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首页> 外文期刊>Bangladesh journal of fisheries research >On farm trial of Bangladesh Fisheries Research Institute (BFRI) evolved two aquaculture technologies
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On farm trial of Bangladesh Fisheries Research Institute (BFRI) evolved two aquaculture technologies

机译：在孟加拉国渔业研究所（BFRI）的农场试验中，开发了两种水产养殖技术

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Two BFRI evolved aquaculture technologies - integrated rice fish farming and carp polyculture with over-wintered fingerlings under different stocking densities were tested during 2003-04. The study was coordinated with two local NGOs namley NICHAITA and JNDP, Muktagacha, Mymensingh. Integrated rice fish farming technology was demonstrated in 9 plots each having an area between 60-100 dec. during boro season. Fifteen days after transplantation of rice seedlings, fingerlings of rajpunti (Barbodes gonionotus) of 7-10 g of individual weight were stocked in the rice fields at the density of 3,000 (T_1), 3,750 (T_2) and 4,500/ha (T_3). The corresponding final weight offish after three and half months in treatments 1, 2 and 3 were 110± 14.21, 101 ±16.55and 86±22.28 g, respectively. The mean weight of fish in treatments 1 and 2 was significantly higher than treatment 3. Fish production obtained from treatments 1, 2 and 3 were 218.16±18.29, 239.70±25.11 and 236±24.66 kg/ha, respectively. On-farm demonstrations of carp polyculture using over-wintered fingerlings rohu (25-28 g), catla (24-26 g), mrigal (21-26 g) and grass carp (20-24 g) under different stocking densities were undertaken in nine earthen ponds (1,200-1,600 m2) for a period of six monthsat three different stocking densities. The stocking densities of treatment 1 (T_1), treatment 2 (T_2) and treatment 3 (T_3) were 2,000, 3,000 and 4,000/ha, respectively. Fish were fed with rice bran and mustard oil cake (3:1). Soft green grass and banana leaves were provided mainly for grass carp. At harvest, the production obtained in treatments 1, 2 and 3 were 2,325±74.75, 2,620±49.66 and 2,982±171.52 kg/ha, respectively. The results demonstrated higher growth of fish in treatment 1 than those oftreatments 2 and 3. However, treatment 3 contributed relatively higher production than those of treatments 1 and 2, whereas, highest net benefit was received from treatment 2.
机译：在2003-04年间，对两种BFRI进化的水产养殖技术进行了测试-综合稻田养鱼和鲤鱼混养以及不同放养密度下的越冬鱼种。这项研究是与两个当地的非政府组织namley NICHAITA和JNDP（位于Mymensingh的Muktagacha）进行协调的。在9个样地中展示了稻米综合养殖技术，每个样地面积在60-100 dec之间。在boro季节。水稻秧苗移栽后十五天，以3,000（T_1），3,750（T_2）和4,500 / ha（T_3）的密度在稻田中放养了7-10 g单重的幼鱼（Barbodes gonionotus）的鱼种。在处理1、2和3的三个半月后，相应的最终鱼重分别为110±14.21 g，101±16.55和86±22.28 g。在处理1和2中，鱼的平均体重明显高于处理3。从处理1、2和3获得的鱼产量分别为218.16±18.29、239.70±25.11和236±24.66 kg / ha。进行了场内养殖鲤鱼混养的示范，它们使用了不同放养密度的越冬鱼种rohu（25-28 g），catla（24-26 g），mrigal（21-26 g）和草鱼（20-24 g）在三个不同的放养密度下，在九个土池（1,200-1,600平方米）中进行六个月的测试。处理1（T_1），处理2（T_2）和处理3（T_3）的放养密度分别为2,000 / 3,000 / 4,000 / ha。用米糠和芥末油饼（3：1）喂鱼。主要为草鱼提供了柔软的绿草和香蕉叶。收获时，在处理1、2和3中获得的产量分别为2,325±74.75、2,620±49.66和2,982±171.52 kg / ha。结果表明，处理1的鱼类比处理2和3的鱼类生长更高。但是，处理3的产量比处理1和2的相对高，而处理2的净收益最高。

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