Photosynthetic values and inorganic nutrient contents of Sungei Ibai, Trengganu [Peninsular Malaysia]
1982
Lokman Shamsudin | Umar Salleh (Universiti Pertanian Malaysia, Serdang, Selangor. Faculty of Fisheries and Marine Science)
Photosynthetic rates and nutrient content measurements of subsurface water samples of four predetermined stations of Sungai Ibai in Trengganu indicated that the wet monsoon period lowers the values of the former while increasing the ammonium nitrogen and dissolved oxygen contents. A seasonal variation in net photosynthetic values is observed, being high during the dry season and low during the wet monsoon season. However the ammonium nitrogen content exceeds that of either nitrate nitrogen or reactive phosphorus the whole year through. In relation, the nitrite nitrogen content is insignificant. The occurrence of high nitrate nitrogen contents could be attributed to increased intrification processes while that of ammonium nitrogen to bactecial mineralization or decomposition
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