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鱼粪
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  fish feces
     STUDY ON THE DIGESTION AND UTILIZATION OF FISH FECES BY SILVER CARP AND BIGHEAD FINGERLINGS
     鲢鳙对鱼粪消化利用的研究
短句来源
     The Determination of Chromium in Fish Feces by Flame Atomic Absorption Spectrometry
     火焰原子吸收法测定鱼粪中的Cr
短句来源
     Eighty-nine samples of fish feces taken from rice field and 10 fishes were examined for breathing sy-phons of mosquito larvae. Breathing syphons were found in 22 fecal samples (24.7% posi-live) and 3 fishes (30% positive).
     抽样解剖10条鱼的30%和89份鱼粪中有24.7%检出蚊幼的呼吸管(孔)。
短句来源
  fish excrement
     in water filter feeder fishes were cultured and fed by the fish excrement from the net pen, thereby, the filter feeder fishes's yield was increased to 4.29 times;
     在水中,放养滤食性鱼,利用网箱的鱼粪排出为饵料,水中鱼类增产4.29倍;
短句来源
  “鱼粪”译为未确定词的双语例句
     (3) fecal pellet.
     ( 3)鱼粪
短句来源
     (1) Feeding feces for 10 days, the body weight of the experimental silver carp and bighead increased by 6.25± 3.46% and 7.80±3.18%, respectively.
     研究结果是:(1)鲢、鳙对鱼粪中干物质消化率分别为58.54±9.53%及68.57±8.98%。
短句来源
     Main operatig conditions were optimized A rapid, accuracy method for the determination of Cr was established. Some real samples were analysed and satisfactory results were obtained. The recovery of this method is 90%- 99. 5% and the relative standard deviation is 0.82% -1. 89K%
     研究了火焰原子吸收法测定鱼粪中Cr的作品溶解方法,优化了仪器的主要操作参数,建立了快速、准确测定鱼粪中Cr的分析方法.该方法用于实际佯品的测定,获得了令人满意的结果.方法的回收率为90%-99.5%,变异系数为0.82%-1.89%.
短句来源
     When putting norm over 400 frys per 667m 2, the organic fertilizer produced by fish can have significant effect on rice yield.
     投鱼尾数至少在 4 0 0尾 / 6 6 7m2 水平以上 ,使鱼粪有机肥对水稻产生影响。
短句来源
     Different feed had no significant effects on special growth rate of ricefield eels(P>0.05) while great influence on feed coefficient,material and energy transforming efficiency and feces retrieve rate(P<0.01).
     不同饲料饲养的黄粉虫幼虫对黄鳝特定生长率没有影响(P>0.05),但对饵料系数、物质能量转化效率及鱼粪回收率有极显著的影响(P<0.01)。
短句来源
  相似匹配句对
     (3) fecal pellet.
     ( 3)
短句来源
     fish
    
短句来源
     STUDY ON THE DIGESTION AND UTILIZATION OF FISH FECES BY SILVER CARP AND BIGHEAD FINGERLINGS
     鲢鳙对消化利用的研究
短句来源
     MINERAL SPRING FISH
     矿泉
短句来源
     Dung Bettle Ecology
     《金龟生态学》
短句来源
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  fish feces
The effects of phytophagous fishes on phytoplankton primary productivity in a freshwater pond, the importance of recycling of algae in fish feces, and the species specific interaction with phytoplanktons were studied.
      
Organic and caloric levels of fish feces relative to its consumption by coprophagous reef fishes
      
There was also a significant association between the presence of trapped animals and fish feces at Santa Catalina Island (p = 0.009); this association was not quite as strong in St.
      
  fish excrement
Sea sludge, which is sediment of fish excrement and sewage on the sea bottom, continues to be a serious environmental problem.
      


In the rice-azolla-fish cropping system as we tested after azolla had been eaten by fish, the effect of fish's excreta for rice growth and nitrogen uptake were studied with 15N isotope labelled method. Results of experiment in the paddy fields showed that azolla was a good fodder to fish (T,nilotica ). Its weight increased 41.2-48.03% during early rice season, there azolla(60 kg/ha) was put into rice-azolla-fish system as the fish's fodder.After that, the excreta also fertilized the paddy soil and had a good...

In the rice-azolla-fish cropping system as we tested after azolla had been eaten by fish, the effect of fish's excreta for rice growth and nitrogen uptake were studied with 15N isotope labelled method. Results of experiment in the paddy fields showed that azolla was a good fodder to fish (T,nilotica ). Its weight increased 41.2-48.03% during early rice season, there azolla(60 kg/ha) was put into rice-azolla-fish system as the fish's fodder.After that, the excreta also fertilized the paddy soil and had a good effect to rice growth so the rice yield increased 9.7-20.7% than that of check (without application of N-fertilizer ), but azolla (60kg/ha) was incorporated as green manure in paddy soil the rice yield only increased 4.4-14.8% as compared with check. we found azolla-N could be utilized for several times in rice-azolla-fish. First the nitrogen content of fish reached 2.41% and 15N excess was changed from 0.366% to 0.4313%. So the protein of plant was changed into animal protein effectively during early rice seaeon. Second, the rates of !5N recoveried by fish and rice were 38.24% and 29.52% respectively, there fore the total rate of 15N utilized was 67.76% in the 15N isotope labelled azolla as fish fodder and that was higher than the average rate of N utilized in azolla incorporated as green manure. The later was 48.83%.

应用~(15)N同位素示踪技术,研究了红萍氮素被鱼体摄食后,再以排泄物肥田,对水稻生长以及氮素吸收情况。试验结果表明,红萍作饵料对尼罗罗非鱼生长有良好效果。在稻萍鱼体系中,经2个早季稻田放养表明,每季鱼体可增重41.2~48.0%。投施红萍作饵料,以萍喂鱼,鱼体排泄物肥田,对水稻生长有益。稻谷产量比不施氮肥的对照区高9.7~20.7%,而直接压施等氮量红萍作肥料处理,则高于对照区4.4~14.8%。在稻萍鱼体系中,萍体氮素可多次利用,~(15)N标记红萍作饵料喂养尼罗罗非鱼后,鱼体含氮量可达2.41%,其~(15)N丰度值可从0.366%提高到0.4313%,能有效的将植物蛋白转化为动物蛋白,鱼体的~(15)N利用率为38.24%,而水稻对鱼粪中~(15)N利用率为29.52%,其~(15)N总利用率可达67.76%。而直接压施红萍作肥料其~(15)N利用率为48.83%。

The feces of fishes was used to represent natural organic detritus and to feed the fingerlings of silver carp and bighead. The digestion and utilization of feces by both fishes were determined, from which the nutritional significance of natural organic detritus for both fishes was evaluated. In laboratory, fish feces egested by silver carp and bighead fed with Microcystis was collected as food for the fingerlings and its digestibility was determined. The growth of both fishes was also measured. The results are...

The feces of fishes was used to represent natural organic detritus and to feed the fingerlings of silver carp and bighead. The digestion and utilization of feces by both fishes were determined, from which the nutritional significance of natural organic detritus for both fishes was evaluated. In laboratory, fish feces egested by silver carp and bighead fed with Microcystis was collected as food for the fingerlings and its digestibility was determined. The growth of both fishes was also measured. The results are as follows. (1) Feeding feces for 10 days, the body weight of the experimental silver carp and bighead increased by 6.25± 3.46% and 7.80±3.18%, respectively. (2) The digestion rate of dry matter, protein, fat and carbohydrate of feces for both fishes are 58.54±9.53% and 68.57±8.98%, 74.49±7.96% and 80.41±9.02%, 90.23±15.33% and 84.24± 6.96%, 49.14±20.67% and 60.36±11.29%, respectively, tively.

鱼粪代表天然水体中有机碎屑,研究鲢、鳙对鱼粪的消化利用,并评价有机碎屑在鲢、鳙营养中的作用。在实验室条件下(水温30℃,溶氧6毫克/升以上,pH7—8,光照度2800lx),收集鲢、鳙摄食微囊藻后排出的粪作为试验用饲料。在限制摄食量的条件下,测定鱼对鱼粪的消化率及研究鱼粪对鲢、鳙生长的影响。研究结果是:(1)鲢、鳙对鱼粪中干物质消化率分别为58.54±9.53%及68.57±8.98%。其中蛋白质消化率分别为74.49±7.96%及80.41±9.02%,脂肪消化率分别为90.23±15.33%及84.24±6.96%,碳水化合物分别为49.14±20.67%及60.36±11.29%;(2)经10天饲养,鲢、鳙体重增重率分别为6.25±3.46%及7.80±3.18%。根据鱼粪的营养价值及鲢、鳙对鱼粪的能量转化率,表明鲢、鳙鱼粪在鲢、鳙营养中起着一定作用。

In this experimental study, grass carp were bred in rice field (1.9 fish/m2) to control mosquito larvae. 78 days after treatment, the larvae population of An. sinensis and Cu. tritaeniorhynchus dropped down by 87.4% and 80% respectively. Newly hatched 1-2 instar larvae accounted for 73.3% of the larvae remained in rice field after treatment. Eighty-nine samples of fish feces taken from rice field and 10 fishes were examined for breathing sy-phons of mosquito larvae. Breathing syphons were found in 22 fecal samples...

In this experimental study, grass carp were bred in rice field (1.9 fish/m2) to control mosquito larvae. 78 days after treatment, the larvae population of An. sinensis and Cu. tritaeniorhynchus dropped down by 87.4% and 80% respectively. Newly hatched 1-2 instar larvae accounted for 73.3% of the larvae remained in rice field after treatment. Eighty-nine samples of fish feces taken from rice field and 10 fishes were examined for breathing sy-phons of mosquito larvae. Breathing syphons were found in 22 fecal samples (24.7% posi-live) and 3 fishes (30% positive). The average number of mosquito larvae devoured by one fish was 861.5 in 24 hours in tap water and 661 in 24 hours in water containing grass and aquatic plants. The simulated field test showed that the average number of mos-quito larvae devoured by fish was 362 larvae in 24 hours. The field trial indicated that the grass carp could not only cut down the mosquito larvae population but also benefit the peasants by increasing the production of both fish and rice.

在稻田中放养1.9尾细/m~2草鱼,78d后中华按蚊幼虫密度下降87.4%,三带喙库蚊幼虫密度下降80.0%,残存的幼虫有73.3%为新孵化的1—2龄幼虫。抽样解剖10条鱼的30%和89份鱼粪中有24.7%检出蚊幼的呼吸管(孔)。在盛清水的容器中,每条鱼24h平均捕食蚊幼861.5只,容器中加入草和藻类等食料后,捕食蚊约为661只,在模拟稻田中鱼仅捕食蚊幼362只。试验的结果证实草鱼能捕食大量蚊幼,降低稻田中蚊幼密度,同时也增加了稻谷和鱼的产量。

 
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