Growth and agar quality of Gracilaria heteroclada (Zhang et Xia) grown in a filter tank

Issue Date

12-2006

Abstract

Gracilaria heteroclada Zhang et Xia was grown in filter tanks to determine the growth, agar quality and uptake pattern of nitrogen and to observe the water quality in recirculating water system with seaweed.
Rapid uptake of nitrogen in G. heteroclada was observed within the first 24th of culture. Filling up of the nitrogen pools in the cell may have continued until the fifth day, the plants started to increase in weight, proportionate to the uptake rate of nitrogen duing the experiment. G. heteroclada stocked at 1 kg m-2achieved a specific growth rate (SGR) of approximately 10.4% d-1 during 15d of culture, at total ammonia-nitrogen and nitrite-nitrogen levels of 0.03-0.27 mg L-1 and 0.04-0.19mg L-1, respectively, in the filter tank. Approximately 11% of nitrogen in the water was removed by the seaweed.

Source or Periodical Title

Philippine Agricultural Scientist, The (Formerly: The Philippine Agriculturist)

ISSN

0031-7454

Volume

89

Issue

4

Page

359-362

Document Type

Article

College

College of Agriculture and Food Science (CAFS)

Frequency

quarterly

Physical Description

graphs ; references

Language

English

Subject

biofilter, Gracilaria, growth, gel strength, nitrogen

En – AGROVOC descriptors

GRACILARIA; SEAWEED CULTIVARS; SEAWEEDS; ALGAE; GROWTH; AGAR; NITROGEN CONTENT; FILTERS; CULTURE TANKS

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