在可控富营养化条件下浮萍（小眼浮萍）生长中垫料密度效应的综合建模

Comprehensive modeling of mat density effect on duckweed (Lemna minor) growth under controlled eutrophication.

作者信息

Frédéric Monette, Samir Lasfar, Louise Millette, Abdelkrim Azzouz

机构信息

Département de génie de la construction, Ecole de technologie supérieure, 1100, rue Notre-Dame Ouest, Montréal, Qué., Canada H3C 1K3.

出版信息

Water Res. 2006 Aug;40(15):2901-10. doi: 10.1016/j.watres.2006.05.026. Epub 2006 Jul 18.

DOI:10.1016/j.watres.2006.05.026

PMID:16854449

Abstract

The effect of mat density on duckweed (Lemna minor) growth was studied under controlled conditions: 12.5h a day light exposure and 342 mol m(-2) s(-1) light intensity at 20 degrees C. The plant growth was carried out in Hoagland medium for 7 days without harvesting. The results revealed a maximal biomass growth rate of 88 g-dry m(-2) (1,470 g-wet m(-2)) at an optimal initial mat density of 45 g-dry m(-2) (750 g-wet m(-2)), with removal rates for nitrogen (N) and phosphorus (P) of 483 mg-Nm(-2) d(-1) and 128 mg-Pm(-2) d(-1), respectively. A mathematical model that takes into account the mat density was developed in order to simulate the growth of Lemna minor under controlled eutrophication. Based on experiments carried out, the model exhibits a reliability of 89% . The model remains to be validated at the full-scale level.

摘要

在可控条件下研究了浮萍（小眼浮萍）垫密度对其生长的影响：每天光照12.5小时，温度20℃，光照强度342 μmol m⁻² s⁻¹。植物在霍格兰培养基中生长7天，期间不进行收获。结果表明，在最佳初始垫密度45 g干重m⁻²（750 g湿重m⁻²）时，最大生物量生长速率为88 g干重m⁻²（1470 g湿重m⁻²），氮（N）和磷（P）的去除率分别为483 mg-N m⁻² d⁻¹和128 mg-P m⁻² d⁻¹。为模拟在可控富营养化条件下小眼浮萍的生长，建立了一个考虑垫密度的数学模型。基于所进行的实验，该模型的可靠性为89%。该模型仍有待在全规模水平上进行验证。