多花黑麦草对不同形态氮的吸收动力学特征研究

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Abstract

The ammonium and nitrate uptake kinetics of Lolium multiflorum Lam. were investigated using the modified depletion method. The kinetic characteristics of ammonium and nitrate uptake by L. multiflorum Lam. could be illustrated with the Michaelis-Menten equation. The maximum uptake rate (V_max) and Michaelis-Menten constant (K_m) were estimated by iterative curve fitting. The K_m for NO₃^-was significantly higher than that for NH₄⁺ in L. multiflorum Lam., which showed that L. multiflorum Lam. preferred NH₄⁺. If hydraulic retention time is long enough, the purifying effect of ammonium by L. multiflorum Lam. will be better in wastewater treatment systems. When absorption system was treated with microbial inhibitors, the absorption rate and K_m of NO₃^- in L. multiflorum Lam. was significantly lower. It illuminated that microorganisms could promote the removal of nitrogen in the system.

Key words： Lolium multiflorum Lam ammonium nitrate uptake kinetics

Received: 25 June 2010

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	Articles by authors
	XIE Li-feng
	LU Kai-hong
	HU Zhi-yong
	ZHANG Ke-xin
	LIU Xia-song

Cite this article:

XIE Li-feng,LU Kai-hong,HU Zhi-yong, et al. Study on the uptake kinetics of ammonium and nitrate In Lolium multiflorum Lam.[J]. , 2010, 29(3): 229-233.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2010/V29/I3/229

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