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diameter of disc
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  盘径
     The genetic analysis of main agronomic characters was conducted with 10 varieties of oil sunflower (Helianthus annuus L.) . The results showed that direct selection can be carried out at early generation for characters with higher heritability such as plant hieght, grain number per plant, 100-grain weight, diameter of disc and grain weight per plant.
     对10个油用向日葵品种的主要农艺性状进行遗传分析的结果表明,株高、单株粒数、百粒重、盘径和单株粒重等农艺性状具有较大的遗传率,可以在早代单株选择或直接选择;
短句来源
     With the increase of the density, the diameter of disc, the number of seed per disc, thousand kemel weight and the yield of per disc decreased.
     随着密度增大,油葵盘径变小,每盘粒数和千粒重降低,单盘产量降低。
短句来源
  相似匹配句对
     Advantages of tunneling by TBM with large diameter disc cutter
     TBM采用大直径滚刀掘进的优越性
短句来源
     The Applications and Design of Pin Tooth Transmission on the Big Diameter Disc
     销齿传动在大直径圆盘上的应用与设计
短句来源
     and the fruit diameter, T.
     果实直径、T.
短句来源
     while the mixing efficiency was reduced along with the increasing of disc diameter.
     釜径增大,混合效率降低。
短句来源
     disc ventilation;
     制动盘通风散热性能研究;
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This Paper has mainly Searched for the influence upon operating quality and acting force by the geometric parameters that consists of curved surface of star-shape discs and Curve of sfar-tooth edge (diameter of disc, radius of curvature, Curve edge shape, and deflection angle etc)。Through orthogonal contrast design as well as measurement of six-component forces, the optimum proposal in the star shaped disc parameters is obtained and the data for dcsigning of paddy field harrow and calculation of...

This Paper has mainly Searched for the influence upon operating quality and acting force by the geometric parameters that consists of curved surface of star-shape discs and Curve of sfar-tooth edge (diameter of disc, radius of curvature, Curve edge shape, and deflection angle etc)。Through orthogonal contrast design as well as measurement of six-component forces, the optimum proposal in the star shaped disc parameters is obtained and the data for dcsigning of paddy field harrow and calculation of strength are provided。

本文主要探讨构成星形耙片的曲面和星齿刃口曲线的几何参数(耙片直径、曲率半径、刃口曲线形状、偏角等)对作业质量及作用力的影响。并通过年交设计试验及六分力测定,找到星形耙片参数最优组合方案,为水田耙的设计和强度计算提供参考数据。

Pelodiscus parviformis nov. sp. (Fig.1) Body small and almost disc,the diameter of disc about 100-120 mm;dark olive-greyish above,the disk with the traces of costal symphyses,dorsal tubercles more or less fused with one another in longitudinal series;plastron uniform became light-red when captured about one minut later;four callosities,hyo-hypoplastral and xiphiplastral,feebly developed in the adult;the tail,whether male's or female's overlying posterior margin,and male's longer than female's. Proboscis...

Pelodiscus parviformis nov. sp. (Fig.1) Body small and almost disc,the diameter of disc about 100-120 mm;dark olive-greyish above,the disk with the traces of costal symphyses,dorsal tubercles more or less fused with one another in longitudinal series;plastron uniform became light-red when captured about one minut later;four callosities,hyo-hypoplastral and xiphiplastral,feebly developed in the adult;the tail,whether male's or female's overlying posterior margin,and male's longer than female's. Proboscis longer than the eye-opening. Skull. Snout pointed and a little longer than the diameter of the orbit;postorbital arch far narrower than the diameter of the orbit;frontal and parietal humped;middle part of alveolar surfaces of upper jaw seperated broadly,the distance of narrowest point almost equal to broadth of alveolar surfaces;the broadth ratio of the narrowest point to the broadest one of basisphenoid more than 1/2 (Fig. 2). A single neural plate between the first pair of costals;costal plates well developed,the last pair in contact in the mid-line;all the plates of the carapace finely pitted and vermiculated;anterior limbs of epiplastra little longer than posterior ones;epiplastrons seperated from one another;the limbs of entoplastron formed the angle of 135° ;hinder extremities of entoplastron moderatedly broad. The diameter of egg about 13-14 mm,white,ball. Range. Quanzhou,Xing’an,Guanyang,Ziyuan,Lingchuan counties of Guangxi Auto. Region;Dong’an,Qiyang,Daoxian counties of Hunan Province. In Quanzhou and Xing’an region it was common,inhabiting river only with sand beach. It was frequently sold in the markets for food before 1990 ’s,but it is rare now so that must be protected from captured in time.

本文报道了1个产自桂东北及邻近地区的鳖类新种——小鳖(Pelodiscusparviformis)。该鳖种生活在水质清洁,砂砾石底质的江段,60年代以前出产额丰,现已难觅踪影。对野生小鳖资源的保护已迫在眉睫

The genetic analysis of main agronomic characters was conducted with 10 varieties of oil sunflower (Helianthus annuus L.). The results showed that direct selection can be carried out at early generation for characters with higher heritability such as plant hieght, grain number per plant, 100-grain weight, diameter of disc and grain weight per plant. For maturity and percentage of shell with lower heritability, indirect selection correlated with other characters or late generation selection can...

The genetic analysis of main agronomic characters was conducted with 10 varieties of oil sunflower (Helianthus annuus L.). The results showed that direct selection can be carried out at early generation for characters with higher heritability such as plant hieght, grain number per plant, 100-grain weight, diameter of disc and grain weight per plant. For maturity and percentage of shell with lower heritability, indirect selection correlated with other characters or late generation selection can be utilized. The characters showing wide genetic variation were those as percentage of shell, grain number per plant, grain yield per plot and grain weight. Since the successful improvement of a character mainly depends on its heritability, variation of heritability and intensity of selection, we suggest that the characters which may give better genetic improvement are grain number and grain weight per plant under condition of 5% selection pressure.

对10个油用向日葵品种的主要农艺性状进行遗传分析的结果表明,株高、单株粒数、百粒重、盘径和单株粒重等农艺性状具有较大的遗传率,可以在早代单株选择或直接选择;出苗-现蕾、现蕾-开花、开花-成熟、皮壳率等性状的遗传率较低,应根据各性状间相关关系进行间接选择或将选择推迟到晚期世代进行。遗传变异幅度较大的性状有皮壳率、单株粒数、小区产量、单株粒重等。由于性状的遗传改良效果主要由该性状的遗传率和变异幅度及选择强度所决定,因此,在选择率确定为5%情况下,遗传改良效果较好的性状为单株粒数和单株粒重。

 
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