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根系发达
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  developed root system
     Compared with the normal single-trunk seedling, the double-trunk seedling has well developed root system and its active absorption area increases by 43.7% and the dry weights of the root and stem as well as leaf are also higher than that of single-trunk seedling.
     与常规育苗(单干秧苗)比较,双干苗根系发达,根体积增大,活跃吸收面积增加43.7%,根、茎、叶各部的干重均高于单干苗。
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     The result indicated that application of rice strong sprout agent can improve seedling greatly in late rice wettish raise seedling , dry raise seedling or raise seedling by plastic tray , be manifested by : stocky seedling , developed root system , the age of leaves progress rapidly , tillering capacity better , individual has more tillers , accumulate more solid .
     结果表明 ,晚稻湿润育秧、旱育秧、塑料软盘育秧施用壮秧剂均能大大提高秧苗素质 ,主要表现为秧苗矮壮、根系发达、叶龄进展快、分蘖力强、单株带蘖多、干物质积累多。
短句来源
     A study on the anatomical structure of vegetative organs of Achnatherum splendens growing in salinized soil indicates that Achnatherum splendens are characterized in structure by well developed root system ,5~7 layers exodermis cells, cells outside the endodermis growing thick in the later stage of growth,polyarch root;
     对盐渍环境下芨芨草营养器官解剖结构的研究表明 ,芨芨草在形态结构上有如下特征 :根系发达 ,外皮层明显 ,为 5~ 7层扁平且极不规则的细胞 ,近内皮层处有几层小型的、排列非常整齐的细胞 ,形成环内皮层带。 发育后期 ,3、4层外皮层细胞壁加厚变为厚壁细胞 ,环内皮层带的细胞也变为厚壁细胞 ,属多原型根 ;
短句来源
     Plantlets growing in the medium of 1/2MS+0.1mg/L NAA+0.01mg/L IBA had developed root system. Survival ratio was high when this kind of plantlets was transplanted.
     在1/2MS+0.1mg/LNAA+0.01mg/LIBA成苗培养基中生长的植株根系发达,并具有较高的移栽成活率
短句来源
     The results indicated that when the seedling age was 70-80 days old, it had robust stem, heavier stems and root weight and higher ratio of root and shoot, and well developed root system, and its appearance reached the standard of strong seedling.
     结果表明,当烟苗生长达70~80d时,烟苗茎杆粗壮,茎、根较重,根冠比较大,根系发达,外观上达到了壮苗标准;
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  developed roots
     The former have characters of fast growth,quick canopy density,fine crown,developed roots,fine benefit of soil and water conservation,and bigger fruit (diameter of fruit reach 0.8-0.9 cm,weight per 100 fruit is 20-31 g),yield of fruit of one planted is 2-3 kg,higher Vc and oil content,its properties of ecology and economy is better than native wild seabuckthorn.
     前者生长迅速、树冠好、根系发达、郁闭快、水土保持效益好,且果实较大(果径0.8-0.9cm,百果重20-31g),单株产果量为2-3.5kg,Vc和含油量较高,其生态、经济性状较当地野生沙棘为好。
短句来源
     The biological properties were as follows: (1) Well developed roots.
     其主要的生物学特性是:(1)根系发达
短句来源
     Its developed roots have noticeable effects on holding water and soil.
     其根系发达固土效果显著;
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     The experiment demonstrated that well developed roots and strong ability to penetrate the roots into the Mn rich deep soil layer might explain the better tolerance of Mn deficiency in the tolerant genotypes.
     试验证明 ,耐缺锰品种在缺锰条件下因根系发达 ,且扎根较深对剖面下部土层中的锰利用能力强是其耐缺锰的一个重要原因
短句来源
     The expected results could be obtained by selecting individuals in separated populations of fast developed seedlings,well developed roots,and with capacities of early heading and fast milking.
     在对抗除草剂谷子选育时,应注重苗期发育快、根系发达、抽穗早、灌浆速度快的单株。
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  well developed root system
     Compared with the normal single-trunk seedling, the double-trunk seedling has well developed root system and its active absorption area increases by 43.7% and the dry weights of the root and stem as well as leaf are also higher than that of single-trunk seedling.
     与常规育苗(单干秧苗)比较,双干苗根系发达,根体积增大,活跃吸收面积增加43.7%,根、茎、叶各部的干重均高于单干苗。
短句来源
     A study on the anatomical structure of vegetative organs of Achnatherum splendens growing in salinized soil indicates that Achnatherum splendens are characterized in structure by well developed root system ,5~7 layers exodermis cells, cells outside the endodermis growing thick in the later stage of growth,polyarch root;
     对盐渍环境下芨芨草营养器官解剖结构的研究表明 ,芨芨草在形态结构上有如下特征 :根系发达 ,外皮层明显 ,为 5~ 7层扁平且极不规则的细胞 ,近内皮层处有几层小型的、排列非常整齐的细胞 ,形成环内皮层带。 发育后期 ,3、4层外皮层细胞壁加厚变为厚壁细胞 ,环内皮层带的细胞也变为厚壁细胞 ,属多原型根 ;
短句来源
     The results indicated that when the seedling age was 70-80 days old, it had robust stem, heavier stems and root weight and higher ratio of root and shoot, and well developed root system, and its appearance reached the standard of strong seedling.
     结果表明,当烟苗生长达70~80d时,烟苗茎杆粗壮,茎、根较重,根冠比较大,根系发达,外观上达到了壮苗标准;
短句来源
     A healthy seedling in growth period should have a well developed root system and a healthy vigorous top, the ratio of root-top should be high, the water content in seedling plant should be suitable and 60% soil moisture relative capacity was optimum.
     生根期壮苗的特征是根系发达,地上部生长健壮,根/冠比值较大,烟苗含水量适中,最适土壤相对持水量为60%左 右;
短句来源
     Effective microorganisms(EM) was applied on Lolium multiflorum. The results indicated that the treatment with EM resulted in a well developed root system and high growth rate. The total fresh weight of three harvests reached 96 165 kg/hm 2,which was 20.62% higher than that of contrast.
     在多花黑麦草上施用EM活菌制剂能促进根系发达 ,植株生长速度加快 ,3次刈割鲜草总产达 96 1 6 5kg/hm2 ,比对照提高产草量 2 0 6 2 %。
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  “根系发达”译为未确定词的双语例句
     1/2MS+IBA1.0 mg/L is the best medium to induce adventitious roots.
     不定根的诱导以 1 /2MS +IBA 1 .0mg/L生根率达 1 0 0 %,根系发达 .
短句来源
     ratio of root and crown was 4~5;
     ③苗木根系发达,冠根比为4~5。
短句来源
     The results of cutting trial in spring show further that, as compared with the control, the survive rate increases by 42.1%-54.0%, and the average number of roots increases by 92.7%-212.2%.
     春季扦插的成活率比对照高42.1%—54.0%,且根系发达,平均根数较对照多92.7%—212.2%.
短句来源
     In vitro shoots of Eleocharis tuberose were cultured in root introducing medium of 1/2 MS, the emergence of root was even, the root system was well developed and sturdy, the rooting rate was more than 95% and the survival rate of teansplant was about 90%~95%.
     荸荠(Eleocharistuberosa)试管苗在1/2MS诱导生根培养基中,生根整齐,根系发达、粗壮,生根率95%以上,移植炼苗成活率90%~95%。
短句来源
     (4)The plantlets transferred in MS+banana puree 20%+S 2% to help the production of vigorous plant,could be about 5 cm high in 60 d.
     试管苗在MS+香蕉泥20%+蔗糖2%培养基上,大约60d苗快速长高,茎粗壮且根系发达
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  developed root system
These regenerated plants manifested bright green leaves and a well-developed root system.
      
The plants grew vigorously with a well-developed root system and exhibited the trifoliate leaf character of P.
      
Relatively higher E in T plants of clones 1 - 4 was connected most probably with their more developed root system (greater root dry-matter) than in untransformed plants, because no influence of the differences in stornata density on E was found.
      
The well developed root system, the higher PN and dry mass accumulation during the pre-acclimatization phase in aerated vessels induced a better ability to face the transplant stress.
      
The ovary-derived plants with well-developed root system were hardened for 8 days and their survival rate reached over 80%.
      
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  developed roots
Plantlets developed roots on basal medium with Cl3 POP at 1.0 mg L-1 or on auxin-free medium.
      
Radishes irrigated once every 3?days had well-developed roots throughout the crop period, the lowest cracking rate and the least number of radishes of Grade 3.
      
These nodules developed roots from the base of the nodular growth whereas from the upper portion shoots were observed on Y3 basal liquid medium.
      
The percentage of well-developed roots remained low even though all embryos had root meristems.
      
richardiana, after subculturing on B5+1 μM IAA developed roots (up to 30-40%).
      
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  well developed root system
The well developed root system, the higher PN and dry mass accumulation during the pre-acclimatization phase in aerated vessels induced a better ability to face the transplant stress.
      
Cadensa) grown in sand and loam soils and with a well developed root system were exposed to slow soil drying in the late vegetative stage of growth.
      
Regenerated plantlets were difficult to root and it was possible to obtain plants with a well developed root system only after 5-7 weeks of culture on media containing 2iP and IAA both at 0.2 mg l-1.
      
Early development of root systems in seedlings A well developed root system is essential for contending with needle-ice heave.
      


It is an effectual measure to adopt varieties possessing drought resistant characters inarid regions for obtaining favorable vine growth and fair yields.As to drought resistance insweet potato plants,some ecological,morphological and physiological characters against droughtconditions had been studied by direct,indirect and compositive methods.According to experi-mental results,variety“Hua-Pai 117”was considered as the typical drought resistant,whilevariety“52-45”was not.It was found that the difference of rooting...

It is an effectual measure to adopt varieties possessing drought resistant characters inarid regions for obtaining favorable vine growth and fair yields.As to drought resistance insweet potato plants,some ecological,morphological and physiological characters against droughtconditions had been studied by direct,indirect and compositive methods.According to experi-mental results,variety“Hua-Pai 117”was considered as the typical drought resistant,whilevariety“52-45”was not.It was found that the difference of rooting ability and the development of root systembetween both resistant and non-resistant varieties were very distinctive.The rooting abilityand root system of the resistant varieties were earlier and larger than those of othervarieties.Vigorous vine growth and large leaf-area would be employed as criteria for droughtresistance.It would seem that the drought resistant varieties were not so sensible in wantingof soil moisture and consequently would not wilt so quickly as the variety“52-45”do.Thischaracter was closely related to the higher viscosity of the protoplasm and the flourishingbleeding in sweet potato plant.Besides,it appeared that the net assimilation rate,accumulation of carbohydrates andnitrogen compounds of the drought resistant varieties were markedly high as compared withthose varieties which were not resistant to drought conditions.But the respiration rate of bothtypes showed a reverse gradient.

耐旱性强的品种,在干旱条件下能够获得稳定高产的原因,与产量增长速度快有密切关系。植株营养生长迅速、根系发达、伤流量多、原生质粘度大、组织持水力強、在干旱时呼吸较低、净同化率高是品种耐旱的生理基础。根据研究结果并结合甘薯育种特点,提出直接鉴定、间接鉴定、综合鉴定三种方法,适于在育种的不同阶段鉴定品种品系的耐旱性。

The anthers of six varieties and thirty-nine hybrids of O. sativa subsp. Shien were cultured in vitro. The callus has been obtained in five varieties and thirty-five hybrids. Mean frequency of callus induced from anther was 2.18%. Green plantlets or shoots have successfully been obtained in three varieties and eleven hybrids. The present paper reports primarily the role of basic medium and supplemental constituents in callus induced from anther and in differentiation of root and shoot.1. The best medium inducing...

The anthers of six varieties and thirty-nine hybrids of O. sativa subsp. Shien were cultured in vitro. The callus has been obtained in five varieties and thirty-five hybrids. Mean frequency of callus induced from anther was 2.18%. Green plantlets or shoots have successfully been obtained in three varieties and eleven hybrids. The present paper reports primarily the role of basic medium and supplemental constituents in callus induced from anther and in differentiation of root and shoot.1. The best medium inducing callus from anther of rice has been found to be Miller + 2,4-D 2mg/L + yeast extract 1000mg/L + kinet in 1mg/L + indol-zylasetic acid (1AA) 2mg/L + 15% coconut milk. The highest frequency of callus induced was 11-15% and the mean frequency was over 3%.2. We find in this experiment that the medium Miller, MS and Nitsch can make anther callus of rice (O. sativa subsp. Shien) differentiate green plantlet.3. The ratio of kinetin and auxins has major effect upon callus differentiation of rice (Shien) anther. In our experimental condition it appears that the higher the ratio kinetin/auxin is, the higher the differentiation frequency both in the total, the plantlets and green plantlets. But abovementioned regular relationship is not very obviously observed in O. sativa subsp. Keng.4. The Miller's medium plus IAA 2mg/L is very suitable for root formation in plantlet without root. In this medium not only can root be induced but also it is very good for root development. The weak plantlets become fresher because the root has been well developed after it has been inoculated in this medium. If the plantlets have been transferred in this medium and directly planted into the pots afterward, the plantlets may be viable.

对6个籼稻(oryza sativa Subsp.Shien)品种和39个籼×籼杂种的花药在离体条件下进行培养,有5个品种及35个杂种得到了愈伤组织,平均诱导率为2.18%。在3个品种及11个籼×籼杂种中得到了绿苗或绿芽。本文着重报道基本培养基及其附加成分在诱导籼稻花药产生愈伤组织及根芽分化中的作用。 1.试验了几种诱导愈伤组织的培养基,以Miller培养基+2,4—D2毫克/升+酵母浸出液1,000毫克/升+激动素1毫克/升+吲哚乙酸2毫克/升+椰乳15%为最好。诱导率高者可达11—15%,平均诱导率在3%以上。 2.Ms、Nitsch及Miller培养基均可诱导籼稻花药愈伤组织分化出绿色的花粉植株。 3.籼稻花药愈伤组织的分化,随着激动素/生长素比值的增高,绿苗分化率及总分化率均有提高的趋势。而粳稻的这种关系不甚明显。 4.Miller培养基附加2毫克/升的吲哚乙酸对促进具茎、叶而无根的籼稻花粉小植株产生根有很好的作用。在这种培养基上,不仅可以诱导根的发生,而且根系发达,生长较弱的苗转移到这种培养基后,因根系健壮,生势好,转入盆栽,基本可以全部成活。

In order to overcome the interference of polyembryony in cross breeding, and to increase the efficiency in citrus breeding this paper chiefly deals with the technique of separated embryos culture of mature seed.The results indicated that, 1st and 2nd classes large embryos under sand culture, more than 90% of them de-veloped into seedlings. More than 80% of the 3rd and 4th classes small embryos which were cultured on MS medium containing GA3 (Ippm) developed into seed-lings. 52.1% of the 5th and 6th classes small...

In order to overcome the interference of polyembryony in cross breeding, and to increase the efficiency in citrus breeding this paper chiefly deals with the technique of separated embryos culture of mature seed.The results indicated that, 1st and 2nd classes large embryos under sand culture, more than 90% of them de-veloped into seedlings. More than 80% of the 3rd and 4th classes small embryos which were cultured on MS medium containing GA3 (Ippm) developed into seed-lings. 52.1% of the 5th and 6th classes small embryos which were cultured on the same medium described above, developed into seedlings too. Thus, the separated embryo culture provides an effective means for increasing the percentage of citrus hybrids plants.

为了排除柑桔多胚性对杂交育种的干扰,提高育种效率,进行了成熟种子胚的分离培养研究。证明:一、二级大胚采用普通砂培法,成苗率可达90%以上;在含有GA_3(1ppm)的MS培养基上,三、四级小胚成苗率为80%以上,五、六级小胚也有52.1%发育成苗,为提高杂种实生苗的获得率提供了有效途径。 进一步探讨了各种培养基添加物的生理效应,提出以IAA(1ppm)+CH(400ppm)替代GA_3(1ppm)具有更好的效果,培养的小苗生育健壮,根系发达,为入土成活打下了良好的基础。

 
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