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fish output
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  鱼产量
     feeder fishes were raised in net pen from water surface down to 2.5m, a forecasting technique for reasonable use of the Azolla feeding fishes was developed, fish output was increased by 37.5—117.6%;
     在水下2.5m深处,开展网箱养吃食性鱼,可提高饲料效价,增加鱼产量37.5—117.6%;
短句来源
     There are 149 and a quarter hectares of pounds at the side of the Ehai Lake. The volume of the organic contents and the water changed increase in direct ratio to the growth of the fish output. Every year,6 716 million square meters of water is discharged into the Ehai Lake,in which N,P and COD are respectively 33 2 tons,3 83 tons and 420 4 tons.
     洱海湖滨区有鱼塘 1 49 2 5公顷 ,其有机物含量及换水量均与鱼产量成正比 ,每年向洱海排换水 671 6万米3,输出N、P和COD分别为 33 2T、 3 83T和 4 2 0 4T。
短句来源
     The fish output increases with the increasement of putting frys number.
     鱼产量随尾数的增加而增加 ,而以每 6 6 7m2 投鱼尾数 80 0尾效果最佳。
短句来源
     This test mainly studied on the techniques of pond breading in which the doninating fish was Aristichys nobiiis in Panxi Region. The result schowed that under this breeding pattern,if we intensify bait casting as well as fertilization and at the same time,insist on "San Kan"and "Wu Ding"and strengthen on controlling water quality,the net output of Aristichys nobiiis can reach 733.7kg/666.7m2 and with a total fish output of 1661kg/666.7 m2 and then highten the yield of fish and economic benefit.
     本文主要探讨了在四川攀西地区进行以鳙鱼为主养鱼的池塘精养技术,结果表明:以鳙鱼为主的养殖模式,加强投饵结合施肥进行精养,同时坚持“三看”、“五定”投饵技术和加强水质控制等,可使鳙鱼的净产量达到733.7kg/666.7m2,全池鱼的总净产量达到1661kg/666.7m2,从而大幅度提高鱼产量和经济效益。
短句来源
  “fish output”译为未确定词的双语例句
     ③Fish output up-gotten by water level controlling and increasing via running water.
     ③按照生物种群的生态型对水层敏感性实施田间水位和流水增氧调控,提高养鱼产量;
短句来源
     A model of raising fish、duck and vegetable in rice fields was carried out based on the biological principle. The results showed that the rice yield raised 750 kg/hm 2,fresh fish output was 750 kg/hm 2,vegetable yield reached 1 650 kg/hm 2 and 225 adult ducks per hectare in the exprimental field.
     1998~ 1999年在贵州省石阡县进行了稻、鱼、鸭、菜复合生态模式示范 ,示范面积 12hm2 ,获得了平均产鲜鱼 75 0kg/hm2 、瓜果 16 5 0kg/hm2 、成鸭 2 2 5只 /hm2 ,增产水稻 75 0kg/hm2 的良好效益。
短句来源
     According to nature bait resources and fisheries construction in Nushan Lake. Fisheries construction had been rectified by measures of man's transport, natural multiplication and transplanting economic creature. Through the supplement of net cultivation, fish output was increased from 30.4kg per acre in 1994 to 35.6kg per acre in 1999. Economic benefit was notability.
     根据女山湖天然饵料资源及鱼类组成结构状况 ,通过人工放流、自然增殖补充鱼类 ,移殖水生经济动物 ,逐渐调整鱼类结构组成 ,使湖内天然饵料资源得以合理充分利用 ,辅以围拦网人工养殖 ,水产品产量由 1994年的 45 6kg/hm2 提高到 1999年的 5 3 4kg/hm2 ,经济效益较为显著
短句来源
     The objectives of this study are demonstration of agri-ecological engineering project, and studying the relation of energy flow between aquaculture and plant hydroponics. The results of Qingpu of Shanghai indicate: ①The fish output of red tilapia (Tilapia mossambica (♀)×Tilapia nilotica (♂)) and obscure puffer (Fugu obscurus) is 58 kg·m~(-3), 12.28 kg·m~(-3) respectively, during culturing, concentation of ammonia-N, nitrite-N is respectively <1.5 mg·L~(-1) and <0.8 mg·L~(-1), DO>5.0 mg·L~(-1);
     在上海市青浦区的实践表明:①单位水体红罗非鱼(Tilapiamossambica(♀)×Tilapianilotica(♂))和暗纹东方(Fuguobscurus)的产量分别达到58kg·m-3和12.28kg·m-3,养殖期间,氨氮浓度<1.5mg·L-1,亚硝氮浓度<0.8mg·L-1,DO>5.0mg·L-1;
短句来源
     To install the lamps on paddy field for fishery can trap and kill many kinds of insect pest of rice. The fish output for one lamp is 30.99kg per Mu and average yield of rice for one season is 489.39kg per Mu,40.78kg higher than non-lamp plots.
     在稻田养鱼示范点安装杀虫灯,对水稻二化螟、稻纵卷叶螟、稻飞虱、大螟、叶蝉、稻螟蛉等多种害虫具有一定的诱杀效果,平均每盏灯诱虫养鱼折合亩产30.99kg。
短句来源
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  fish output
The fixed solar energy (estimated as primary production) and the direct and indirect auxiliary energy requirements per unit of fish output were expressed in similar units.
      
To get a potential fish output of the ecosystem, a tentative estimation of fishery capacity of Lake Chenhu was made by using the index of food quotients and relevant conversion factors.
      
Even as late as the early 1970s, only about 1% of the total fish output of the country was farmed.
      
Current feed conversion efficiencies can be measured in wet weight equivalents or the amount of wild fish input to farmed fish output.
      


Studies were carried out in highly intensive fish ponds with main cultivated fishes in three combinations: silver carp, bighead and Tilapia; black carp and grass carp; and black carp solely. Diel, vertical, horizontal and seasonal changes of dissolved oxygen were determined in those ponds. It shows that the amount of dissolved oxygen in pond water is chiefly affected by photosynthesis (P) and respiration (R) of aquatic organisms and the photosynthesis of phytoplankton plays the most importantrole in oxygen dynamics....

Studies were carried out in highly intensive fish ponds with main cultivated fishes in three combinations: silver carp, bighead and Tilapia; black carp and grass carp; and black carp solely. Diel, vertical, horizontal and seasonal changes of dissolved oxygen were determined in those ponds. It shows that the amount of dissolved oxygen in pond water is chiefly affected by photosynthesis (P) and respiration (R) of aquatic organisms and the photosynthesis of phytoplankton plays the most importantrole in oxygen dynamics. In less cloudy and sunny days, the addition of dissolved oxygen are 86.0 and 95.3% from photosynthesis of phytoplankton, 14.0 and 4.7% from atmosphoric diffusion, respectively; while the consumption of oxygen are 72.0 and 72.6% thorugh "water" respiration, 22.0 and 13.1% through fish, 2.9 and 5.5% through mud, 3.1 and 8.8% due to escaping, respectively, in growing season. According to the analysis of the role of diffusion in the dissolved O_2 dynamics in pond water, it is considered that a pond with squarish or slightly rectangular shape, having a water depth of 2.5 meters and an area of 1 hectare (or 1.5 ha), is more suitable for creating high fish output (15000 kg/ha), because a sufficiently large water surface enables the wind working better for water circulation and reaeration so as to maintain the dissolved .oxygen content of about 1.5—2mg/L at the bottom. Studies were also conducted on the relationships between environmental control and fish stocking structure control in the management of fish pond such as dissolved oxygen distribution in relation to fish feeding, the technique of dissolved oxygen forecast, The critical standing capacity (CSC) of fish. The results show that grass carp feeds normally when dissolved oxygen is at a level of 3 mg/L, black carp begins to feed when dissolved oxygen is at 2 mg/L. The dissolved oxygen value when fish begins to breathe at water surface is lower than 1mg/L for Tilapia, 0.8mg/L for Carassius cuvieri, silver carp and bighead, lower than 0.8mg/L for grass carp and Megalobrama amblycephala, lower than 0.7mg/L for black carp, common carp and Carassius auratus; and a large number of fish die if dissolved oxygen is lower than 0.6mg/L. Based on these results, it seems justified that the suitable value of dissolved O_2 is 4mg/L, the security value is 3mg/L, the warning value is 1.5mg/L and the critical value is 1mg/L in an integrated fish pond. In order to ensure normal feeding and growth of fish, the average dissolved oxygen value of water column in July, August and September should be over 2mg/L. The. CSC value should be 6000kg/h in ponds cultured mainly with silver carp, bighed carp and Tilapia, and 11250 kg/ha in ponds cultured mainly with black carp.

根据1979—1984年对主养鲢、鳙、非鲫,主养青、草鱼,主养青鱼3种养殖结构类型高产鱼池溶氧变化周期的系统研究,揭示了高产养鱼池塘溶氧的昼夜、垂直、水平变化及季节变化周期,分析了光合作用、呼吸作用、扩散作用在高产养鱼池塘溶氧动力学上的地位和作用。对高产养鱼池塘的溶氧收入、支出及平衡情况进行了定量研究,在主要饲养季节,测得晴到多云天、晴天的溶氧来源分别为:浮游植物光合产氧占86.0和95.3%,大气扩散溶入占14.0和4.7%;氧的消耗分别为:“水呼吸”消耗氧占72.0和72.0%,鱼类呼吸消耗氧占22.0和13.1%,淤泥中生物呼吸消耗氧占2.9、5.5%,扩散逸出占3.1、8.8%。文中还对溶氧变化周期与养鱼池塘管理的环境控制、结构控制之间的关系进行了分析。

This paper deals with regulating priciples of high-yield fisheulture in the rice-wheat rotation in paddy field and its relative technique estabilished as following:①Ecological capacity expanded and mained by use of“Narrow furrow and deep ditch”.②Fish farm time prolonged and population density of bioeommunity and niche breadth regulated by the structure of wheat on furrow and fish within-ditch,and rice-fish mul- tual.③Fish output up-gotten by water level controlling and increasing via...

This paper deals with regulating priciples of high-yield fisheulture in the rice-wheat rotation in paddy field and its relative technique estabilished as following:①Ecological capacity expanded and mained by use of“Narrow furrow and deep ditch”.②Fish farm time prolonged and population density of bioeommunity and niche breadth regulated by the structure of wheat on furrow and fish within-ditch,and rice-fish mul- tual.③Fish output up-gotten by water level controlling and increasing via running water.④Multual system- aries stabilized by inputting man power,matter,money and energy ere,especially bioenergy.

本文研究了稻麦两熟养鱼高产的调控原理,提出了稻麦连作,畦麦沟鱼、稻鱼共生的稻田全年养鱼技术。①利用深沟窄畦扩容和稳容,改造生境容量;②采用畦麦沟鱼、稻鱼共生结构调节群落的种群密度和生态位宽度,延长养鱼时间;③按照生物种群的生态型对水层敏感性实施田间水位和流水增氧调控,提高养鱼产量;④提高稻麦两熟养鱼的生产率,合理投入,以生物质能为主源输入稳定系统结构。

Through the cultivation experiments on Tilapia Nilotica and Carp in net tanks, we studied the conditions, ways and main technological measures for fish cultivation and summed up some practical experiences on high-yield fish culture in net tanks. It can be used as a reference for improving the fish output and large-scale fish culture.

通过网箱养殖尼罗罗非鱼、鲤鱼的试验,总结了高产网箱养鱼的条件、方法及主要技术措施等实跨经验,分析了试验取得的成果,为今后的规模生产及如何提高网箱养鱼的产量提供了科学依据。

 
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