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second leaf    
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  二叶
    3.Nipping different plant growth regulators after top pruning has promotion on plant height, stem circumference, the largest leaf area, node distance, root volume, root fresh weight, and area of the second leaf from top, and different plant growth regulators has different promotions, among them BR has the most prominent effect followed by GA3 and NAA, 2,4-D has the least effect.
    3.打顶后夹吸不同的植物生长调节剂对烟草植株的株高、茎围、最大叶面积、节距、根体积、根鲜重、倒二叶叶面积均有促进作用,且不同种植物生长调节剂的促进作用不同,其中以BR的作用最显著,其次是GA3和NAA,2,4-D的作用最小。
短句来源
    1. There are 54 QTLs were detected in the three population for the SPAD value of the flag leaf and the second leaf, distributed on 17 chromosome intervals of 9 chromosomes except for chromosome 5, 9 and 10. A mass of QTLs were detected at the intervals of chromosome 3, 6 and 8, indicated these intervals were important to the genetic basis in SPAD value.
    1.剑叶、倒二叶SPAD值在三个群体中一共检测到了54个QTLs,分布在除5、9和10之外的9条染色体的17个区间上,第3、6、8染色体的部分区间可以同时检测到多个QTL,说明该染色体区段在叶片SPAD值的遗传中具有重要作用。
短句来源
    3, Ganpi No. 2 are higher than other varieties, the synthesis display adaptation are strong, fertility is good; the photosynthesis of second leaf, the Pro content of 9303 are the highest, and respectively reach 7.79μmol·m~(-2)·s~(-1),10.65%,8.83%.
    9303、甘啤4号、甘啤3号、甘啤2号品的旗叶、倒二叶光合速率,可溶性糖含量,脯胺酸含量等较其它品种高,综合表现出适应性强,丰产性好,其中啤酒大麦品种9303倒二叶光合速率和脯胺酸含量最高,分别为7.79μmol·m~(-2)·s~(-1),10.65%,8.83%。
短句来源
    But the photosynthesis of flag leaf, second leaf,the Pro content of Aspen are the lowest in several varieties, and respectively reach 9.37μmol·m~(-2)·s~(-1)、6.42μmol·m~(-2)·s~(-1)、4.5%, Aspen is the quite sensitive to moisture content lacks, and the adaptation of drought resistance was bad.
    而Aspen旗叶、倒二叶光合速率,脯胺酸含量在几个品种中最低,分别为9.37μmol·m~(-2)·s~(-1)、6.42μmol·m~(-2)·s~(-1)、4.5%,对水分亏缺比较敏感,抗旱适应性较差。
短句来源
    The single leaf WUE was studied,the result showed that the second leaf from topis thehighest in all leaf layers,9:00一11:00 is the highest in a day.
    研究单叶水分利用效率表明:顶层第二叶在各叶层中最高; 其日变化是9:00-11:00时单叶WUE最高。
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  2叶
    2. Sensitive period for fertility transfer of the Xiangnuoliang 2S ranged from pollen mother cell differentiation to meiosis, morphylogically the stage when the leaf ring of the flag leaf is 0.8cm higher then that of the second leaf from the bottom, i.e., 4-10 days(in autumn) or 3-7 days(insummer) before heading.
    2.“湘糯粱2S”育性转换的温光敏感时期为花粉母细胞形成至减数分裂期,其外形判断为旗叶叶环高出倒2叶叶环0-8厘米,即抽穗前4-10天(秋季)或3-7天(夏季)。
短句来源
    The ideal length of the second leaf under the top leaf is 39-44 cm for the early crop and 37-43 cm for the late crop.
    顶下2叶长:早季39~44cm、晚季37~43cm;
短句来源
    Theideal width of the second leaf under the top leaf is 1.1-1.4 cm for the early crop and about 1.1 cm for the late crop.
    顶下2叶宽:早季1.1~1.4cm、晚季1.1cm左右;
短句来源
    The (results) showed that the change trend of Pn and Tr were (consistent), and the order was flag leaf (FL), the second leaf (Cd2L), the third leaf (Cd3L) and the fourth (Cd4L) leaf from big to small.
    结果表明,小麦叶片的Pn和Tr在花后的变化趋势表现一致,且其大小顺序为旗叶(FL)、倒2叶(Cd2L)、倒3叶(Cd3L)、倒4叶(Cd4L)。
短句来源
    A QTL in marker interval R2510-RM211 on chromosome 2 affected both grain weight per panicle and the second leaf weight, which would be beneficial to super-high-yielding rice improvement.
    第2染色体的R2510-RM211标记区间同时检测到控制单穗重和倒2叶重的QTL,该QTL对超级稻株型育种具有应用价值。
短句来源
  倒2叶
    2. Sensitive period for fertility transfer of the Xiangnuoliang 2S ranged from pollen mother cell differentiation to meiosis, morphylogically the stage when the leaf ring of the flag leaf is 0.8cm higher then that of the second leaf from the bottom, i.e., 4-10 days(in autumn) or 3-7 days(insummer) before heading.
    2.“湘糯粱2S”育性转换的温光敏感时期为花粉母细胞形成至减数分裂期,其外形判断为旗叶叶环高出倒2叶叶环0-8厘米,即抽穗前4-10天(秋季)或3-7天(夏季)。
短句来源
    The (results) showed that the change trend of Pn and Tr were (consistent), and the order was flag leaf (FL), the second leaf (Cd2L), the third leaf (Cd3L) and the fourth (Cd4L) leaf from big to small.
    结果表明,小麦叶片的Pn和Tr在花后的变化趋势表现一致,且其大小顺序为旗叶(FL)、倒2叶(Cd2L)、倒3叶(Cd3L)、倒4叶(Cd4L)。
短句来源
    A QTL in marker interval R2510-RM211 on chromosome 2 affected both grain weight per panicle and the second leaf weight, which would be beneficial to super-high-yielding rice improvement.
    第2染色体的R2510-RM211标记区间同时检测到控制单穗重和倒2叶重的QTL,该QTL对超级稻株型育种具有应用价值。
短句来源
    Two major QTLs for the second leaf angle were locatedon chromosome 5 and chromosome 6 respectively.
    倒2叶基角两年同时在第5和第6染色体上各检测到1个主效QTL。
短句来源
    The awn-cutting and leaf-cutting experiments made from i9'82 to 1987 have shown that effects of all the photosynthetic organs on yield were. awn> flag leaf> the second leaf from the top> the third leaf f^om the top.
    1982~1987年剪芒、剪叶试验结果表明,大麦诸光合器官对产量的作用表现为:芒>旗叶>倒2叶>倒3叶。
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  second leaf
The work presented deals with the fact that continuous or periodic distribution of low irradiance significantly reduces the dry weight of coleoptile and second leaf with cell elongation in rice seedlings during the initial period of growth.
      
Combined pathogen infection involved the inoculation of one leaf with Pst DC 3000 and of a second leaf, from the same plant, with Pstb.
      
L-Canavanine inhibited elongation of the second leaf sheath of rice seedlings more than other natural bioactive substances, such as salicylic acid and cinnamic acid.
      
The first leaf had only about 10% and the second leaf only 20% of the area of the fifth leaf.
      
The first leaf layer above a point was defined to be the highest aggregation of the foliage above the point, and the second leaf layer to be the one below.
      
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Variations of the distribution of assimilation products of wheat varieties of different plant hights were studied with isotopes ~(14)c and ~(32)p during late stages of development. The causes of poor filling of grains and generally early senescence of dwarf varieties were discussed. Results show that the rate of distribution of radiant products in the seeds is increased obviously from the flowering stage to the time of muture. The average rate of 11 varieties is changed from 32.5% to 77.80%. Conversely, those...

Variations of the distribution of assimilation products of wheat varieties of different plant hights were studied with isotopes ~(14)c and ~(32)p during late stages of development. The causes of poor filling of grains and generally early senescence of dwarf varieties were discussed. Results show that the rate of distribution of radiant products in the seeds is increased obviously from the flowering stage to the time of muture. The average rate of 11 varieties is changed from 32.5% to 77.80%. Conversely, those of the stem-sheath are decreased heavily. There is existing a division of labor of distributing of the products up and down between the flag-leaf and the second leaf from top, 70-80% of the assimilation products of flag leaves are transported to the heads and the rest to the upper stem-sheeth-leaves. while within the second leaf from the top, 50% of the assimilation products are transported to the middle and 25% to the lowers part of the plant, with only 25% to the head approximately. The contributions functional organs of dwarf varieties is no less important than the tall varieties. The assimilation products of dwarf varieties is higher about 30% than tall ones, but at the sametime, its distribution to stem-sheath decreased about 30%. Thus, it is a disadvantage to the metabolism activeties of vegetative organs of middle and lower portions. As a result, dwarf varieties tend to turn green-withered and early senescence. The rate of transportation of dry matter from stem-sheath to heads of the dwarf is about half of the mid and tall varieties.

本试验利用放射性核素~(14)C及~(32)P研究了小麦不同秆高品种,在生育后期同化物质的运转与分配的差异,对矮秆品种灌浆不良、易青枯早衰的原因进行了探讨。试验结果表明,从灌浆初期至成熟,籽粒中放射性产物分配率迅速增加,11个品种平均,由32.5%增至77.8%,茎鞘各层则大幅度降低。此时的功能器官旗叶与倒二叶,存在着输送方向上的分工,旗叶同化产物70—80%运往穗部,其余运往植株上部茎鞘叶,而倒二叶却有50%同化产物供应植株上部及中部茎鞘叶,其余供应下部茎鞘叶及穗,约各占25%左右。生育后期茎鞘中贮存性干物质,亦呈现着向穗部的再输出,约占籽粒干重增长量的30—50%,不同品种间输出率有较大差异,变幅20—80%。矮秆品种功能器官的作用并不逊于高秆品种,其倒二叶同化物质对穗的贡献较高秆品种为高,但同时向茎鞘的分配率降低了30%,因而不利于维持生育后期植株中下部营养器官的代谢与功能,表现了矮秆品种易青枯早衰、茎鞘干物质向穗部的输出率仅为高秆品种的一半左右。

Some studies on the isozymes of peroxidase,polyphenol oxidase,esterase and theactivities of peroxidase,polyphenol oxidase in six parts(including one bud and fiveleaves)of growing tea shoot in autumn season were conducted.The results are asfollows:15 bands of peroxidase,6 bands of polyphenol oxidase,and 9 bands of esterasewere detected.There were three kinds of peroxidase isozymograms,two kinds ofpolyphenol oxidase isozymograms and the esterase isozymogram showed no differenceamong the bud and leaves.The band...

Some studies on the isozymes of peroxidase,polyphenol oxidase,esterase and theactivities of peroxidase,polyphenol oxidase in six parts(including one bud and fiveleaves)of growing tea shoot in autumn season were conducted.The results are asfollows:15 bands of peroxidase,6 bands of polyphenol oxidase,and 9 bands of esterasewere detected.There were three kinds of peroxidase isozymograms,two kinds ofpolyphenol oxidase isozymograms and the esterase isozymogram showed no differenceamong the bud and leaves.The band PX_2 of peroxidase was found as the marker bandin the first leaf to the fourth leaf.The sum activity of peroxidase and it's band PX_(13)increased as the organ changedfrom bud to the fifth leaf and the activity of band PX_(15)showed two highest peaks inthe second leaf and the fifth leaf.The activities of polyphenol oxidase in bud and thethird leaf were lower than those in other leaves.The bands in the polyphenol oxidaseisozymogram showing difference in activity among the bud and leaves were PL_1,PL_3and PL_8.In the isozymogram of esterase the activities of bands ES_(13)ES_(14)significantlydecreased as the organsochanged from bud to the fifth leaf,showing opposite to thatof peroxidase.These results indicated that the peroxidase isozymograms,polyphenol oxidasewere correlative with the development of tea shoot.And some active bands such asPX_2,PX_(13),PX_(15),PL_1,PL_3,PL_8,ES_(13),ES_(14)of the three kinds of the enzymesindecated there were differences in organs in metabolize and ageing of the leavse of teashoot.

秋梢从芽到第五叶,表现出3种酶谱共有15条过氧化物酶同工酶带表达。酶带PX2为1至4叶的特异性酶带,PX13带的活性及总活性,随新梢的老化而递增。PX15带的活性在2和4叶中出现两个最高峰值。芽的过氧化物酶活性,与各叶片比较,均达极显著水平。多酚氧化酶在芽叶中表达出6条酶带、两种酶谱。多酚氧化酶活性以芽和第三叶最低,而芽又比各叶片显著地低。在各部位间活性变化较大的酶带有 PL1、PL3、PL6等。秋梢中的酯酶同工酶谱共有9条酶带,各部位的酶谱均相同。但是酶带 ES13、ES14的活性表现出随叶片老化而递减的趋势。这些结果表明:过氧化物酶、多酚氧化酶的同工酶谱,与茶树新梢的发育有联系,其中的一些酶带,如 PX2、PX13、PX15、PL1、PL3、PL6以及酯酶中的 ES13、ES14等,与茶树新梢的发育存在着密切的相关性,且能反映出新梢各部位间的代谢差异及老化程度。

The test for measuring feed consumption were carried out in Changsha in 1981with varieties "Xiang-ai-zao 9" (first season) and "Dong-ting-wan-xian" (secondeason). The temperate during the test period was 26-30℃ and 18-22℃ respectively.The results obtained indicated that the average leaf area loss per folder larva was20.38Cm~2(first season) and 22.68cm~2(second season), of it 19.6-21.6% was fedby instar IV, 69.6-71.7% by instar V. Simulated defoliation was conducted in rice fields of Chang-de county in 1982.Leaves...

The test for measuring feed consumption were carried out in Changsha in 1981with varieties "Xiang-ai-zao 9" (first season) and "Dong-ting-wan-xian" (secondeason). The temperate during the test period was 26-30℃ and 18-22℃ respectively.The results obtained indicated that the average leaf area loss per folder larva was20.38Cm~2(first season) and 22.68cm~2(second season), of it 19.6-21.6% was fedby instar IV, 69.6-71.7% by instar V. Simulated defoliation was conducted in rice fields of Chang-de county in 1982.Leaves clipped were flag(reverse first leaf), reverse second leaf and reverse thirdleaf Clipped leaf areas were 0, 6, 10, 15cm~2.This test was repeated four times on84 plots, including the checks, with 4 hills in each plot. The regression equation of yeild loss (Y) and clipped leaf area (X) wasY=-1.341+0.616X(r=0.85). If Y was 2% (economic injury level), X (leaf arealoss per plant) would be 5.424cm~2, which would be equal to the leaf area loss by80,000 larvae per mu. The difference between the results of this test and that of field inoculation testshas been discussed.

本研究分别用“湘矮早9号”(早稻)及“洞庭晚籼”(晚稻)孕穗期叶片饲养稻纵卷叶螟幼虫,饲养期间温度分别为26-30℃及18-22℃,结果平均每虫食叶面积分别为20.38cm~2及22.68cm~2。幼虫食量增长规律类同“Dyar氏法则”,其中四龄食量约占20%,五龄约占70%。1982年在常德县湖区进行人工模拟试验,品种“湘矮早9号”,每亩施纯氮12.5公斤,剪叶叶位为剑叶(倒一叶)、倒二叶、倒三叶、剪叶面积为0、9、10、15cm~2四个级别。结果剪叶面积(X)与减产率(Y)的关系式为:Y=-1.34'+0.616X(r=0.85),当Y为2%时(经济允许水平),则X为5.7270cm~2,相当于每亩81,355头幼虫的取食量。所得结果与人工接虫试验基本一致,本文并讨论了产生差异的原因。

 
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