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叶角
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  leaf angle
     narrow sense heritability of leaf area was lowest, only 31.69%, but that of leaf angle was high, to 89.83%.
     叶面积的狭义遗传力最低 ,为 3 1 .6 9% ,而叶角较高为 89.83 %。
短句来源
     Booting stage The leaf length was moderate. The leaf angle and loosedegree of Shanyou 63 were smaller, and the sum of loose degree in top 3 leaveswas 7.7 and the leaf area per leaf sheath weight was 0.36 to 0.38 cm2/mg.
     拔节期 叶片的长度适宜,汕优63叶角较小,叶片松散度宜小,顶部3叶松散度之和7.7度左右,叶鞘载叶量0.36~0.38cm~2/mg;
短句来源
     In 1983-1984,the relationship between leaf angle and root distribution was investi-gated in rice cultivated in nutrient solution and soil.
     1983—1984年,通过群体水培、土培试验,在控制水稻根系不同分布空间形状情况下,研究了叶角与根系分布的关系,其结果主要表现如下:1.根系分布较深且多纵向时,叶角较小,叶片趋向于直立;
短句来源
     The diallel crossing test with 1/2P(P+1) crosses paired by 8 sorghum parents was conducted. The leaf length, leaf width, leaf area, leaf angle and leaf direction value of sorghum were analysed genetically according to Diallel Crossing Systems presented by Hayman etc.
     由 8个高粱亲本组成 1 /2P(P +1 )双列杂交试验 ,采用Hayman等人的双列分析法 ,对叶长、叶宽、叶面积、叶角、叶向值进行遗传分析。
短句来源
     Low values of leaf angle and LOV were partially dominant and high values of leaf length and width had superdominance.
     叶角、叶向值以低值为部分显性,叶长、叶面积以高值为超显性。
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  leaf orientation
     With P(P + 1)/2 diallel mating design, crosses were made between 8 inbreds to study genetic parameters of corn leaf length, width, area, angle and leaf orientation value (LOV).
     由8个亲本组成1/2P(P+1)双列杂交试验,采用Hayman等人的双列分析法,对叶长、叶宽、叶面积、叶角、叶向值进行遗传分析。
短句来源
     The co-operation of leaf orientation, photorespiration and thermal dissipation alleviate photoinhibition in young leaves of soybean plants
     叶角、光呼吸和热耗散协同作用减轻大豆幼叶光抑制
短句来源
     Because leaf angle had positive heterosis and leaf orientation value had negative heterosis, the tight plat type sorghum could be obtained by only using the parents with smaller leaf angle and larger leaf orientation value.
     由于F1代叶角为正优势,叶向值为负优势,要获得紧凑型高粱杂交种就必须选择叶角更小、叶向值更大的亲本系。
短句来源
     Changes in leaf orientation in a clear day were stronger than that in a cloudy day especially for triploid clones,suggesting these clones were sensitive to light.
     结果发现 :各无性系的叶角运动在晴天比阴天强烈 ,特别是三倍体无性系最为明显。
短句来源
  “叶角”译为未确定词的双语例句
     loose plant type by thin (SLW=2.5-3 g·cm -2 , dry weight) and curve slant leaves during early growing stage, and compact plant type by thick (SLW=4-5 g·cm -2 ) and erect leaves during middle and late growing stages;
     分蘖盛期叶角较大 ,比叶重SLW 2 .5~ 3g·cm-2 ,叶片薄而披散 ,中后期叶较厚且挺直 ,SLW为 4~ 5g·cm-2 ;
短句来源
     The correalativity between the morphologic character of 9 kinds of wheat variety and resistance to the bird cherry-oat aphid was observed. The results revealed that the resistance of variety to the bird cherry-oat aphid was positively correlative with leaf thorn density and ear density while negitively with the plant height in whole aphid occurrence peiod.
     通过9个小麦品种的株高、旗叶长、旗叶宽、叶角、叶片刺密度、芒长、叶色和穗密度等形态特征与对抗禾谷缢管蚜关系的研究,发现在禾谷缢管蚜整个发生期小麦株高与抗蚜性呈极显著的负相关,叶片刺密度和穗密度与小麦抗蚜性呈显著正相关;
短句来源
     6. Of transgenic TO lines and T] generations, some plants showed morphological aberrations, including dense spike (Ds31-l), yellow leaf (Ds147), slender (Ds9), albino, stripe, early tillering, growth promotion, leaf with big angle.
     6.转基因植株及其后代出现了一些可见的形态突变,包括Ds31-1的穗型突变、Ds147的黄叶子突变、Ds9的细高秆突变以及其他一些突变类型,如白化苗、斑纹状叶片、分蘖早、苗期生长快、叶角大等。
短句来源
     Elucidated the molecular mechanisms of plant-type development will provide the theoretical fundament for rice breeding. Three mutants related to plant-type, i.e. Brush-like panicle2 (Bp2), large leaf angles(lla) and twisted-stem and tiller angle(ts-ta) , were isolated from our T-DNA insertion mutant populations. The morphology , genetic and physiology of three mutants involved were analyzed.
     我们从T-DNA插入水稻突变体库中,筛选到三个与株型相关的突变体:短穗Bulrush-like panicle2(Bp2)、大叶角larger leaf angles(11a)和茎秆螺旋twisted-stem and tiller angle(ts-ta),并对这3个突变体进行了形态学鉴定、遗传分析和初步的生理学研究,克隆了Bp2和11a基因并进行了部分功能研究。
短句来源
     Analytical canopy reflectance (CR) models have reached the level of adequacy that makes it possible to estimate vegetation parameters by the inversion of such models.
     以二向反射辐射信息为基础的植物(作物)冠层反射(CR)模型已经能够以其反演算法推算植物结构参数,例如叶面积指数、叶角分布、叶绿素含量等。
短句来源
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  leaf angle
At a given layer, the influences of diffuse radiation angle distributions and leaf angle distributions on radiation transfer within the canopy are considered.
      
Inheritance of flag-leaf angle, flag-leaf area and flag-leaf area duration in four wheat crosses
      
Flag-leaf angle (FLAngle), flag-leaf area (FLarea) and flag-leaf area duration (FLADuration) are important traits in determining yield in wheat (Triticum aestivum L).
      
QTLs controlling variation in height of the tallest basal tiller, number of basal tillers per basal-tillered plant, panicle length, leaf angle, maturity, and awn length also were mapped.
      
Light interacts with auxin during leaf elongation and leaf angle development in young corn seedlings
      
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  foliage angle
The value of the average foliage angle [I(Z)] at a given depth (Z) from the tip of the stem decreased continually from the upper to lower layers within the canopy.
      
However, the foliage angle distribution in the overall canopy fitted an ellipsoidal area distribution model.
      
The probability of diffuse light penetration through the canopy was calculated using foliage angle and cumulative leaf area parameters.
      
We observed no distinct pattern of foliage angle, and no evidence of decrease in crown construction efficiency with tree size.
      
The distribution of foliage density with foliage angle estimated from inclined point quadrat observations.
      
  leaf orientation
Significance of leaf orientation for leaf temperature in an amazonian sclerophyll vegetation
      
The influence of leaf orientation on leaf temperature has been studied in an sclerophyll vegetation of the Amazon basin, which grows on white sandy soils of very low water retention capacity and variable depth of the water table.
      
Species avoided photo-bleaching primarily by changes in leaf orientation and canopy structure.
      
During June and July when the canopy was normally erect, inducing horizontal leaf orientation reduced net photosynthesis by 50 percent.
      
Leaf orientation (azimuth and angle) and leaf curling were measured seasonally and diurnally on Rhododendron maximum L.
      
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This paper analyses the remote control system of the controllable propeller (CPP)on Beihai 102 Tugboat. The system discussed contains a time-programming unit, three function generators of blade angle, RPM and load a PI circuit, etc.

本文对北海102拖轮变距奖(CPP)遥控系统进行了分析.该系统包括时间一程序单元、桨叶角函数发生器,转速(RPM)函数发生器、负荷函数发生器和比例积分(PI)电路等.

The genetic law of leaf angle in sorghum(Sorghum bicolor(L.)Moench)and correlation between the leaf angle and other characters onsorghum plant type were studied in 1980-1983.The results showed that the heredity of leaf angle in sorghum werecontrolled by at least fours pairs of alleles which belong to the quantitative charactes.The general genetic capacity was between 70 and 90percent and the restricted genetic capacity was over 80 percent.Therewere no significant relationship between the heredity of leaf angle...

The genetic law of leaf angle in sorghum(Sorghum bicolor(L.)Moench)and correlation between the leaf angle and other characters onsorghum plant type were studied in 1980-1983.The results showed that the heredity of leaf angle in sorghum werecontrolled by at least fours pairs of alleles which belong to the quantitative charactes.The general genetic capacity was between 70 and 90percent and the restricted genetic capacity was over 80 percent.Therewere no significant relationship between the heredity of leaf angle and othercharacters of plant type,but the heredity of leaf angle would take placeindependently For the breeding programs on sorghum plant type,the betterresults of selections of leaf angle can be obtained from early progenies.

1980~1983年对高粱叶片角度的遗传传递规律以及叶角与其它株型性状之间的相关性进行了研究,表明叶片角度的遗传最少受4对等位基因控制,属于数量性状,广义遗传力在70~90%之间,狭义遗传力在80%以上。叶角与株型的其它各性状之间无明显相关而独立遗传。在株型育种中,从早代起就进行叶角的选择,可获得良好的效果。

A method is presented which offers a biological base to empirical methods of estimating crop yield from remotely sensed canopy reflectance. This method involves two basic espects, (i) A pattern of leaf area index (LAI), which follows a characteristic trajectory, is provided based on six sets of LAI from plant initiation to maturity from Boerema in Riverna, New South Welse, Australia. There are three varities each for the both of combine sowing and aerial sowing, (ii) A form of daily rate of intercepted photosynthetically...

A method is presented which offers a biological base to empirical methods of estimating crop yield from remotely sensed canopy reflectance. This method involves two basic espects, (i) A pattern of leaf area index (LAI), which follows a characteristic trajectory, is provided based on six sets of LAI from plant initiation to maturity from Boerema in Riverna, New South Welse, Australia. There are three varities each for the both of combine sowing and aerial sowing, (ii) A form of daily rate of intercepted photosynthetically active radiation (PAR), IPARd, as a function of LAI is derived with a simulating calculation based on the radiation transfer equation in a canopy and the measured data of foliage inclination in the field and the conventional data of radiation. The simulated IPARd is tested with the measured points in the field in January. They are fitted very well. If a single value, LAl0, of LAI at the stage closely prior to anthesis is obtained, the values of LAI from then to maturity can be estimated based on the pattern of LAI. The accumulated intercepted PAR, TIRAR, from anthesis to maturity can then be estimated based on the function of IPARd. and estimated sequential LAI over this period. Then rice yield can be estimated from the TIPAR, assuming that all assimilates during this phase are directed towards seed-fillings.The method is used for estimating rice yields on farms. The values of LAlo are derived from the canopy reflectance on images of Landsat -5 on January 21, 1985.

以往,根据遥感资料估算作物产量,多数用的是经验方法。本文提出了一种具有生物学基础的水稻估产模式。该模式包括两项基础性的工作。(1)利用Baerema在澳大利亚新南威尔士州的Riveri-na地区,在水稻整个生长季中获得的三个水稻品种、两种播种方式(空播和拖拉机播)共6组实测的叶面积指数值LAI,通过LAI与积温间关系的分析,得到一条规一化的LAI曲线,称叶面积指数轨线(LAI trajectory)(2)根据太阳辐射在植冠层内的传输理论,利用实测的水稻叶角分布和常规日射资料,用模拟计算的方法,得到水稻冠层对光合有效辐射PAR日截获率IPAR_d与LAI间的关系。并用实测资料对此作了检验,结果表明模拟计算结果是可取的。由此,我们只要知道了水稻扬花前不久某一天的LAI,利用上述两项基本关系及当地的辐射、温度资料,便可推算植冠层从扬花到生理成熟期间对光合有效辐射的截获总量TIPAR,进而再假定水稻的灌浆直接取决于对PAR的总截获量TIPAR,根据水稻籽粒产量与光能截获间的转换效率,便能估算水稻产量。

 
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