Effect of fertilization frequency on pond productivity and fish biomass in still water ponds stocked with Cirrhinus mrigala (Ham.).
By S. Garg, A. Bhatnagar. 2000
89 citations recorded by the source corpus.
Four different fertilization frequencies, namely twice per week, once per week, twice a month and once a month, were used in ponds to assess their effects on nutrient release, pond productivity and fish biomass. All ponds received the same total fertilizer inputs during the experimental period of 60 days (cow dung 208.3 kg ha−1 week−1, TSP 9.8 kg ha−1 week−1, urea 6.0 kg ha−1 week−1). Studies have revealed that the highest values of fish biomass, specific growth rate (SGR), net primary productivity (NPP), plankton population and nutrients were observed in the ponds that were fertilized twice a month. A strong and significant correlation of fertilization frequency was observed with dissolved oxygen, biochemical oxygen demand (BOD), alkalinity, nutrient release, NPP, plankton density (no. L−1), fish biomass and SGR. The linear relationship between NPP and fish biomass/SGR for all the ponds was strong (r2= 0.88). Sediment chemistry revealed that O-PO4, NO3-N, organic carbon and electrical conductivity (EC) increased significantly (P<0.05) with a decrease in the frequency of fertilization, while alkalinity and calcium were high in ponds that were fertilized twice a month.
Subfields: Aquatic Science, Nature and Landscape Conservation
View Paper: https://www.semanticscholar.org/paper/6bfd758c613ffc97a026f82f390b4ccbef386739
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In Aquatic Science
In Nature and Landscape Conservation
Citations in the corpus
- Culture fisheries in village ponds: a multi-location study in Haryana, India. (2010, background): “This increase in these parameters in the wild ponds might be because of unmanaged entry of cattle and domestic waste coming from non-point sources, since these parameters are usually taken as an indicator of pollution (Bhatnagar and Sangwan, 2009; Garg and Bhatnagar, 2000, 2003, 2010b).”
- Distribution of sympatric seahorse species along a gradient of habitat complexity in a seagrass-dominated community (2005, background): “In some aquatic ecosystems, fish biomass responds positively to increases in primary production (Garg & Bhatnagar 2000).”