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growth and fecundity     
相关语句
  生长繁殖
     Observation of NIH Mice Growth and Fecundity
     NIH小鼠生长繁殖性能的观察
短句来源
     Objective To observe the growth and fecundity of C57BL/KsJ(+/db) mice under a stable raising condition and blood biochenicals of db/db and +/db mice were examined.
     目的在相对稳定的饲养环境下,观察C57BL/KsJ杂合仔(+/db)小鼠的生长繁殖能力,同时对纯合仔(db/db)、杂合仔(+/db)小鼠进行部分生化指标的测定。
短句来源
     Objective To observe the growth and fecundity of NIH mice under a stable raising condition.
     目的 在稳定的饲养环境条件下 ,观察NIH小鼠生长繁殖能力。
短句来源
  生长和生殖力
     AGE,GROWTH AND FECUNDITY OF THE MUDSKIPPER BOLEOPHTHALMUS PECTINIROSTRIS
     大弹涂鱼的年龄、生长和生殖力研究
短句来源
     Age, growth and fecundity of Clupanodon punctatus in Xipu Bay of Dongshan Island,Fujian Province.
     福建东山岛西埔湾港养斑鲦的年龄、生长和生殖力研究
短句来源
  生长和繁殖力
     We study the growth and fecundity of Siniperca chuatsi and Siniperca kneri.
     研究了鳜及大眼鳜(Siniperca kneri)的生长和繁殖力等生物学特征。
短句来源
     Studies on the Growth and Fecundity of Rhinogobio Typus Bleeker in Jialingjiang River.
     嘉陵江吻(鱼句)生长和繁殖力研究
短句来源
     THE GROWTH AND FECUNDITY OF SINIPERCA CHUATSI AND SINIPERCA KNERI
     鳜鱼和大眼鳜鱼年龄生长和繁殖力的比较研究
短句来源
  生长繁殖性能
     Observation of NIH Mice Growth and Fecundity
     NIH小鼠生长繁殖性能的观察
短句来源

 

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      growth and fecundity
    Field data concerning mortality, growth and fecundity of adult plants were collected yearly in three wild populations for 7-9?years.
          
    Growth and fecundity generally increased with increasing crownillumination.
          
    Aster pilosus did not exhibit a clear pattern of increased growth and fecundity in a specific soil type or pulse treatment.
          
    decurrens grown in sandy loam, the predominant soil type of the Illinois River Valley, had thegreatest increase in growth and fecundity in response to nutrient pulsing.
          
    Survival, growth and fecundity of the three populations were controlled more by transplant site characteristics than by genetic differences, i.e.
          
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    Four-year experiments have proved that good cultivars of peach grafted on the prunus lomentosa for pot culture and repeatedly pinched off the stem top show the merits of dwarf trunk, more flower buds and faster growup, and blossom and fructify in the second year. For their growth and fecundity, Baifeng is the best of all the three cultivars used in the experiments.

    经过4年试验证明,优良品种桃嫁接在毛樱桃上盆栽,并进行多次摘心,表现了树体小,成形快,花芽多,第2年即开花结果。已显示一定的观赏和生产价值。 桃是我国重要水果之一,不仅味美汁多,营养丰富,而且桃花可美化环境,深受广大人民喜爱。但在我国北方寒地直立栽培越冬困难,盆栽的寿星桃又多用种子播种,一般结果小,品质差,繁殖慢。针对这种情况,我们将优良品种桃嫁接在毛樱桃上盆栽,探索盆栽的适宜品种和栽培技术措施,以期提高盆栽效果。现将试验结果报告如下。

    Agrocybe aegerita strains from different countries and areas were collected. The effect of carbon nitrogen ratio, pH and temperature on mycelial growth and fecundity of A. aegerita. strains was compared. Meanwhile the isozyme tests were applied to analyze the relationship of various strains. The results indicated that the optimal culture conditions were not all the same for A. aegerita strains selected from different sources. Normally, the C/N and pH range suitable for mycelial growth and fruitbody...

    Agrocybe aegerita strains from different countries and areas were collected. The effect of carbon nitrogen ratio, pH and temperature on mycelial growth and fecundity of A. aegerita. strains was compared. Meanwhile the isozyme tests were applied to analyze the relationship of various strains. The results indicated that the optimal culture conditions were not all the same for A. aegerita strains selected from different sources. Normally, the C/N and pH range suitable for mycelial growth and fruitbody formation were 10:1 - 80:1 and pH4 - 12 resp. , while the optimum C/N and temperature for mycelial growth were 10:1 and 25℃ resp. and optimum pH and temperature for fruitbody formation were pH 6 and 20-25℃ resp. . According to the results of isozyme tests, the per-oxidase isozyme activity of the mycelia was low and the isozyme bands were dull. So, peroxidase isozyme could not be used as biochemical mark for examining genetic diversity. Neverthless, the esterase isozyme activity of mycelia was higher and the isozyme bands were more abundant, so it could be applied to analyze the relationship of different A. aegerita strains.

    以不同来源的柱状田头菇(Agrocybe aegerita)为研究对象,就不同的碳氮比、pH值以及培养温度对菌丝生长速度和结实性的影响进行了比较研究,并从同工酶角度分析比较了各菌株的亲缘关系。研究结果表明,不同来源的柱状田头菇所要求的最佳培养条件不尽相同。一般情况下,菌丝在碳氮比为10:1~80:1时均可生长,碳氮比为10:1时,菌丝生长最快,且易结实;柱状田头菇可生长并结实的pH值为4~12,最适宜结实的pH值为6;25℃时柱状田头菇菌丝生长速度最快,而20~25℃比较适合其结实。同工酶分析表明,柱状田头菇菌丝中过氧化物同工酶活性不高,酶带单调,不适宜用做检测遗传多样性的生化标记;酯酶同工酶有一定的活性,可以从相似系数上分析不同菌株的亲缘关系。

    Mud crab Scylla serrata farming has been going on for at least three decades in south China, especially in recent decade, but it has not reached even its optimum potential. The major constraint for further expansion of mud crab culture is the limited supply of crab ‘seed'. Mud crab culture still depends on wild-caught crablets, but its quantities are not sufficient to meet demand even at the current size of mud crab culture farming. There is a great need to develop a hatchery technology for the mass production...

    Mud crab Scylla serrata farming has been going on for at least three decades in south China, especially in recent decade, but it has not reached even its optimum potential. The major constraint for further expansion of mud crab culture is the limited supply of crab ‘seed'. Mud crab culture still depends on wild-caught crablets, but its quantities are not sufficient to meet demand even at the current size of mud crab culture farming. There is a great need to develop a hatchery technology for the mass production of seed to meet the demands of mud crab farming. Mud crab culture research, particularly larval rearing, has been conducted at Department of Oceanography, Xiamen University over ten years. It has been obvious that production of eggs and newly hatched larvae is not an issue affecting the hatchery success of mud crab. Mature female broodstock and its cultivation is one key of successful larval rearing. Quality of newly hatched larvae or their inherent viability is regarded as a main issue influencing the success of hatchery production. The nutrition for broodstock was shown a considerable effect on gonad growth and fecundity, hatching and larval quality. But little is known of ecological factors such as temperature, light, salinity, bottom substrates, etc. that influence larval quality. If readily measured criteria could be used to predict the subsequent performance of larvae, it would improve the consistency of production and reduce the resources expended on larvae of inadequate viability. The objective of this investigation is, firstly, to determine the effect of brooding temperature on dry weight and energy of newly-hatched zoea-1 of Scylla serrata, and on larval survival and development, and secondly to formulate a criteria that can be used as a judgement of newly hatched larval quality. Dry weight and energy content of newly hatched larvae of 17 broods which come from the different seasons and culturing at the different brooding temperature were measured. The embryonic development, larval production and larval development (under normal rearing conditions) from the different batches were observed. Mature female were collected from coastal water or shrimp pond. The broodstock tank (6.5×4×2 m 3) is with sand-covered bottom and flow through seawater. The tank is maintained under low light conditions and temperature is 25℃ to 32℃, salinity ranges between 25×10 -12 and 32×10 -12. The stocking density is 2~3 crabs/m 2. The broodstock are fed twice one day, in evening and in morning. The diet is consisted of crustaceans, molluscs and fish. Following ovulation the crabs were removed from broodstock tank and maintained individually in 1000 dm 3 tanks with fresh seawater and no diet. After hatching, larvae are collected for dry weight and energy content measurement and estimates of unhatched eggs, prezoea, dead zoea are made. The live zoea is transferred to rearing tank and the stocking densities of the larvae are about 200/dm 3. Seawater is settled, filtered, and formed green water by adding unicell algae (<10 4 cells/cm 3).The tank is maintained under low light conditions at zoeal stage and temperature is 25℃ to 32℃. Salinity ranges between 25×10 -12 and 32×10 -12. Zoea-1 to Zoea-2 is fed with rotifers (Brachionus plicatilis), Zoea-3 and following stage larvae is fed with Artemia nauplii. Nutritive value, especially for highly unsaturated fatty acid (HUFA) of rotifers and Artemia nauplii could be elevated through nutritional enrichment. The embryonic development of mud crab is expedited with brooding temperature rising, embryonic developmental time is short under high brooding temperature. And there are no specific relations between dry weight (DW), or energy content (EC,J/mg) of newly-hatched zoea-1 and brooding temperature. But effects of the daily difference in temperature during embryonic development on dry weight, energy (E, J/ind) of newly-hatched zoea-1 are obviously, and larval survival and development are affected subsequently. When the daily difference in brooding temperatu

    研究了锯缘青蟹抱卵蟹培育和胚胎发育及孵化温度对刚孵化第 1期状幼体 ( Z1)干重 ( DW)和比能值 ( EC,J/mg)以及对幼体发育和存活的影响 .研究结果表明 :胚胎发育随孵育温度的升高而加快 ,但孵育温度与刚孵化幼体的干重和能量 ( E,J/ind)没有明确的相关性 ;而抱卵蟹培育和胚胎发育期间孵育温度的日温差对刚孵化青蟹幼体的干重和能量有明显的影响 ,并对幼体的存活和进一步发育产生影响。当孵育温度日温差≥ 2℃时 ,胚胎发育不整齐 ,孵化不同步 ,死卵或孵出原状幼体的比例高 ;孵化出的第 1期状幼体一般都无法蜕皮进入第 2期。孵育温度日温差与刚孵化幼体的干重或能量的相关性不确定 ,但当孵育温度日温差≥ 2℃时 ,刚孵化的状幼体的个体干重和能量的乘积 ( DW× E) <0 .74 6的几率显著增加 ,幼体可养活的几率极小 ,( DW× E)可作为判断刚孵化的第 1期状幼体能否正常生长发育的指标

     
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