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- Title
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.
- Authors
赵慧君; 姚东瑞; 孙林鹤; 崔键; 常雅军; 曹建军
- 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 that the 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.
- Publication
Acta Agriculturae Zhejiangensis, 2021, Vol 33, Issue 8, p1477
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.2021.08.15