Title :	Effect Of Common Carp (Cyprinus Carpio) Stocking Size And Density On Production Of Rice And Fish Under Rice-Fish Farming
Material Type:	printed text
Authors:	T. B. Gurung, Author ; H. P. Dhakal, Author ; Wagle, S.K., Author
Pagination:	56-64 p.
Languages :	English (eng)
Abstract:	Evaluation of rice and fish yield at three stocking density of common cmp Cyprinus carpio (4000, 5000 and 6000 Nos/ha) in combination of two stocking size (5-10 g and 10-20 g) along with Sabitri rice was tested in farm er's field at Syanja and Tanahun. In general, 4-5% of rice field was occupied to dug "trench" as refuse for fish during emergencies. During this study, water temperature ranged from 27:±2 to 39:±2 °C. . In general, fish showed rapid growth until first month after stocking then did not changed substantially till harvest in most treatments. Tiller number in control was less than treatments regardless of stocking number and size of fish. Rice yield was slightly higher in treatments than in control ranging .fi'om 4. 7-5.8 Mt.lha, though rice was not planted in trench dug only in treatments. Indeed, rice yield seems to be compensated due to increased number of tillers in treatments. This might also due to pest and weed control and rapid nutrient recycling by fish stocked in treatments. This study demonstrate that production of rice do not decrease with use of rice field as fish trench. However, rice-fish integration could optimize additional income to farmers through fish production, which ranged .fi'om 180-395 kglha depending upon stocking density and size of fingerlings. In treatments fish yield increased with stocking density. Highest fish yield occurred in treatment with combination of large size (LS: 20g) and highest stocking (HS: 6000 Nos) density.

Effect Of Common Carp (Cyprinus Carpio) Stocking Size And Density On Production Of Rice And Fish Under Rice-Fish Farming [printed text] / T. B. Gurung, Author ; H. P. Dhakal, Author ; Wagle, S.K., Author . - [s.d.] . - 56-64 p.
Languages : English (eng)

Abstract:

Evaluation of rice and fish yield at three stocking density of common cmp Cyprinus carpio (4000, 5000 and 6000 Nos/ha) in combination of two stocking size (5-10 g and 10-20 g) along with Sabitri rice was tested in farm er's field at Syanja and Tanahun. In general, 4-5% of rice field was occupied to dug "trench" as refuse for fish during emergencies. During this study, water temperature ranged from 27:±2 to 39:±2 °C. . In general, fish showed rapid growth until first month after stocking then did not changed substantially till harvest in most treatments. Tiller number in control was less than treatments regardless of stocking number and size of fish. Rice yield was slightly higher in treatments than in control ranging .fi'om 4. 7-5.8 Mt.lha, though rice was not planted in trench dug only in treatments. Indeed, rice yield seems to be compensated due to increased number of tillers in treatments. This might also due to pest and weed control and rapid nutrient recycling by fish stocked in treatments. This study demonstrate that production of rice do not decrease with use of rice field as fish trench. However, rice-fish integration could optimize additional income to farmers through fish production, which ranged .fi'om 180-395 kglha depending upon stocking density and size of fingerlings. In treatments fish yield increased with stocking density. Highest fish yield occurred in treatment with combination of large size (LS: 20g) and highest stocking (HS: 6000 Nos) density.