助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   cotton 在 农作物 分类中 的翻译结果: 查询用时:0.029秒
图标索引 在分类学科中查询
所有学科
农作物
植物保护
轻工业手工业
农业基础科学
农业工程
生物学
农业经济
农艺学
气象学
更多类别查询

图标索引 历史查询
 

cotton
相关语句
  棉花
    Study on the interactions between exogenous Bt-ICP and cotton secondary metabolites as well as induced resistance in Bt transgenic cotton
    外源Bt杀虫蛋白与棉花抗虫次生物的互作关系及转Bt基因棉花诱导抗虫性的研究
短句来源
    Studies on Genetic Basis of Heterosis for Yield in Upland Cotton
    棉花产量性状杂种优势的遗传基础研究
短句来源
    Study on Cotton Reproductive Organ Development Related Genes and Their Expression Pattern
    棉花生殖器官发育相关基因的克隆与表达研究
短句来源
    Genetic Study on Jin A Cytoplasmic Male Sterile Line in Cotton (Gossypium)
    棉花晋A细胞质雄性不育系的遗传研究
短句来源
    A Process-Based Simulation Model for Cotton Growth and Development
    基于过程的棉花生长发育模拟模型
短句来源
更多       
  
    The Expression and Inheritance Stability of Bt Insecticidal Gene in Transgenic Insect-resistant Cotton Plants
    Bt杀虫基因在转基因抗虫中的表达与遗传稳定性的研究
短句来源
    Effects and Mechanisms of the Transgenic Cry1Ac Plus CpTI (Cowpea Trypsin Inhibitor) Cotton on Insect Communities
    转双价基因(Cry1Ac+CpTI)对昆虫群落的影响及其作用机制
短句来源
    Studies on the Biosafety of Transgenic Insecticidal Cotton (Gossypium Hirsutum L.) to Itself and Soil Ecology
    转基因抗虫(Gossypium hirsutum L.)生产安全性的研究
短句来源
    Genetic Evaluation and Utilization of Transgenic Bt and Bt+CpTI Cotton (Gossypium hirsutum L.) Lines
    转Bt基因和Bt+CpTI基因抗虫的遗传评价及利用研究
短句来源
    Genetic Effects of Bt and Its Mapping in Transgenic Cotton
    转基因抗虫Bt基因的遗传效应与定位研究
短句来源
更多       
  “cotton”译为未确定词的双语例句
    Eco-Study and Simulation of Boll Development and Fiber Quality Formation in Cotton
    棉铃发育及纤维品质形成的生态效应与模拟研究
短句来源
    Studies on Compositive Factors and Genetic Characters of Fiber Quality of Transgenic Insect-Resistant Hybrid Cotton
    转基因抗虫杂交棉纤维品质性状的构成因素和遗传特性的研究
短句来源
    HORMONAL CONTROL OF BOLL SHEDDING IN COTTON PLANT
    棉铃脱落的激素控制
短句来源
    HERITABILITY AND DEGREE OF DOMINANCE OF FIBER QUALITY CHARACTERS OF UPLAND COTTON (A SUMMARY OF 1980 - 1985 ESTIMATIONS)
    陆地棉纤维品质性状的遗传力和显性度——1980—1985年估测结果综述
短句来源
    The Mean Spiral Angle Measurement of Cotton Fibre Secondary Walls by X-Ray Diffraction
    用X射线衍射法测定棉纤维次生胞壁的平均螺旋角
短句来源
更多       
查询“cotton”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  cotton
Enzymatic hydrolysis of neutral fat of cotton oil soap stock with a nonspecific lipase produced byOospora lactis F-500 was designed.
      
Utilization of cotton oil soap stock as the only source of carbon during cultivation of the fungus was studied.
      
The rate of hydrolysis of soap stock fat strongly depended on the way of biological conversion of cotton oil soap stock.
      
The resulting mixed cultures utilized cellulose, cellobiose, glucose, maize residue, cotton, and flax boon producing ethanol (up to 0.9 g/l) and acetic acid (up to 0.8 g/l).
      
Use of the Fungus Panus tigrinus in the Manufacture of Pressed Materials from Cotton Plant Waste
      
更多          


The scientific application of an ideal rotation system on paddy fields,has now been considered as a very important problem for ensuring highergrain yields and promoting soil fertility.As the commencing work onrotation researches,authors had selected to study the Rice-Cotton rotationsystem in Yuyao,Chekiang Province.A series of investigations and ex-periments were conducted in the year of 1955,in order to realize thevariations of soil chemical properties and rice growth on those rotatedpaddy fields.The...

The scientific application of an ideal rotation system on paddy fields,has now been considered as a very important problem for ensuring highergrain yields and promoting soil fertility.As the commencing work onrotation researches,authors had selected to study the Rice-Cotton rotationsystem in Yuyao,Chekiang Province.A series of investigations and ex-periments were conducted in the year of 1955,in order to realize thevariations of soil chemical properties and rice growth on those rotatedpaddy fields.The results obtained are summerized as follows:(1)During the period of Cotton rotation in paddy fields,the organiccontents in the soil tend to decrease,while the total exchangeable bases andavailable phosphorus show an apparant increase.By cultivating rice in suchfields,a reversible tendency appears,namely manifesting an increase ofsoil organic matter content and a decrease of both total exchangeable basesand available phosphorus contents.Besides,the formation of more am-monical nitrogen is found in the later case.(2)The Rice-Cotton rotation will assuredly increase the rate of ricegrowth as well as the yields of grains.Comparing with the unrotatedplot,paddy fields so rotated show an average increase of 9% in grainyeilds,as confirmed by field experiments.(3)In those rotated paddy fields,winter crop-green manure(Medicagodenticulata wild)grew vigorously and showed an increase of 70% in yields(based on fresh weight)as compared with unrotated paddy fields.(4)Rice-Cotton rotation may adjust the rate of the alternation of ac-cumulating and decomposing of soil organic matter,which we know willmarkedly promote soil fertility in paddy fields.Therefore,to save the ap-plication of manure and solve the shortage of fertilizers in grain produc-tion,the use of Rice-Cotton rotation system in certain district,is ofparamount importance at present time.

(1)稻田轮种棉花期间,土壤有机质含量有减低的趋势,但土壤代换性盐基总量及速效磷的合量均增高。轮种水稻期间,土壤有机质又有增加的趋向,而代换性盐基总量及速效磷则渐次减低。此外,土壤中铵态氮则有增多的趋势。(2)稻棉轮种能增强水稻的生长势,提高水稻的产量。根据对比试验及统计资料,一般比连种区增产9%左右。(3)稻田轮种棉花后,冬作绿肥生长良好, 鲜草产量比一般连种稻田增加70%以上。(4)在保证增产的前提下,轮种区的水稻基肥用量,一般可比连作稻区节省40%左右,而轮种区的绿肥产量又能增加,因此可自轮种田内割出60%的绿肥鲜草,作为其他稻田的基肥,而达到全面增产的目的,这在目前肥料普遍不足的情况下有其重要意义。

(The Kiangsu Affiliated Academy of the Chinese,Academy of Agricultural Sciences)Hybrid vigour in cotton has been reported by a number of workers.Most of them dealtwith interspecific hybrids.They were mostly marked with an increase in plant growth,especially in the F_1 crosses of American Upland × Sea-island and American Upland × Egyptiancotton.In order to study the possibility of producing an extra long fibre cotton in the Yang-tze basin and the Hwangho Plain by making use of hybrid vigour,the following...

(The Kiangsu Affiliated Academy of the Chinese,Academy of Agricultural Sciences)Hybrid vigour in cotton has been reported by a number of workers.Most of them dealtwith interspecific hybrids.They were mostly marked with an increase in plant growth,especially in the F_1 crosses of American Upland × Sea-island and American Upland × Egyptiancotton.In order to study the possibility of producing an extra long fibre cotton in the Yang-tze basin and the Hwangho Plain by making use of hybrid vigour,the following problemswere investigated at Nanking,Kiangsu during 1959-1962.(1)Combining ability between different interspecific crosses with special reference toyield,earliness and fibre qualities.(2)Morphological and physiological characters of economic importance in F_1 hybrids.(3)Performance of promising hybrids in field production.(4)Method of producing hybrid seeds with cheaper cost and less labour.Fifty-nine combinations were studied from 1960 to 1962,among which Pong-zai No.1(Upland cotton)×L.S.4923(Sea-island)was the best in yield and earliness.The averageyield of this F_1 hybrid in three years with 178 kg.of seed cotton or 53.7 kg.of lint cotton permow.As compared with the parents it was 94.35% of seed cotton or 82.2% of lint cotton ofthe yield of Delta-upland cotton and 187.17% of seed cotton or 172.74% of lint cotton of theyield of Sea-island L.S.4923.The fibre quality of F_1 hybrids approached Sea-island parent with a mean fibre length of40 m.m.,mean fibre fineness of 7000 meters per gram wt.,and single fibre strength of 4.5g.The methods and procedures for producing commercial hybrid cotton seed were as follows:(1)Hybrid F_0's seed was produced by hand emasculation and pollination which was ofvalue in areas abundant with hand-labor or adapted to transplanting for saving seeds up to4/5.(2)The female parent with recessive markers,was pollinated by hand without emascula-tion.In the thinning of the hybrid progeny all recessive plants were removed,leaving onlythe true F_1's.The recessive characters used for markers were virescent yellow foliage,redstem and hairy petiole of the seedling.The percentage of hybrid seed setting for differentupland cotton varieties ranged from 13% to 78%.Observations on heterosis in the characters of F_1 hybrids of G.hirsutum×G.barbadensewere summarized as follows:Plant Characters Comparison of bybrid with Upland and Seaisland parentsDays from planting to seedling Earlier than either parentDays from budding to flowering Intermediate nearer to earlier UplandDays from seedling to boll maturity Intermediate nearer to late Sea-island Days of bud development Intermediate nearer to earlier UplandDays of boll development Longer than Sea-islandDays from seedling to first boll maturity IntermediatePlant height Taller than either parentNumber of monopodia Less than either parent,but approaching Up landNumber of sympodia More than either parentNumber of fruiting points per plant More than either parentPosition of main stem nodes where first fruiting branch appears Lower than either parentInternode length of axis Longer than either parentInternode length of fruiting branch Longer than either parentPetiole length Longer than either parentLeaf area Larger than either parentLeaf lobe index Intermediate,approaching Sea-islandShedding percentage IntermediateDistribution of bolls in different parts of the plant Approaching Sea-island,most bolls setting at middle and upper parts of the plantWeight of seed cotton per boll IntermediateNumber of ovules per boll Approaching Sea-island in a lower numberMotes percentage More than either parentPistil length IntermediateCorolla area and index Larger than either parentSeed index Larger than either parentLint index IntermediateMaturity Intermediate,approaching late Sea-islandFibre length Longer than either parentFibre fineness Approaching Sea-islandYield in seed cotton Approaching Upland,higher than Sea-islandYield in lint cotton Lower than Upland,higher than Sea-islandProduction of dry matter More than either parentProduction of dry matter per square meter of leaf area More

1959—1962年试验证明,海陆杂种一代具有早熟、丰产、优质的特性。海陆杂种一代的籽棉产量接近陆地棉,而显著高于海岛棉。成熟期较海岛棉早,比陆地棉偏迟。生育特性一般介于两亲之间,不同程度的偏向于海岛棉,有的特性超过两亲范围以外。纤维细长,强度高,可以制成高挡纺织品。在江苏各地示范试种结果良好。在制种技术方面研究证明,采用具有某一隐性指示性状,进行不去雄杂交(人工辅助授粉),杂交率达70%,每工作日可制种6—8斤。

This paper deals with the genetic behaviour and breeding practice of the interspecific hybridsbetween G.hirsutum and G.arboreum obtained in 1944 and 1952.The main results are pre-sented as follows:1.The pollen grains of the Asiatic cotton germinate slowly on the stigma of the Uplandcotton.The growth of pollen tubes is slow and their female and male gametes are incom-patible at fertilization.Generally only a few ovules were fertilized within a boll.Owing tothe fact that the production of the nutritive substances...

This paper deals with the genetic behaviour and breeding practice of the interspecific hybridsbetween G.hirsutum and G.arboreum obtained in 1944 and 1952.The main results are pre-sented as follows:1.The pollen grains of the Asiatic cotton germinate slowly on the stigma of the Uplandcotton.The growth of pollen tubes is slow and their female and male gametes are incom-patible at fertilization.Generally only a few ovules were fertilized within a boll.Owing tothe fact that the production of the nutritive substances was inadequate to meet with the re-quirement of the normal development of the boll,it is difficult to obtain hybrids.In orderto promote the boll setting,pollinated maternal pollen grains ware applied on the stigmatawhich had been pollinated with paternal pollen grains several hours before.In this way,wegot the interspecific hybrids. 2.The interspecifie hybrids between these two species are physiologically abnormal.Thehybrids are highly sterile,either by selfing or by back crossing.The pollen grains of theUpland or Asiatic cotton may germinate on the stigma of the F_1 hybrids and the growing rateof their pollen tubes is also normal.Abnormality of the ovules may be the main cause forabortion.Most of the hybrid ovules have no embryo sacs.Occasionally a few ovules fertilized,but aborted during the development of embryoes.The chromosome number of the pollen mothercells of the F_1 hybrid,in general,is 39,or occasionally 52.The chromosome behaviour isirregular in meiosis,forming not only quartets,but also micronuclei.The percentage ofapparently well developed pollen grains is only 7.1% most of which are inviable too.The back-crosses either with the Upland or the Asiatic cotton as recurrent parent with F_1 hybrids aspollen parents are also with difficulty,because their pollen grains are highly abortive.3.The suitable concentration of sucrose in agar medium for artificial germination ofcotton pollen grains varies with cotton species:G.arboreum,34-35%,the Upland cotton,37-40%,and the Sea Island cotton,37-39%.4.By treating the mixed solution of 38% sucrose and a small amount of vitamin B1 onthe stigma of the F1 hybrid,the fertilization and development of the ovules may be promoted.The formation of the abcission layer of the stalk may be inhibited by the treatment of 5 p.p.m.2, 4-D linolin paste.By using the forementioned treatments,the fruiting percentage of theF_1 hybrids backcrossed with the Upland cotton rise up to 4.19%,even though there is only afew bolls with one mature seed,quite a number of them are seedless.Alternatively,by meansof repeated pollination,the fruiting percentage was 0.19%,and seeds are obtained.By usingG.arboreum L.as recurrent parent in backcrosses with the F_1 hybrids,the fruiting percentagerises up to 9.16%,but no seed has ever been obtained.5.For the purpose of improving the lint length and Ginning percentage,it is importantto choose the recurrent parent in the backcross with the F_1 hybrid.It may be ineffective forincreasing the number of backcrosses.6.The range of segregation of the lint length and ginning percentage of the backcrossprogeny,is wider in using F_1 hybrids as female parent than as males.Thus,it should beconcerned for selection of higher lint length and gining percentage.7.In the progeny of the interspecific hybrid of 1944 Combination,individual plants withgood economic characters were observed,such as lint length 41.3 mm.,ginning percentage 41.9%,hairiness,disease resistant,and early maturity,etc.By applying repeated selection of in-dividual plant,four desirable new strains were obtained:“Long Fibre No. 2,”“NankingCotton No.25,”“1003-7,”and “5161-2.”The characteristics of the “Long Fibre No.2”areearly maturity,long lint,single boll weight 5.28g.,fibre length 36 mm.,ginning percentage 31%,lint index 5.22g.,seed index 11.48g..The corresponding characters of the other varieties are:“Nanking Cotton No.25”:5.54g.,30-32 mm.,37-39%, 6.51g.,10.04g;“1003-7”:5.8g.,31,5mm.,38.6-39.18%,6.56g.,10.48g.;“5161-2”:5.20g.,30.31 mm.,39-39.7%,6.80g.,10.76g,respectively.

1.对陆地棉与中棉的杂种第一代和克服杂种第一代的不孕性进行研究,初步找出了不孕的原因和克服办法,为创造种间杂种,丰富育种材料,提供了可能。2.种间杂种遗传基础复杂,与具有优良性状多的陆地棉品种回交,获得许多超越亲本性状的新类型,可以选育出丰产、优质、抗病性强等的新品系。3.杂种第一代花粉母细胞染色体数,在同一花蕾上就有所不同,说明受精卵细胞在分裂的过程中已不正常,每一细胞的染色体数也不尽相同。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关cotton的内容
在知识搜索中查有关cotton的内容
在数字搜索中查有关cotton的内容
在概念知识元中查有关cotton的内容
在学术趋势中查有关cotton的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社