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
   varieties of cotton 的翻译结果: 查询用时:0.011秒
图标索引 在分类学科中查询
所有学科
农作物
植物保护
更多类别查询

图标索引 历史查询
 

varieties of cotton
相关语句
  棉花品种
     An Analysis of Amino Acids of the Resistant Varieties of Cotton to Fusarium Wiltf
     抗枯萎病棉花品种氨基酸分析
短句来源
     A total of 145 volatile extracts were made from 12 varieties of mung bean and 5 varieties of cotton plants using the centrifugation, distillation, condensation and head-space methods.
     用离心法、蒸馏法、冷凝法和吸附法从12个绿豆品种和5个棉花品种植株中提取145份挥发物。
短句来源
     A trial involving 4 years and 7 sites and 10 varieties of cotton was carried out and analyzed to compare the predictive accuracy of the Bayesian estimates and arithmetic means.
     并利用一套包含 4年、7个试点和 10个棉花品种的多年多点试验对 Bayes估值和算术平均值的预测精度进行比较。
短句来源
     In order to solve the contradiction between oxygen and water, germination tests were conducted to evaluate the effect of different temperature and different kinds of sandy bed for two varieties of cotton seeds.
     为解决棉花种子发芽试验中氧气和水分的矛盾 ,本研究对两个棉花品种运用不同类型的沙床和不同温度进行发芽试验。
短句来源
     Six varieties of cotton belonging to three different chilling resistant levels, i. e.very early, intermediate and late maturity were analyzed for the content of soluble protein in cotton seedlings which have been treated at low temperature(40℃) for 12 hours.
     本实验以分属特早熟,中熟和晚熟三类不同抗冷级别的6个棉花品种为材料,将其幼苗经4℃低温处理12小时,测定可溶性蛋白质的含量,并分析其变化情况。
短句来源
更多       
  品种棉花
     Study on Simulating Temperature’s Impact on Development Speed of Different Varieties of Cotton
     温度影响不同品种棉花发育速度的模拟研究
短句来源
     The results show that this model could make a good reflection of temperture's impact on different varieties of cotton. This model could provide scientific basis for forecast of cotton development period and management of farmland production.
     结果表明:本模型能较好地反映温度对不同品种棉花发育速度的影响,可为棉花发育期预报及大田生产管理提供科学依据
短句来源
  “varieties of cotton”译为未确定词的双语例句
     The systematic investigation on population dynamics on different varieties of cotton, including two Bt cotton lines, GK19 (expressing Cry1A insecticidal toxic protein) and SGK321 (expressing Cry1A/CpTI insecticidal toxic proteins), and two conventional cottons (Simian3 and Shiyuan321), indicated that there were no significant differences in pest mirid density among them.
     对转基因抗虫棉GK19(表达Cry1A杀虫蛋白)、SGK321(表达Cry1A/CpTI杀虫蛋白)和普通棉花泗棉3号、石远321的研究表明2种盲蝽在不同品种上的季节性数量动态没有显著性差别。
短句来源
     Studies on the protein and oil contents of cotton seed kernel from 595 varieties of cotton showed that both contents were 34.64 and 39.03% for upland varieties (Gossyplum hirsutum),38.78 and 34.76% for G. arboreum, and 38.21 and 35.01% for G. africanum, respectively.
     对棉花595个品种和仁的蛋白质含量和油分含量研究表明,陆地棉(Cossypiumhirsutum)品种中,二者平均含量依次为34.64%和39.03%,亚洲棉(C.arboreum)品种为38.78%和34.76%,非洲棉(G.africanum)品种为38.21%和35.01%、三个种之间。
短句来源
     It studied the genetic diversity of 50 cultivated varieties of cotton by isozymei、seed protein and SSR in Xinjiang .
     本文通过同工酶、种子贮藏蛋白以及SSR三种标记方法对50份新疆棉花栽培种进行了遗传多样性分析。
短句来源
     The experiment of growing cotton of low gossypol containing, earried out at Xiping Town in 1991~1992, has indicated that the yield and the qualities of fibre and seed of the low gossypol cotton varieties "Mianwu4176" and "Xiwu252" are superior to that of common varieties of cotton.
     1991~1992年在低酚棉试种中证实“绵无4176”和“西无252选”之棉花产量、棉纤维及棉籽品质均优于常规品种。
短句来源
     A Study on the Growth, Reproduction and Honeydew Excretion of the Cotton Aphid (Aphis gossypii Glover) on Different Varieties of Cotton
     棉蚜Aphis gossypii Glover在棉花不同品种上的生长繁育和排蜜的研究
短句来源
更多       
查询“varieties of 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。
  varieties of cotton
Rapid method for identifying highly productive varieties of cotton by a selective process
      
A comparative study of the histones of some varieties of cotton plant
      
This study demonstrates the potential for particle bombardment to introduce commerically important genes directly into elite varieties of cotton.
      
A gene encoding phosphinothric in acetyltransferase (bar) from Streptomyces hygroscopicus was inserted into elite varieties of cotton through particle bombardment.
      
Performance of the image analysis algorithm was compared with visual inspection for number and position of convolution segments in three different varieties of cotton.
      
更多          


In order to test the tactic response of the cotton bollworm, Heliothis ammigera(Hubner), to the odors of its preferred host plant, certain volatile substances known tobe present in the cotton plant such as methanol, trimethylamine and vanillic acid werechosen as olfactory stimulants. It was found that the larvae in the early three instarswere attracted by the vapors of vanillic acid and trimethylamine in various degrees, butmethanol vapor had a repellent effect. These vapors were emitted from aqueous solu-tions...

In order to test the tactic response of the cotton bollworm, Heliothis ammigera(Hubner), to the odors of its preferred host plant, certain volatile substances known tobe present in the cotton plant such as methanol, trimethylamine and vanillic acid werechosen as olfactory stimulants. It was found that the larvae in the early three instarswere attracted by the vapors of vanillic acid and trimethylamine in various degrees, butmethanol vapor had a repellent effect. These vapors were emitted from aqueous solu-tions at the concentrations of 0.006 M 0.02 M and 0.03 M respectively. By using thesugars, free amino acids and vitamins which were shown to be present in the cotton plantas gustatory stimulants and incorporating them separately in the agar-based media, it wasfound that at the concentration of 0.02 M sucrose and fructose had a definite phago-stimulating effect, glucose was less effective, and xylose was indifferent. At low concen-trations, only DL-alanine among the five amino acids tested had some phago-stimulatingeffect, and ascorbic acid at 0.01 M was phago-inhibitive. These results show that thecotton bollworm as a polyphagous species responds differently to the individual com-ponents of the host plant which may act either as attractants or repellents, phago-stimulants or phago-inhibitors. Different species and varieties of cotton plants and some descendants from thehybridization between cotton and some other malvaceous plants such as Hibiscus palus-tris,H. mutabilis, Malva sylvestris and Althaea rosea were used to test the tactic andfeeding responses of the cotton bollworm. It was found that when the larvae had thechance to choose their food, they were more readily attracted to the leaves of Gossypiumhirsutum and certain variety of G. barbadense, but not so readily to some of the hybriddescendants, some of which may even show repulsive properties in the test. In thisrespect different varieties of H. barbadense also had different effects. When there wasno chance to choose their food, the larvae were observed to consume different quantitiesof foliage from different plants in a definite period of time and to become conditionedto the host plants with which they were brought up. Simultaneous chemical analysis showed that the water content as well as the total andprotein nitrogen contents of the cotton leaves gradually decreased as growth proceeded.The total nitrogen content also dropped when the squares developed into flowers, andthe protein content was found to reach the maximum when the squares had attained alength about 2.5 cm. The total and protein nitrogen contents of the bolls dropped asthe latter grew and aged. The total and protein nitrogen contents of the leaves seemedto be the highest as compared with those of the squares and bolls. The quantities ofsoluble and reducing sugars of the young leaves exceeded those of the tender and oldleaves, but the sugar contents of the bolls were found to be much higher than those ofthe leaves. The sugar contents of the squares were relatively low. In spite of these disparities, it was possible to grow the larvae after hatching into maturity separately andsolely on the leaves, squares and bolls of the cotton plants. In these rearing experi-ments, the cumulative quantities of food consumed, the rates of development and mor-tality, and the weights of pupae thus obtained were found to be conspicuously different.It is interesting to note that the larvae during the whole course of development wouldconsume the old leaves to an amount which may double the total quantity of the foodconsumed when the young leaves were offered. When the bolls were used as food thecumulative quantity consumed exceeded several times that when the leaves were used.This difference is presumably attributed to the differences in the water and sugar con-tents of the different organs of the cotton plant, as already shown that sugars usuallywould evoke a strong phago-stimulating effect. The general impression is that the plantorgans which have the higher sugar and water contents usually have a better nutritiveeff

本工作选用棉花不同器官所含有的几种化学成分作为嗅觉和味觉刺激剂,测验棉铃虫对它们的反应;结果表明一至三龄的幼虫对甲醇三甲基胺、香草酸等的趋性不同,四龄幼虫对不同的糖类、氨基酸等的取食反应也各不一。这说明幼虫对食料植物中的个别化学成分有感觉辨识的能力。用不同品种的海岛棉、陆地棉、以及棉花和其它锦葵科植物杂交所产生的后代的叶片来试验棉铃虫对它们的趋性和取食反应,结果表明当有选择的机会时幼虫对陆地棉和一定品种海岛棉有较强的趋性,对某些杂交后代的趋性很弱。在不能选择的条件下棉铃虫在一定时间内对不同种类或品种的棉叶的取食量也不相同,并对原来的食料植物可形成条件化。 曾对棉花不同器官的含水量、含氮物质和糖类进行了测定,同时分别用叶、蕾和铃将新孵化的幼虫饲养到老熟。幼虫取食不同器官时的累积食量、发育速度、死亡率,和变成的蛹的重量均有明显的差别。当以大叶为食时幼虫的总食量超过以嫩叶为食时的一倍以上;以铃为食时总食量可为以嫩叶为食时的数倍。这种差异可能是因铃中水分和含糖量较高,对幼虫的取食发生强烈的助长作用所造成的。因此,同株植物上含糖和含水缺多的器官对棉铃虫似乎有较好的营养效应,而这种效应可能是通过糖类等的味觉刺激来增加取食...

本工作选用棉花不同器官所含有的几种化学成分作为嗅觉和味觉刺激剂,测验棉铃虫对它们的反应;结果表明一至三龄的幼虫对甲醇三甲基胺、香草酸等的趋性不同,四龄幼虫对不同的糖类、氨基酸等的取食反应也各不一。这说明幼虫对食料植物中的个别化学成分有感觉辨识的能力。用不同品种的海岛棉、陆地棉、以及棉花和其它锦葵科植物杂交所产生的后代的叶片来试验棉铃虫对它们的趋性和取食反应,结果表明当有选择的机会时幼虫对陆地棉和一定品种海岛棉有较强的趋性,对某些杂交后代的趋性很弱。在不能选择的条件下棉铃虫在一定时间内对不同种类或品种的棉叶的取食量也不相同,并对原来的食料植物可形成条件化。 曾对棉花不同器官的含水量、含氮物质和糖类进行了测定,同时分别用叶、蕾和铃将新孵化的幼虫饲养到老熟。幼虫取食不同器官时的累积食量、发育速度、死亡率,和变成的蛹的重量均有明显的差别。当以大叶为食时幼虫的总食量超过以嫩叶为食时的一倍以上;以铃为食时总食量可为以嫩叶为食时的数倍。这种差异可能是因铃中水分和含糖量较高,对幼虫的取食发生强烈的助长作用所造成的。因此,同株植物上含糖和含水缺多的器官对棉铃虫似乎有较好的营养效应,而这种效应可能是通过糖类等的味觉刺激来增加取食量所造成。

The changes in peroxidase isozymes of different varieties of cotton seedlings after inoculation by Fusarium oxysporum f.sp.vasinfectum was studied with polyacrylamide gel electrophoresis.After inoculation,the activities of peroxidase isozymes in coty- ledons were intensified and new bands appeared.The enzyme activities of susceptible varities (4 varieties)were higher than those of the resistant ones (8 varieties).The susceptible varieties invariably had one or two more isozyme bands than...

The changes in peroxidase isozymes of different varieties of cotton seedlings after inoculation by Fusarium oxysporum f.sp.vasinfectum was studied with polyacrylamide gel electrophoresis.After inoculation,the activities of peroxidase isozymes in coty- ledons were intensified and new bands appeared.The enzyme activities of susceptible varities (4 varieties)were higher than those of the resistant ones (8 varieties).The susceptible varieties invariably had one or two more isozyme bands than the resistant ones.The changes in intensity of the peroxidase isozymes of cotton seedlings after infection is coincident with the appearance of morphological symptom of the disease. The number of isozymes increased with the severity of the disease,so that the changes in the number of isozymes in the infected plant can be taken as the intrinsic“bioche- mical symptom”of the plant.There were distinct differences among the three species of cotton plants in their peroxidase isozymes.The number of isozymes is greatest in Island cotton,which is highly susceptible to fusarial wilt disease,followed by the susceptible varieties of Continent cotton and its resistant varieties,while the least is the Chinese cotton which is immune to the disease.It is suggested that the appearauce of more new isozymes in the susceptible varieties upon inoculation may be used as a criterion for screening the resistant varieties of cotton plants from those susceptible to fusarial wilt disease.

利用聚丙烯酰胺凝胶电泳研究了棉花不同品种接种枯萎菌(Fusarium oxysporum f.sp.vasinfectum)后过氧化物酶同工酶的变化。接种后,感病品种(4个)比抗病品种(8个)的过氧化物酶同工酶的活性强,酶带数增多1—2条。这种变化与植株外部表现的症状相一致,即病情越重,酶带数越多。因此,感病植株的同工酶变化可以看作植株内部的“生化症状”。海岛棉、陆地棉和中棉之间,过氧化物酶同工酶存在着明显的差异。高度感染枯萎病的海岛棉同工酶最多(8条),其次为陆地棉的感病品种(7条),再次为陆地棉的抗病品种(6条),不感染枯萎病的中棉同工酶最少(4条)。由于抗病品种与感病品种过氧化物酶对枯萎菌侵染所作出的反应不同,因此,可以利用接种后感病品种比抗病品种产生新的酶带较多的特点,作为筛选棉花抗枯萎病品种的一种技术。

The resistance of 100 varieties of cotton to the cotton aphid (Aphis gossypii Glover) was studied and identified with the exponent method of aphid damage investigation developed by the author from 1973 to 1976 in the experimental fields.All the identified varieties collected from both our native land and fore- ign lands were infested by the aphids,but there were different levels of aphid infestation.The key morphological character of the varieties with resistance to the aphids is hairiness...

The resistance of 100 varieties of cotton to the cotton aphid (Aphis gossypii Glover) was studied and identified with the exponent method of aphid damage investigation developed by the author from 1973 to 1976 in the experimental fields.All the identified varieties collected from both our native land and fore- ign lands were infested by the aphids,but there were different levels of aphid infestation.The key morphological character of the varieties with resistance to the aphids is hairiness on the underside of the leaves,which may prevent them from feeding and cause a decrease in fecundity. The hairiness on the underside of leaves gradually increases as the plants of hairy varieties grow and develop.The hairiness of all the varieties may divi- ded into five levels and can be identified through observation with our eyes and contact with our hands in the late period of cotton development.This method may be also used to select the cotton plants or varieties with resisdance to the aphids. The hairy cotton varieties may reduce aphid infestation in the seedling,squ- are and ball periods,but there are no varieties with high resistance among them. In order to control aphid infestation it is necessary to combine varietal resistance with biological,chemical and other methods especially in the years when the cotton plants are infested seriously by the aphids. In future studies it will be necessary for us to look for other aphid-resistant factors in cotton,such as biochemical character,so that we may find new resi- stance resources and breed new varieties wilh high levels of resistance。

1973—1976年作者对国内外收集到的近100个品种,运用设计的蚜害指数调查法进行了抗蚜性鉴定。所有品种均受蚜害,但受害程度不同。抗蚜品种的主要形态特征是叶背茸毛浓密,影响蚜虫的安定取食,繁殖量降低。抵抗其他棉虫的形态特征,如红叶,鸡脚叶,无蜜腺,苞叶窄狭开张,以及棉籽醇含量高,不是抗蚜的特征特性。棉花叶背茸毛随着植株个体发育逐渐增多,故不同生育期棉株抗蚜性不同,幼苗期较不抗蚜。不同品种叶背茸毛根据从无到有,从稀到密分为五级,眼观手摸可以区别,这种方法可用来选择抗蚜单株和品种。多毛特征的抗蚜品种可减轻蚜害,但缺乏高抗类型。故棉花品种抗蚜的研究还需从生化等方面寻找抗性因子,发掘抗蚜资源,培育高抗品种。

 
<< 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varieties of cotton的内容
在知识搜索中查有关varieties of cotton的内容
在数字搜索中查有关varieties of cotton的内容
在概念知识元中查有关varieties of cotton的内容
在学术趋势中查有关varieties of 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