Assessment of Fertilizer Application Intervals for Giant Gourami (Osphronemus goramy Lacepede) in Ponds
The experiment was conducted in twelve 400 m2 earthen ponds at Walailak University, Thailand, to investigate the effects of fertilizer application intervals on production performances of giant gourami and pond water quality. Fertilizer applications at 1, 2, 3 and 4-week intervals were replicated thr...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Walailak University
2011-11-01
|
| Series: | Walailak Journal of Science and Technology |
| Subjects: | |
| Online Access: | http://wjst.wu.ac.th/index.php/wjst/article/view/9 |
| _version_ | 1828859021799456768 |
|---|---|
| author | Puan PENGSENG Claude E BOYD |
| author_facet | Puan PENGSENG Claude E BOYD |
| author_sort | Puan PENGSENG |
| collection | DOAJ |
| description | The experiment was conducted in twelve 400 m2 earthen ponds at Walailak University, Thailand, to investigate the effects of fertilizer application intervals on production performances of giant gourami and pond water quality. Fertilizer applications at 1, 2, 3 and 4-week intervals were replicated three times in a completely randomized design. Ammonium phosphate and ammonium sulfate were used at application rates of 9 kg N plus 4.5 kg P2O5 ha-1 (N:P2O5 = 2:1) as a source of nitrogen and phosphorus. Fish of an average weight of 2.2 ± 0.1 g were stocked at 1 fish/m2. After the 120 day trial was finished, the results showed that the survival rate was not significantly different (p > 0.05) but final weights, growth rates and net productions were significantly different (p < 0.05). Fertilizer applications at 4-week intervals showed the highest (average ± SD) final weights, growth rates and net productions which were 37.6 ± 3.4 g, 0.3 ± 0.03 gd-1 and 330 ± 2.5 kg/ha respectively. However, most water quality parameters were not significantly different (p > 0.05) and were in the range for optimal growth of fish. In addition, the result from regression analysis showed that fertilizer application intervals gave a high positive correlation with fish productions (r = 0.76, p < 0.01). In conclusion, the results suggest that fertilizer applications at 4-week intervals could have practical use in the giant gourami ponds to produce fish ranging from 2.2 ± 0.1 - 37.6 ± 3.4 g size during the 120 day production. |
| first_indexed | 2024-12-13T02:10:01Z |
| format | Article |
| id | doaj.art-f961151b8e874708b70758fdcf46dbf0 |
| institution | Directory Open Access Journal |
| issn | 1686-3933 2228-835X |
| language | English |
| last_indexed | 2024-12-13T02:10:01Z |
| publishDate | 2011-11-01 |
| publisher | Walailak University |
| record_format | Article |
| series | Walailak Journal of Science and Technology |
| spelling | doaj.art-f961151b8e874708b70758fdcf46dbf02022-12-22T00:03:03ZengWalailak UniversityWalailak Journal of Science and Technology1686-39332228-835X2011-11-018110.2004/wjst.v8i1.96Assessment of Fertilizer Application Intervals for Giant Gourami (Osphronemus goramy Lacepede) in PondsPuan PENGSENG0Claude E BOYD1Division of Aquatic Animal Production, School of Agricultural Technology, Walailak University, Nakhon Si Thammarat 80161, ThailandDepartment of Fisheries and Allied Aquacultures, Auburn University, Alabama 36849The experiment was conducted in twelve 400 m2 earthen ponds at Walailak University, Thailand, to investigate the effects of fertilizer application intervals on production performances of giant gourami and pond water quality. Fertilizer applications at 1, 2, 3 and 4-week intervals were replicated three times in a completely randomized design. Ammonium phosphate and ammonium sulfate were used at application rates of 9 kg N plus 4.5 kg P2O5 ha-1 (N:P2O5 = 2:1) as a source of nitrogen and phosphorus. Fish of an average weight of 2.2 ± 0.1 g were stocked at 1 fish/m2. After the 120 day trial was finished, the results showed that the survival rate was not significantly different (p > 0.05) but final weights, growth rates and net productions were significantly different (p < 0.05). Fertilizer applications at 4-week intervals showed the highest (average ± SD) final weights, growth rates and net productions which were 37.6 ± 3.4 g, 0.3 ± 0.03 gd-1 and 330 ± 2.5 kg/ha respectively. However, most water quality parameters were not significantly different (p > 0.05) and were in the range for optimal growth of fish. In addition, the result from regression analysis showed that fertilizer application intervals gave a high positive correlation with fish productions (r = 0.76, p < 0.01). In conclusion, the results suggest that fertilizer applications at 4-week intervals could have practical use in the giant gourami ponds to produce fish ranging from 2.2 ± 0.1 - 37.6 ± 3.4 g size during the 120 day production.http://wjst.wu.ac.th/index.php/wjst/article/view/9Phosphorusfertilizerfreshwater fish pondswater qualitygiant gouramiOsphronemus goramy Lacepede |
| spellingShingle | Puan PENGSENG Claude E BOYD Assessment of Fertilizer Application Intervals for Giant Gourami (Osphronemus goramy Lacepede) in Ponds Walailak Journal of Science and Technology Phosphorus fertilizer freshwater fish ponds water quality giant gourami Osphronemus goramy Lacepede |
| title | Assessment of Fertilizer Application Intervals for Giant Gourami (Osphronemus goramy Lacepede) in Ponds |
| title_full | Assessment of Fertilizer Application Intervals for Giant Gourami (Osphronemus goramy Lacepede) in Ponds |
| title_fullStr | Assessment of Fertilizer Application Intervals for Giant Gourami (Osphronemus goramy Lacepede) in Ponds |
| title_full_unstemmed | Assessment of Fertilizer Application Intervals for Giant Gourami (Osphronemus goramy Lacepede) in Ponds |
| title_short | Assessment of Fertilizer Application Intervals for Giant Gourami (Osphronemus goramy Lacepede) in Ponds |
| title_sort | assessment of fertilizer application intervals for giant gourami osphronemus goramy lacepede in ponds |
| topic | Phosphorus fertilizer freshwater fish ponds water quality giant gourami Osphronemus goramy Lacepede |
| url | http://wjst.wu.ac.th/index.php/wjst/article/view/9 |
| work_keys_str_mv | AT puanpengseng assessmentoffertilizerapplicationintervalsforgiantgouramiosphronemusgoramylacepedeinponds AT claudeeboyd assessmentoffertilizerapplicationintervalsforgiantgouramiosphronemusgoramylacepedeinponds |