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leaves
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    Photoprotective Mechanisms and Regulation of PSⅡ Photochemistry in Rumex Leaves under NaCl Stress
    NaCl胁迫下杂交酸模叶片光破坏防御机制以及PSⅡ光化学效率的调节
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    The Roles and Signaling of H_2O_2 and Calcium/Calmodulin in the ABA-Induced Antioxidant Defense in Leaves of Maize Plants
    H_2O_2,Ca~(2+)/CaM在ABA诱导的玉米叶片抗氧化防护中的作用及其信号转导
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    STUDIES OF THE INFLUENCE OF THE EARLY-SENESCENCE OF WHEAT LEAVES ON THE GRAIN YIELD WITH ~(14)CO_2 AS A TRACER
    用~(14)CO_2示踪研究小麦叶片早衰对籽粒产量的影响
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    STUDY ON GENETIC CONTROL OF PHOTOSYNTHESIS OF SOYBEAN LEAVES OF THE PROGENIES OF GENERATIVE CROSSES
    大豆有性杂交后代叶片光合作用遗传控制的研究
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    SUPEROXIDE DISMUTASE ACTIVITY AND LIPID PEROXIDATION IN RELATION TO SENESCENCE OF RICE LEAVES
    水稻叶片的衰老与超氧物歧化酶活性及脂质过氧化作用的关系
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    A STUDY OF PHYSIO-ECOLOGY OF PHOTOSYNTHESIS IN SOYBEAN Ⅲ. THE MORPHOLOGICAL AND ANATOMICAL FEATURES OF SOYBEAN LEAVES AND PHOTOSYNTHETIC RATE
    大豆光合生理生态的研究——第3报 大豆形态解剖特征与光合作用速率
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    PRELIMINARY STUDY ON PRINCIPAL BIOCHEMICAL COMPOSITIONS OF TEA NEW SHOOTS AND OLD LEAVES UNDER VARIOUS CONDITIONS
    不同条件下茶树新梢和老主要生化成份研究初报
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    CHANGES IN PHOTOSYNTHETIC RATE OF OVERWINTERED LEAVES OF TEA PLANTS IN SPRING
    茶树越冬春季光合速率的变化
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    A Study on function mobalotism within the spring wheat leaves in different positions
    春小麦不同位的代谢功能的研究
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    STUDY ON HARVESTING BOTH SEED AND LEAVES AS FORAGE IN SOYBEAN—Effects of Plucking Leaves on Yield in Soybean Cultivars
    大豆收获籽粒兼采饲用研究——Ⅰ、采对不同大豆品种的影响
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  叶的
    STUDIES ON THE RELATIONSHIP BETWEEN ROOT GROWTH AND YIELD IN MAIZE (ZEA MAYS)——Ⅱ.The Interaction of Root System and Leaves of Maize and Its Relation with Yield
    玉米根系的生长规律及其与产量关系的研究——Ⅱ.玉米根系与叶的相互作用及其与产量的关系
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    Pressure-volume Analysis of Soybean and Cowpea Leaves
    大豆和豇豆叶的压力-容积曲线分析
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    To determine the effect of the Paclobutrazo1 on wheat physiological and yield,during the wheat elongation stage,different concentration of the Paclobutrazo1 solution(0,100,200 and 400 mg/L) were sprayed on the wheat leaves,the content of chlorophyll,net photosynthetic rate,superoxide dismutase activity(SOD),catalase activity(CAT) of the flag leaf,the content of malondialdehyde(MDA),soluble protein content and the index on economic output in the seeds were measured in different periods after spraying.
    为探明多效唑(PP333)对小麦叶片衰老生理生化及产量的影响,在小麦拔节期,以不同质量浓度(0,100,200和400 mg/L)的多效唑水溶液进行叶面喷施处理,分别测定扬花后不同天数小麦旗叶的叶绿素含量、净光合速率、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、丙二醛含量(MDA)、可溶性蛋白质以及与产量性状相关的指标。
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    AN ANATOMICAL STUDY ON THE FLAG LEAVES OF COLD TYPICAL WHEAT
    冷型小麦旗叶的形态解剖学研究
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    Photoinhibition and 77K Fluorescence Spectra in the Flag Leaves of Super-high Hybrid Rice (Oryza sativa L.)
    超高产杂交稻剑叶的光抑制及其77K荧光光谱特性
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    A Preliminary Report on Selection of Bao-Zhen-Nan A-A Sterile Line of BT Type with Smooth Leaves
    BT型光身不育系──包珍兰A选育初报
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    The Relationship Between Carbohydrate Contents in Leaves and Resistance of Wheat Varieties to Powdery Mildew (Erysiphe graminis f. sp. tritici)
    小麦品种抗白粉病性与糖分含量的关系
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    Effects of Myzus persicae(Sulzer)Damage on the Content of Chemical Components and Properties of Tobacco Leaves
    烟蚜Myzus persicae为害对烟叶化学成分含量及性状的影响
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    Effect of Treatment at Different Temperature on Peroxidase and Esterase Tsozyme in Spring Wheat Seedling Leaves
    不同温度处理对春小麦幼苗叶内过氧化物酶和酯酶同工酶的影响
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    THE EFFECT OF LIGHT PERIOD AND WAVELENGTH ON ACTIVITY OF CHLOROPLAST Ca~(2+)-ATPase IN LEAVES OF NONGKEN 58S
    光照长度和光质对农垦58S叶绿体Ca~(2+)-ATP酶活性的影响
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  leaves
ANTIMICROBIAL AND PHYTOCHEMICAL STUDIES ON THE LEAVES OF PHYLLANTHUS SINGAMPATTIANA (SEBASTINE >amp; A.N.
      
Leaves of Phyllanthus singampattiana, locally known as Aathuchadai by the Kanis of Tamil Nadu in India is consumed for curing jaundice, diarrhea and dysentery.
      
RENI is positively correlated with the wet biomass of aboveground level stems, branches, and plant leaves, and with the species richness of phytocommunities.
      
The volatiles from leaves of different host plants such as Malus pumila, P.
      
euphratica leaves increased rapidly at the beginning of salt stress with a light soil NaCl concentration of 58.5 mmol/L.
      
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For the study of the influence of oxidation-reduction conditions of thesoil on the growth of rice plant,pot experiments with three paddy soilswere conducted.The used soils included an acid paddy soil derived from quartiary red clay,an acid mountain paddy soil derived from granite anda neutral alluvial paddy soil.It was found that the application of green manure just before plantingin amount equivalent to 1% of the soil led to the retardation of growth ofrice as compared with the control treatment;dry weights...

For the study of the influence of oxidation-reduction conditions of thesoil on the growth of rice plant,pot experiments with three paddy soilswere conducted.The used soils included an acid paddy soil derived from quartiary red clay,an acid mountain paddy soil derived from granite anda neutral alluvial paddy soil.It was found that the application of green manure just before plantingin amount equivalent to 1% of the soil led to the retardation of growth ofrice as compared with the control treatment;dry weights of tops of riceplant amounted to only 78%,22% and 45% respectively of the controls forthe three soils.The difference in growth between the two treatments wasmost remarkable in the early period of plant growth.If the green manurehad been decomposed for one month in pot under semi-aerobic conditionsbefore planting,then the unfavorable effect could be noted only in theneutral alluvial paddy soil which contained a relatively larger amount oforganic matter.The improvement of oxidation-reduction conditions of the soil by inter-mittent applications of hydrogen peroxide and keeping the soil moisturecontent at a level of about 50—70% of water-holding capacity instead ofwaterlogging improved plant growth in soils with intensive reductionprocesses,the effect being most conspicuous in the acid mountain paddysoil where the unfavorable effect of green manure was also most remark-able.Measurements of oxidation-reduction potentials of leaves and stalks ofrice showed that the potentials were lowest when grown in pots with greenmanure,and were highest when hydrogen peroxide had been applied intothe soil.There was also a rough correlation between potentials determinedwith platinum electrode and with quinhydrone electrode,thus indicatingthat the redox systems of rice plant when grown under different oxidation-reduction conditions were not the same both expressed as intensity factor(redox potential)or as quantity factor(the change in redox potential ofquinhydrone).For the purpose of explaining the unfavorable effect of intensively re-duced conditions of the soil on the growth of rice plant,it was noted thatthere was a parallelism between the amounts of exchangeable and water-soluble ferrous iron of the soil and the magnitudes of unfavorable effect.Further pot experiment confirmed this supposition,in which the applicationof ferrous sulfate in amount of 50 mg.iron per 100 grams of soil alreadyled to the retardation of growth of rice.Conclusions were made that the unfavorable effect of reduction condi-tions of paddy soils on the growth of rice was due to the excessive amountof reduced materials,in which ferrous iron probably occuppied an out-standing position,and measures leading to the improvement of oxidation-reduction conditions of the soil could overcome this unfavorable effect.

1.土壤处于强烈的还原条件下时,对水稻生长有不良的影响,如果将土壤中的氧化还原条件改善,则对水稻的生长有益。2.土壤中的氧化还原情况,直接影响水稻体中的氧化还原电位,土壤电位低者,水稻中的电位也低。3.土壤中还原性物质的数量与水稻生长情况表现了明显的一致性,可见水稻在强烈还原条件下的生长不良,与还原性物质的过多有关。在还原性物质中,亚铁离子约占一半左右。4.试验结果指明,土壤中过多的亚铁离子,对水稻有毒害作用。

The present paper deals with the influence of the intensity and its persistence of nitrogen supply to the formation and development of the organs of rice plant and also with the resulting physiological feature of these influences. Pot culture experiments with paddy soils were conducted in open field. Organic manure and ammonium sulphate were applied at different stages of growth, i.e. tillering, internode elongating and panicle differentiating stage. The results are summarized as follows:1. Experiments revealed...

The present paper deals with the influence of the intensity and its persistence of nitrogen supply to the formation and development of the organs of rice plant and also with the resulting physiological feature of these influences. Pot culture experiments with paddy soils were conducted in open field. Organic manure and ammonium sulphate were applied at different stages of growth, i.e. tillering, internode elongating and panicle differentiating stage. The results are summarized as follows:1. Experiments revealed that various organs of rice plant gave different responses to the status of nitrogen supply, and to the same organs, their responses of nitrogen varies at different stages of growth. At the tillering stage, a strongly intensified and less persistent supply of nitrogen, as in the case of ammonium sulphate, promoted the assimilation of dry matter in leaf blade, and consequently enlarged the leaf areas. Such an effect on the leaf blade, however, terminated after the internode elongating stage, and more accumulation of dry matter was found in the stems. Top dressing of manures, pertinently after the internode elongating stage, gave a moderate but persistent supply of nitrogen at that time and resulted the formation of large and healthy ears. Under theexperimental condition, such treatments have been proved favourable to the growth and yield of rice.2. The influence on the growth of the organs, as resulted by changing the status of nitrogen supply, is mainly induced by the rate of accumulation and translocation of nitrogen in plant. A strongly intensified, but less persistent, nitrogen supply accelerates the rate of translocation of nitrogenous materials, while a less intensified but rather persistent supply of nitrogen retains more nitrogenous materials in leaf blade.3. It is evidently that the demand of nitrogen supplying status of rice plant differs at different growing stages. Under the experimental condition, high yields of rice crops were attained by a slower but persistent rate of nitrogen suppy in the tillering stage; a faster but less persistent rate in the internode elongating stage and also a moderate but persistent rate in the penicle differentiating stage. Since property of soil nitrogen varies in different soil type, the regulation of nitrogen supplying status by fertilization should be different in cach cases.

1.晚稻植株的不同器官对氮素供应状况的反映不同,其中叶片較为敏銳。而同一器官在不同生育时期內影响也不一样谂柙缘奶跫?叶片在分蘖期中,氮素供应強度大、持續时間短比強度小、持續时間长的处理更能促进叶片干物貭累积,增大叶面积。而拔节期以后,影响不明显并略有相反趋势。对于茎稈則在供应強度大及其持續时間短的情况下,不論拔节期或分化期处理都明显地促进其干重的增加。穗粒的形成条件却是強度小而持續时間长的有利于每穗粒数的提高。但是,氮素供应状况的影响显著与否还可能受着基肥水平的制約,在高量基肥的条件下影响极不显著。2.土壤氮素供应状况影响器官生长的原因,初步看来是通过对植株体內氮素累积和运轉速度的影响而发生作用。由于不同生育时期內,叶、鞘、茎、穗本身的生长特点各异,所要求的物貭累积与运轉的強度也各不相同。因此,氮素供应状况对器官生长的影响也就不全相同。3.根据試驗結果,初步认为水稻对土壤氮素供应状况的要求是分蘗初期緩而长,拔节期快而短,穗分化期緩而长。因此,結合不同土壤的供肥特点需要利用有机厩肥或速效化肥等性貭不同的肥料在次数及用量上加以調节。4.初步认为施肥原則掌握的主要內容是根据水稻器官协調生长的需要以調节土壤的氮素...

1.晚稻植株的不同器官对氮素供应状况的反映不同,其中叶片較为敏銳。而同一器官在不同生育时期內影响也不一样谂柙缘奶跫?叶片在分蘖期中,氮素供应強度大、持續时間短比強度小、持續时間长的处理更能促进叶片干物貭累积,增大叶面积。而拔节期以后,影响不明显并略有相反趋势。对于茎稈則在供应強度大及其持續时間短的情况下,不論拔节期或分化期处理都明显地促进其干重的增加。穗粒的形成条件却是強度小而持續时間长的有利于每穗粒数的提高。但是,氮素供应状况的影响显著与否还可能受着基肥水平的制約,在高量基肥的条件下影响极不显著。2.土壤氮素供应状况影响器官生长的原因,初步看来是通过对植株体內氮素累积和运轉速度的影响而发生作用。由于不同生育时期內,叶、鞘、茎、穗本身的生长特点各异,所要求的物貭累积与运轉的強度也各不相同。因此,氮素供应状况对器官生长的影响也就不全相同。3.根据試驗結果,初步认为水稻对土壤氮素供应状况的要求是分蘗初期緩而长,拔节期快而短,穗分化期緩而长。因此,結合不同土壤的供肥特点需要利用有机厩肥或速效化肥等性貭不同的肥料在次数及用量上加以調节。4.初步认为施肥原則掌握的主要內容是根据水稻器官协調生长的需要以調节土壤的氮素供应強度及其持續时間,造成最和諧与最有效的土壤——植物供求关系。

Photophosphorylation of isolated chloroplasts mediated by phenazine methosulphate(PMS) menadione bisulphite(Vit. K), flavinmononucleotide(FMN) as well as by ferricyanide[Fe(CN)_6] and its coupled Hill reaction was studied in flashing light. Natural sunlight focused by convex lenses to an intensity of about 300,000lux and intercepted by a rotating disc was used as the flashing source(Fig. 1). Chloroplasts were prepared from young leaves of water-cultured wheat seedlings as described earlier. ATP was measured...

Photophosphorylation of isolated chloroplasts mediated by phenazine methosulphate(PMS) menadione bisulphite(Vit. K), flavinmononucleotide(FMN) as well as by ferricyanide[Fe(CN)_6] and its coupled Hill reaction was studied in flashing light. Natural sunlight focused by convex lenses to an intensity of about 300,000lux and intercepted by a rotating disc was used as the flashing source(Fig. 1). Chloroplasts were prepared from young leaves of water-cultured wheat seedlings as described earlier. ATP was measured as ~(32)P incorporated by the method of Nielsen and Lehninger.With flashes of 1 millisecond, the yield per flash increases with, the length of the dark time up to a maximum. The maximum dark time for the Vit. K and Fe(CN)_6 coupled Hill reaction is 0.05-0.07 sec at 10-20℃(Fig. 2, 3 & 4). For PMS, the maximum dark time is 0.03 sec(Fig. 2). Higher temperature shortens the dark time in both Vit. K and PMS systems. The maximum yield per flash is higher in the Vit. K system than with PMS. Yield per flash increases with temperature(Fig. 2).o-Phenanthroline(3×10~(-5)M) inhibits the dark reaction in both systems to a similar extent. The maximum yield per flash is inhibited by about 85% in the Vit. K system and only 40% in the PMS system. sThe similarity of the dark time requirement of the photophosphorylation mediated by Vit. K, FMN, Fe(CN)_6 and its coupled Hill reaction to that of photosynthesis indicates that the limiting reaction is perhaps common to all, involving the photosynthetic electron-carrier chain, including the participation of molecular oxygen. The short dark in(?)erval required by the PMS system as well as its different response to o-phenanthroline shows that PMS mediates a different pathway probably a"short cut".Further investigations on the dependence of yield on the flash duration and its relation to temperature, cofactors and inhibitors will be reported in a succeeding paper.

1.在1×10~(-3)秒強閃光下,Vit K,FMN及Fe(CN)_6~≡偶联的光合磷酸化的每閃产量达到最高所需的暗时間相等,在10—20度时为0.05—0.07秒。这与光合作用及希尔反应的暗反应速度相似。而循环光合磷酸化所需的暗时間却要短1—2倍。2.Vit K所导致的光合磷酸化的最高每閃产量高于PMS系統,且都受温度及閃时长短的影响。3.Vit K系統的最高每閃产量被3×10~(-5)二氮杂菲抑制了85%,而PMS系統則仅抑制40%。两系統的暗反应都受到程度相近的抑制。4.文章討論了PMS及Vit K系統途径的差异与暗反应速度之間的关系。

 
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