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发达根系
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  much root system
    The plants with much root system could keep the biological mass higher level compared with not croping,The microbial biomass could be regarded as a sensitive parementer in the effect of cultivation and managing measures on soil fertility
    具有发达根系的植物使土壤微生物生物量维持在较高的水平,土壤微生物生物量的变化可做为栽培管理措施对土壤肥力影响的灵敏指标。
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  “发达根系”译为未确定词的双语例句
    The results also show that the rice variety which could obtain higher yield at a low N rate had a greater potential of absorbing and utilizing N from the soil with following characteristics: 1) a well developed and vital root system with a greater root volume and distribution density, and a higher affinity to NH~+_4, i. e. with a smaller K_m value;
    结果还表明在低N条件下产量较高的品种吸收利用土壤中N素能力较强,其相关的生物学和生理学特征为:1.根系发达,根系生长量、分布密度以及根对NH_4~+的亲和力均较大;
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    Rooting medium was MS+IAA 0.2 mg/L+NAA 0.1 mg/L,and its average rooting rate was 85%. All the plantlets flowered and set fruits normally in the field.
    伸长的不定芽培养在添加IAA 0.2 mg/L和NAA 0.1 mg/L MS培养基中,有85.0%的不定芽形成发达根系,移栽后全部正常开花结果.
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    1. Uniconazole inhibits the growth of shoot and promotes the growth of root simultaneously, decreases the leaf area of middle and private leaves significantly (P0.05 r P<0.01), the higher of the concentration, the less of the main stem leaf area.
    1.烯效唑(S_(3307))处理控上促下,促进分蘖与根系的生长,形成具健壮发达根系的壮苗,同时又具有控前促后的作用,显著或极显著降低了中下部叶片的叶面积和主茎总叶面积,其抑制作用随浓度增大而增强,随氮素水平的提高其抑制作用减弱,但促蘖作用增强;
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    Although Bakhtin does not sum up a tight logical system for carnival poetics, we can find a root system based on Bakhtin's philosophical thoughts under some separate concept trees.
    巴赫金虽然没有为狂欢诗学网结一个严密的逻辑体系,但在一株株看似孤立的概念之树的下面,我们能寻绎出一个交错盘结的发达根系,它们扎根于巴赫金哲学思想的土层深处,生长出一片繁茂的森林。
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    The study shows that the plant has a relatively shallow but well laterally developed root system. The depth and weight of the root are 4.55 and 2.32 times as much as the above-ground height and biomass respectively.
    研究表明,驴驴蒿入土较浅,根深为株高的4.55倍,侧根发达,根系重量为地上生物量的2.32倍。
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This paper deals with the experimental results for raising induction of rooting and the survival rate of transplantation on tectona after the leafy shoots have been obtained under the culture of shoot-tips in vitro. These results show that the success of rooting is affected by several factors.The principal factors are auxin and its concentration.Three kinds of auxin (i.e.IAA, IBA and NAA) are used for induction of rooting,among them IBA is considered to be the best.The efficiency of rooting is apparently affected...

This paper deals with the experimental results for raising induction of rooting and the survival rate of transplantation on tectona after the leafy shoots have been obtained under the culture of shoot-tips in vitro. These results show that the success of rooting is affected by several factors.The principal factors are auxin and its concentration.Three kinds of auxin (i.e.IAA, IBA and NAA) are used for induction of rooting,among them IBA is considered to be the best.The efficiency of rooting is apparently affected by the physical state of the medium.When the concentration of sucrose in MS medium is raised to 4—6% the rooting rate can be increased and the root systems can grow rapidly and profusely. However,when the temperature of culture is below 22℃,the rate of inducing roots is inhibited.Rootings of shoots are sensitve to temperature.The period from the first to the eighth days after the induction of rooting is considered as a sensitive period. After cutting off 5 mm portions below the nodes from the lowen part of stems,the base of these cuttings is soaked in 500 ppm IBA solution for 9 hrs,then place the cuttings into the filter paper bridges standing in a liquid MS medium free from plant growth regulators which containing 4% sucrose,and incubated at 24—28℃.After 2—3 weeks the root system is formed.The rooting rate obtained is 95—100%. Before root induction,what is more important for raising the survival rate of transplantation for plantlets is to place rootless-plantlets under natural diffuse light (ca.5000 Lux.) in vitro before root induction.After transplantation,if temperature is controlled below 27℃,and the relative humidity above 85%, 90—95% of rooting can be obtained.

影响诱导生根效果的主要因素有生长素种类和浓度,其中以 IBA 诱导效果最好。培养基的物理状态也明显影响生根效果。MS 培养基中的蔗糖浓度提高到4—6%,可提高生根率,利于形成发达的根系。温度对根的发生是敏感的,在诱导生根开始的1-8天是一个敏感期,低于22℃明显地抑制根的发生和生长。诱导生根前将无根幼苗置于自然散射光下培养,移栽后尽量缩短加罩保湿时间,对提高试管苗移栽成活率尤为重要。移栽后温度控制在27℃以下。空气湿度在85%以上,加罩时间7天,成活率可达90-96%。

This experimed was carried out on the sown area of Astragalus adsurgens in sendarid Wuqi County during the period from 1980 to 1985. The survey showed that the life of Astragalus adsurgens from thrivingness to decline is a rapid succession series. Its importance value changed obviously. Astragalus adsurgens grew luxuriantly from 3 to 5 years, while the growth of natural herbs were restrained. Astragalus adsurgens can fully use water in soil with a developed root system. The water in declined Astragalus adsurgens...

This experimed was carried out on the sown area of Astragalus adsurgens in sendarid Wuqi County during the period from 1980 to 1985. The survey showed that the life of Astragalus adsurgens from thrivingness to decline is a rapid succession series. Its importance value changed obviously. Astragalus adsurgens grew luxuriantly from 3 to 5 years, while the growth of natural herbs were restrained. Astragalus adsurgens can fully use water in soil with a developed root system. The water in declined Astragalus adsurgens grassla- nd was faster than that in natural grassland and farmland. The soil moisuret in upper layer of soil in declined Astragalus adsurgens grassland was higher than in natural grassland and farmland, advancing the growth of other plants. Astragalus adsurgens can improve the soil structure and change its physical and chemical properties. Thus, the goal of improving and bettering soil, as well as promoting the plant yield can be attained.

本试验于1980-1985年在半干旱的陕西省吴旗县沙打旺飞播区进行。试验结果表明:沙打旺从兴盛到衰败,出现一快速演替系列,其重要值有明显的变化。第3-5年沙打旺生长繁茂,草地内天然草受抑制。沙打旺能利用发达的根系,充分利用土壤水分。衰败沙打旺草地水分渗透速率比天然草地和农地快,上层土壤含水量恢复较好,这样,其它植物在衰败地上长得更好。沙打旺可改良土壤结构、改变土壤理化性质,达到改土培肥,促进植物增产的目的。

Our experimental results showed,paclobutrazol is very effective to controlovergrowing and promote tillering of late rice seedlings by means of spraying300 ppm paclobutrazol at 200 jin per mu at the stage of one mature leaf and onenew leaf of Iate rice seedlings.The height of the treated seedlings decreased by1/3—1/4 as against that of the control and the number of the tillers of the trea-ted seedlings raised by 80—120%.The physiological effects of paclobutrazol on the rice seedlings are sproutingvigorous roots,increasing...

Our experimental results showed,paclobutrazol is very effective to controlovergrowing and promote tillering of late rice seedlings by means of spraying300 ppm paclobutrazol at 200 jin per mu at the stage of one mature leaf and onenew leaf of Iate rice seedlings.The height of the treated seedlings decreased by1/3—1/4 as against that of the control and the number of the tillers of the trea-ted seedlings raised by 80—120%.The physiological effects of paclobutrazol on the rice seedlings are sproutingvigorous roots,increasing the ability of absorbing Nitrogen,increasing the contentof Nitrogen and chlorophyll and promoting the net photosynthetic rate of theseedlings.These are very advantageous to promote vegetative and reproductivegrowth of the treated rice plants in the Paddy-field period after transplanting.The results of normal field experiment and large area contrast experimentshowed that the yield of the treated raised by 10% as against that of the control.

本试验以常规稻6—38和杂交稻威优64等六个品种为材料,进行了新型植物生长调节剂——多效唑,对培育二晚壮秧和生理基础与增产效果的研究。试验结果表明;二晚秧苗在一叶一心期,每亩喷300PPM 浓度的多效唑100公斤药液,能有效地对二晚秧苗起到控长、促蘖、培育壮秧的作用。处理后秧苗的高度比对照降低1/3~1/4,分蘖数增加80~120%,叶片表现短、宽、厚,苗体矮壮。这种壮秧移栽本田后无败苗现象,没有明显返青期,禾苗早生快发,分蘖多、有效穗增加。多效唑对于秧苗的生理效应表现为;增加秧苗的发根力,具有发达的根系,吸氮能力增强,苗体含氮量和叶绿系含量增加:光合速率增强。处理后的秧苗,碳——氮代谢均旺,而且这种生理效应一直维持到抽穗期,有利于营养体生长和籽粒灌浆结实。试验表明,多效唑处理后水稻能增产10%左右。

 
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