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  chilling
    EFFECT OF PP333 ON THE GROWTH, LEAF STRUCTURE AND CHILLING RESISTANCE OF RICE SEEDLING
    PP333对水稻幼苗的生长、叶片结构和抗性的影响
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    Study on the Physiological and Biochemical Differences Between Soybean Cultivars With Different Chilling—resistences
    抗性不同的大豆品种生理生化差异研究
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    THE EFFECT OF LOW TEMPERATURE ON H_2O_2 AND ITS CLEARANEC ENZYMES IN MAIZE SEEKLINGS WITH DEFFERENT CHILLING RESISTANCE
    低温对不同抗性玉米幼苗H_2O_2及其清除酶类的影响
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    CHANGE OF THE MEMBRANE PROTECTIVE SYSTEM DURING THE ENHANCEMENT OF CHILLING RESISTANCE INDUCED BY COLD HARDENING AND ABA TREATMENT IN RICE SEEDLINGS
    锻炼和ABA诱导水稻幼苗提高抗性期间膜保护系统的变化
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    Study of the Relationship between Cotton Seedlingswith Chilling Resistance and Their POD
    棉苗抗性与POD活性变化关系的研究
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    Cloning and Expression of Cold-tolerance Gene from Dongxiang Wild Rice and OsClpD Gene from Rice (Oryza Sativa. L.)
    东乡野生稻耐基因和水稻ClpD基因的克隆与表达研究
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    Studies on the Cold-Resistance Ability and Cloning and Expression of SAD Gene of Jatropha Curcas
    麻疯树的抗性和SAD基因的克隆及表达研究
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    A BRIEF DISCOURSE ON THE PRODUCTIVE POTENTIALITY OF SPRING WHEAT IN THE COLD-COOL IRRIGATED AREAS IN HEXI CORRIDOR ALONG THE QILIAN MOUNTAINS
    略论甘肃省河西沿祁连山凉灌区春小麦的生产潜力
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    STUDIES ON COLD-RESISTANCE IN MAIZE Ⅱ SCREENING METHODS AND NDICES
    玉米抗性鉴定Ⅱ-筛选方法和指标
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    STUDIES ON THEAPPRAISAL METHODS OF COLD-RESISTANCE IN RICE SEEDLINGS
    鉴定水稻幼苗抗力的方法探讨
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  chilling
The development rate of embryos reconstructed with skin fibroblasts of different passage number and somatic cells of different chilling durations showed no significant difference.
      
Mechanical damage of the cuticle, treatment with deltamethrin, and chilling of the caterpillars induced similar changes in the hemolymph pattern of esterase activity.
      
The involvement of acyl-lipid Δ9-desaturase in the development of chilling tolerance of sensitive plants
      
Nanocrystalline Iron Particles Synthesized without Chilling by Chemical Vapor Condensation
      
Iron nanoparticles were synthesized without a chilling device in a condensation system of gases vaporized from iron pentacarbonyls as starting precursors.
      
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我国绿肥多分布于高温多湿的长江流域,陕西绿肥亦多集中于秦岭以南。半干旱的关中地区是否有发展绿肥的可能性?在农业工作者中认识极不一致,有进一步研究的必要。关中年降雨量在500—700毫米之间,夏闲期(6—9月)正值高温多雨季节,对绿肥的生长、翻压和分解十分有利。但由于降雨量在地区上的分布不均,且年雨量变化大,特别是春旱较严重,对旱地绿肥播种、生长、翻压却又带来了一定的风险。从关中豆科绿肥的种类来衡量,夏播绿肥,如绿豆、黑豆、小豆等,和夏末秋初播种的毛苕,其播种、生长及翻压期均在雨季或雨季后的湿润气候条件下,栽培成功的可能性最大。草木樨系春季套播于麦田,与主要作物还有着较复杂的关系,且生长期长,经春、夏、秋三个季节,而春旱是播种、出苗和保苗的主要威胁。解决草木樨出苗和保苗的主要措施是,冬季播种或早春解冻初期播下,借助于解冻水分把苗出好。早春不但土壤湿度高,且小麦荫蔽不大,有利于出苗和根系的发育。只要根系发育良好,草木樨耐旱力强,保苗问题可以获得解决。7、8、9月为关中雨季,也是草木樨生长和翻压有利的季节。只要掌握在7月底到8月上旬进行翻压,对绿肥的分解及土壤蓄墒均无不良影响,在一般正常气候的条件下,关中旱地发展草...

我国绿肥多分布于高温多湿的长江流域,陕西绿肥亦多集中于秦岭以南。半干旱的关中地区是否有发展绿肥的可能性?在农业工作者中认识极不一致,有进一步研究的必要。关中年降雨量在500—700毫米之间,夏闲期(6—9月)正值高温多雨季节,对绿肥的生长、翻压和分解十分有利。但由于降雨量在地区上的分布不均,且年雨量变化大,特别是春旱较严重,对旱地绿肥播种、生长、翻压却又带来了一定的风险。从关中豆科绿肥的种类来衡量,夏播绿肥,如绿豆、黑豆、小豆等,和夏末秋初播种的毛苕,其播种、生长及翻压期均在雨季或雨季后的湿润气候条件下,栽培成功的可能性最大。草木樨系春季套播于麦田,与主要作物还有着较复杂的关系,且生长期长,经春、夏、秋三个季节,而春旱是播种、出苗和保苗的主要威胁。解决草木樨出苗和保苗的主要措施是,冬季播种或早春解冻初期播下,借助于解冻水分把苗出好。早春不但土壤湿度高,且小麦荫蔽不大,有利于出苗和根系的发育。只要根系发育良好,草木樨耐旱力强,保苗问题可以获得解决。7、8、9月为关中雨季,也是草木樨生长和翻压有利的季节。只要掌握在7月底到8月上旬进行翻压,对绿肥的分解及土壤蓄墒均无不良影响,在一般正常气候的条件下,关中旱地发展草木樨绿肥的可能性是存在的。从关中降雨、气温及作物布局来考虑,秦岭以北、渭河以南和省西平原区,年雨量在600—700毫米之间,且分布较均匀,为多种绿肥发展的有利地区。省西北山沼山丘陵区及渭北高原区降雨量在600毫米左右,但气候凉,适于发展夏播短期绿肥及毛苕绿肥。省中、省东旱塬区,年雨量为500毫米左右,夏秋雨季常错前推后,变化较大,夏播绿肥及草木樨的栽培均有较大的风险,但总雨量能满足毛苕的需要,发展棉田绿肥毛苕有较大的希望。

Using polyacrylamide gel electrophoresis with the staining of the enzymes,the constitutive isoenzyme components of peroxidase and esterase in three subtropical crops i.e., rice (Oryza sativa L. subsp. Hsien, Ting), cucumber (Cucumis sativa L.) and Agave (Agave sp.) with different degrees of tolerance to chilling temperature were studied.The isoenzyme of peroxidase exhibited significant variation in the three species studied as well as in the cultivars within the species. It was found that the number of component...

Using polyacrylamide gel electrophoresis with the staining of the enzymes,the constitutive isoenzyme components of peroxidase and esterase in three subtropical crops i.e., rice (Oryza sativa L. subsp. Hsien, Ting), cucumber (Cucumis sativa L.) and Agave (Agave sp.) with different degrees of tolerance to chilling temperature were studied.The isoenzyme of peroxidase exhibited significant variation in the three species studied as well as in the cultivars within the species. It was found that the number of component bands varied with the species and the cultivars. No matter whether the temperature was chilling or normal, the more tolerant cultivar usually had 1 to 6 more bands than the non-tolerant ones. Under the chilling temperature, the cultivars of different chilling sensitivity in rice, cucumber and agave all showed distinct change in the isoenzyme composition of peroxidase. The more chilling-tolerant lines had higher activity in peroxidase as well as additional isoenzyme component(s).The isoenzyme of esterase under the chilling temperature also showed some increase in activity and in the number of component bands, But, it didn't show significant difference between the lines of different sensitivity. In rice cultivar Zhen-zhu-ai, there was no variation in esterase isoenzyme composition when it was treated with the chilling temperature.The experimental results indicated that the activity and the isoenzyme component of peroxidase were strongly affected by the temperature while those of esterase were relatively stable regardless of chilling effect. It seemed that the number of isoenzyme band and their activities varied which was closely related to the difference in tolerance. Therefore, the resistance of plant to adversed temperature is closely related to the enzyme system and its change in the functional activity.

过氧化物酶同工酶在各植物种和品种之间存在着明显的差异,同工酶区带数随着物种和品种而变,不论在常温或低温下,一般抗性强的比抗性弱的多出1~6条区带。低温处理后水稻、黄瓜、龙舌兰麻各品种均可观察到显著的变化,除皮带麻低温处理后同工酶区带减少,某些区带活性减弱外,其余各品种均出现1~3条新的同工酶区带,越耐的品系区带活性越大。酯酶同工酶在低温下,除水稻的珍珠矮酶谱的区带数不变,皮带麻某些同工酶区带减少外,其余品种有些出现了新的同工酶区带,有些区带则增强了活性。试验结果表明植物过氧化物酶的活性和同工酶区带数明显地受温度所影响,而酯酶受低温影响相对比较稳定。过氧化物酶和酯酶同工酶区带的数目及其相对活性的改变似乎与植物的抗力有关,亦即植物对不良温度抵抗力的水平与植物酶系统的合成和它的功能活性的改变有关。

Cold injury which influence riee production in different rice growing countries oc- curs at various growth stages.The degree of cold injury depends on the air or water temperature,the cropping pattern,the growth stage of the rice and other factors.It is generally aeeepted that cold tolerance of rice at one stage is different from another stage.However,Okabe and Toriyama reported that varieties seem to respond simi- larly to cold temperature at different growth stages.Some varieties have been found to be tolerant...

Cold injury which influence riee production in different rice growing countries oc- curs at various growth stages.The degree of cold injury depends on the air or water temperature,the cropping pattern,the growth stage of the rice and other factors.It is generally aeeepted that cold tolerance of rice at one stage is different from another stage.However,Okabe and Toriyama reported that varieties seem to respond simi- larly to cold temperature at different growth stages.Some varieties have been found to be tolerant at different growth stages. The purpose of this experiment is to find whether cold tolerance scores at different growth stages of different kinds of riee are correlated or not.

从国际水稻研究所种质库取得50个水稻品种,其中包括粳型品种12个,釉稻18个,爪哇型品种10个,釉×粳杂种3个,以及野生稻7个。在芽期、苗期、移栽期、孕穗期、开花期,进行了耐性的测定。结果指出,在不同的水稻类型中,其耐性的次序为:粳稻>爪哇型>秈稻>野生稻。从本实验所采用的有限量的品种来看,在苗期粳型品种的耐性比其它类型好;在开花期某些爪哇型品种比粳型品种好;在芽期和苗期之间,以及在芽期和开花期之间,其耐性有明显的正相关。在其它时期之间未找到这种相关性。这指出,在特殊地区的低温发生时期的一定生育阶段中,进行筛选是必要的。

 
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