Journal of Food, Agriculture and Environment
Vol 11,
Issue 3&4,2013
Online ISSN: 1459-0263
Print ISSN: 1459-0255
|
|
|
|
Newsletter
Subscribe to our newsletter and stay up to date with the latest publishes
The dynamics of protease and urease activities in sediment in poly-culture ponds stocking mainly grass carp (Ctenopharyngodon idellus)
Author(s):
Ruibin Yang,
Jinfei Cao, Xinpeng Zhu, Mengjuan Zhu, Xuefen Yang *Recieved Date: 2013-07-24, Accepted Date: 2013-10-12
Abstract:In recent years, there was a high demanding to develop sustainable aquaculture which kept stocking density and pollution loadings under environmental capacity. In order to assess the efficiency of the nitrogen cycle in pond, the protease, urease, TN and NH4+-N contents in sediment in poly-culture ponds stocking mainly grass carp (Ctenopharyngodon idellus) were studied. The results showed that the protease and urease activities in sediment fluctuated during the culture period. TN contents were relative low. NH4+-N contents fluctuated. The results of the Pearson correlation tests showed that there was only a significant positive correlation (p<0.01) between urease activities and NH4+-N contents. This meant that there were no significant substrate induction between protease and the nitrogen, and also no production repression mechanism between urease and NH4+-N in sediment. According to the dynamics of enzyme activities and the nitrogen contents, the nitrogen cycle efficiency was high and there was no nitrogen accumulating in poly-culture ponds.
Keywords:Protease,
urease, poly-culture, sediment, Ctenopharyngodon idellusJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2279-2282
Full text for Subscribers
Information:
Note to users
The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.
Article purchasing
If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.
Purchase this Article: 20 Purchase PDF Order Reprints for 15
Share this article :