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pond management
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  “pond management”译为未确定词的双语例句
     3S-Based pond management and spatial analysis of ponds using catch-store coefficient were explored.
     对用3S技术来管理塘堰,结合拦蓄系数对塘堰供水量进行量化等问题进行探讨;
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     Systematic studies were carried out on releasing density,feed composition, DO, salinityand growth law of Perch in 1993~1994.Some experiments of relative technique on all over the Periodfrom POnd management of culture to harvest were also conducted.
     1993~1994年对鲈养殖的密度、饵料、溶氧、盐度及生长规律等进行了较系统研究,对池塘养殖管理直到收获全过程的相关技术进行了试验。
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  相似匹配句对
     In its management, the C.
     人事管理中,实行严格录用、待遇丰厚、赏罚分明等,并采取年功序列制。
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     Management
     管理原理五则
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     Some Experiences of Running Management of Qiqihar Oxidation Pond
     齐齐哈尔氧化塘运行管理的几点体会
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     On the Goden Pond
     金色池塘(七)
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     On the Golden Pond
     金色池塘(一)
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  pond management
The results were discussed and related, above all, to the ecological properties of the constituent species as well as to pond management.
      
To achieve optimal HRAP productivities under fluctuating climatological conditions, we propose a pond management strategy based on model simulations.
      
crucian carp Carassius carassius L.), but pond management plans rarely include considerations of native fishes.
      
Using glyphosate as part of the pond management programme proved cost effective and had no deleterious effect on the carp fry or their food organisms.
      
Countermeasures for sustainable pond management include improving feeds and feeding, sediment treatments, machine aerating, chemicals with no pollution, and integrated fish-shrimp cultivation.
      
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In Hunan,the age of sex maturity of Mylopharyngodon piceus which grows inthe environment of a pond is 5—6 years;the male spawners ripen one year earlierthan the female ones generally.Oocytes and follicular cells are of the same origin,both derived from the oogonia.The oocytes of the pond-cultured Mylopharyngodonpiceus can only develop to the period of primary oocytes (phase Ⅳ),hence it isvery necessary to induce maturation division artificially so that meiosis can takeplace and the oocytes can develop from phase...

In Hunan,the age of sex maturity of Mylopharyngodon piceus which grows inthe environment of a pond is 5—6 years;the male spawners ripen one year earlierthan the female ones generally.Oocytes and follicular cells are of the same origin,both derived from the oogonia.The oocytes of the pond-cultured Mylopharyngodonpiceus can only develop to the period of primary oocytes (phase Ⅳ),hence it isvery necessary to induce maturation division artificially so that meiosis can takeplace and the oocytes can develop from phase Ⅳ to phase Ⅴ.The entire course ofspermatogenesis,from spermatogonium to spermatozoon,can be completed endo-genously in the pond environment.The testes develop to stage Ⅳ in the fifth winterof the first sex cycle;the ovaries develop to stage Ⅲ in the sixth winter of thefirst sex cycle.After this,the testes remain in stage Ⅳ and the ovaries remain instage Ⅲ throughout the winter of every year.The law governing such seasonal chan-ges in the gonads provides a theoretical basis for the selection of the spawners infish-culture.The oocytes develop from phase Ⅲ to phase Ⅳ synchronously.Thehistological structure of the ovaries returns to stage Ⅱ after induced spawning orafter natural degeneration,which testifies that female Mylopharyngodon piceus isthe type of fish that spawns only once a year.According to our research,two different types of yolk are formed in the oocytesof this fish at the age of sex maturity.One type of yolk is intravesicular,whileanother type is extravesicular.If pond management,such as feeding and water-qua-lity regulation,is not appropriate and yolk formation becomes aberrant,then thephenomenon of abortive eggs is bound to occur.This is an important problem infish-culture,the solution of which depends on further researches.

湖南地区生长于池塘环境的青鱼,性成熟年龄是5—6年,雄性比雌性普遍地早熟一年。卵母细胞和滤泡细胞是同源的,都来自于卵原细胞。池养青鱼的卵母细胞只能发育到初级卵母细胞阶段(Ⅳ时相),必须通过人工催情,才能进行染色体的减数分裂,使卵母细胞由第Ⅳ时相发育到第Ⅴ时相。精细胞的发生,能够完成由精原细胞到精子的全部发育过程。青鱼在第一次性周期内,雄性精巢在第5个冬季进入第Ⅳ期,雌性卵巢在第6个冬季进入第Ⅲ期,从此以后,每年冬季,雄性精巢回复到第Ⅳ期,雌性卵巢回复到第Ⅲ期,这种性腺季节周期变化的规律,为生产上选留亲鱼提供了理论依据。青鱼雌性卵母细胞由第Ⅲ时相到第Ⅳ时相是同步性的;经人工催情产卵或自然退化后,卵巢的组织学结构又回复到第Ⅱ期,证明青鱼是一次产卵类型。已经达到性成熟年龄的雌性青鱼,卵母细胞的卵黄形成有两种不同的类型。第一种类型是泡内卵黄,第二种类型是泡外卵黄。如果饲养管理工作如投饵、水质调节不适宜,卵母细胞不能正常形成卵黄,就会出现卵子的败育现象,这是生产上一个重要问题,必须进一步研究。

Systematic studies were carried out on releasing density,feed composition, DO, salinityand growth law of Perch in 1993~1994.Some experiments of relative technique on all over the Periodfrom POnd management of culture to harvest were also conducted. The results showed the survival rateof finished culture was above 90%;the two years' Per mu yield was 264. 75kg on average with individual average weight of 228.5g;the Per mu net profit achieved 3278.5 yuan. The experimentalachievement,appraised by experts in...

Systematic studies were carried out on releasing density,feed composition, DO, salinityand growth law of Perch in 1993~1994.Some experiments of relative technique on all over the Periodfrom POnd management of culture to harvest were also conducted. The results showed the survival rateof finished culture was above 90%;the two years' Per mu yield was 264. 75kg on average with individual average weight of 228.5g;the Per mu net profit achieved 3278.5 yuan. The experimentalachievement,appraised by experts in Jan.1995,met the advanced level at home and the very year'soutput of Perch culture as well as the biological study for pond culture was in the lead in our country.

1993~1994年对鲈养殖的密度、饵料、溶氧、盐度及生长规律等进行了较系统研究,对池塘养殖管理直到收获全过程的相关技术进行了试验。结果:养成成活率90%以上,两年平均,体重228.5g,亩产264.75kg,亩纯利3278.5元。1995年1月专家鉴定认为,本成果居国内先进水平,其中鲈的当年养殖产量、密度及池塘养殖生物学研究属国内领先水平。

 
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