Changes in phosphate fractions in prawn aquaculture system at different stages of cropping


134 / 78

Authors

  • P Muhamed Ashraf Central Institute of Fisheries Technology, Cochin 682 029, India
  • A G Gopalakrishna Pillai Central Institute of Fisheries Technology, Cochin 682 029, India

Abstract

Studies were conducted to evaluate the flux of phosphate fractions in prawn aquaculture systems in one cropping season and its relation with water and sediment characteristics. The results from the samples of two scientific and one natural culture ponds revealed that there was no loosely bound P in all the three stages of cropping. Al bound P increased significantly at the harvest stage compared to initial stage. This was attributed mainly to readsorption of P on aluminium hydroxides. The utilisation of iron bound P was in the late juvenile stage and that of Ca bound P at the harvest stage. The inorganic P increased from juvenile to late juvenile stage and at harvest it recorded 22.5-36.7% decrease than the late juvenile stage. In the natural pond total P was reduced due to mineralisation of P. 50% of the organic bound P was mineralised in natural pond during initial to late juvenile stage whereas, organic P has only minor role in scientific systems

Downloads

Download data is not yet available.

Author Biographies

  • P Muhamed Ashraf, Central Institute of Fisheries Technology, Cochin 682 029, India
    Central Institute of Fisheries Technology, Cochin 682 029, India
  • A G Gopalakrishna Pillai, Central Institute of Fisheries Technology, Cochin 682 029, India
    Central Institute of Fisheries Technology, Cochin 682 029, India

Downloads

Issue

Vol. 50 No. 2 (2003)

Section

Articles

License

The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Ashraf, P. M., & Pillai, A. G. G. (2011). Changes in phosphate fractions in prawn aquaculture system at different stages of cropping. Indian Journal of Fisheries, 50(2), 157-166. https://epubs.icar.org.in/index.php/IJF/article/view/7406