陆水域水生植物的1.5、1.6和2.1倍。水芹整株对N和P的累积量分别为165.90 g·m-2和119.7 g·m-2,高于凤眼莲修复水体时的氮、磷累积范围。K在水芹茎中的含量最高,而Ca、Na、Mg、Fe、Zn在根中富集。水芹叶片N含量高于同期根、茎中的含量,且叶片对9种元素的综合积累指数显著(P<0.05)高于根、茎部。水芹的C∶N处于9.42~18.55;C∶P处于48.82~194.72,低于全球植物C∶P平均值。水芹N含量与C∶N、P含量与C∶P的相关性随水芹生长而逐渐减弱。水芹不同发育阶段的N∶P为3.59~10.56(<14),说明水芹生长仍受N限制。综上,水芹对畜禽养殖废水中的多种元素具有良好的累积储存能力,是修复重度富营养化水体的优良绿色植物。 |
| 关 键 词： | 畜禽养殖废水 营养元素 化学计量学特征 氮累积量 磷累积量 |
| 收稿时间： | 2020-12-21 |
Accumulation ability and bioremediation potential of water dropwort on nine elements in livestock and poultry breeding wastewater |
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| ZHAO Huijun,YAO Dongrui,SUN Linhe,CUI Jian,CHANG Yajun,CAO Jianjun.Accumulation ability and bioremediation potential of water dropwort on nine elements in livestock and poultry breeding wastewater[J].Acta Agriculturae Zhejiangensis,2021,33(8):1477. | |
| Authors: | ZHAO Huijun YAO Dongrui SUN Linhe CUI Jian CHANG Yajun CAO Jianjun |
| Institution: | 1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China 2. Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China 3. Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China |
| Abstract: | To clarify the absorption and accumulation ability to elements in livestock and poultry breeding wastewater and the bioremediation potential of water dropwort, an in-situ experiment was performed with livestock and poultry breeding wastewater as a nutrient source to study the dynamic changes of 9 elements (C, N, P, K, Ca, Na, Mg, Fe, Zn), stoichiometric characteristics, accumulation of nitrogen and phosphorus, etc, in different organs of water dropwort at different growth stages. It was shown thatthe average mass fraction of C (542.46 g·kg -1), N (41.35 g·kg-1) and P (7.03 g·kg-1) of water dropwort were 1.5, 1.6 and 2.1 times of those of aquatic plants in inland waters of China, respectively. The total N and P accumulation of the water dropwort were 165.90 g·m-2 and 119.7 g·m-2, respectively, which was higher than that of water hyacinth.The highest mass fraction of K was found in the stem of water dropwort, while Ca, Na, Mg, Fe and Zn were enriched in the root. The mass fraction of N in leaves was higher than that in the root and stem, and the comprehensive accumulation index of nine elements in leaves was significantly(P<0.05) higher than that in root and stem.In water dropwort, the C∶N was 9.42-18.55, and the C∶P was 48.82-194.72, which were lower than the global average level. The correlation between N content and C∶N, P content and C∶P decreased with the growth of water dropwort. The N∶P of water dropwort was 3.59-10.56 (<14), indicating that the growth of water dropwort was still limited by N under the expeirment condition.The results informed that the water dropwort with strong accumulation capacity for N and P in livestock and poultry breeding wastewater is an ideal green plant for the restoration of heavily eutrophic water. |
| Keywords: | livestock and poultry breeding wastewater nutrient elements stoichiometric characteristics accumulation of nitrogen accumulation of phosphorus |
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