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中国杂交稻
相关语句
  chinese hybrid rice
     Demonstrated in the Philippines ahead of Schedule,Chinese Hybrid Rice Yielded over 10 t/hm~2 under an Area of 10 hm~2
     中国杂交稻在菲提前示范10 hm~2连片种植单产超10 t
短句来源
     7. It was found that the difference of biomass production and nitrogen uptake by rice was insignificant between Chinese hybrid rice Shanyou63 and tropical indica rice IR72 under tropical ecosystem conditions.
     (7)中国杂交稻汕优63在热带生态气候条件下的生物产量与热带釉稻IR72相当,氮肥的吸收利用率与差异不显著。
短句来源
     Utilization of durable and multi-resistant IR varieties like IR64 as restorer lines might be an alternative approach to improve hyper-susceptibility of Chinese hybrid rice to insect pests.
     利用持久抗性和多抗性的IR品种如IR6 4作为恢复系是改善中国杂交稻的超感虫性的一种有效方法。
短句来源
     Causal Analysis on the Whitebacked Planthopper Prevalence in Chinese Hybrid Rice Shanyou 63
     中国杂交稻组合汕优63上白背飞虱多发生的成因探讨
短句来源
     Highly susceptible Chinese hybrid rice gave significant impact on the insect pest ecology.
     介绍了高度感虫的中国杂交稻推广带来水稻害虫生态地位发生的变化。
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  相似匹配句对
     e-Hybrid Rice
     e杂交
短句来源
     The Research and Development of eui-Hybrid Rice
     e-杂交的研究与发展
短句来源
     Hybrid Rice in China
     中国杂交
短句来源
     The necessary of developing hybrid rice in northern China was analyzed.
     分析了中国北方发展杂交的必要性。
短句来源
     Advances on Hybrid Rice Seed Prodution Techniques in 1980's of China
     中国8O年代杂交种子生产技术的进步
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Chinese hybrid rice seed yield has increased from less than 0.6751/ha. in 1980 to over 1.95t/ha. in 1989. Seed purity has increased by 5-8% over the last decade, getting 97% in 1989.This paper analysed the progress of seed production techniques in following six aspects in functional sequence.1. Sowing intervals of male and female parents and heading date adjustment techniques needed for synchronization of flowering.2. Selection of optimum flowering season.3. Techniques of raising seedings, row ratio, row direction...

Chinese hybrid rice seed yield has increased from less than 0.6751/ha. in 1980 to over 1.95t/ha. in 1989. Seed purity has increased by 5-8% over the last decade, getting 97% in 1989.This paper analysed the progress of seed production techniques in following six aspects in functional sequence.1. Sowing intervals of male and female parents and heading date adjustment techniques needed for synchronization of flowering.2. Selection of optimum flowering season.3. Techniques of raising seedings, row ratio, row direction and planting patterns of male to female parents.4. Gibberellin application techniques.5. Irrigation and fertilizer management, diseases and insects control.6. Improvement of outcrossing rates of male sterile lines.The rise of hybrid seed purity owes largely to the improvement of seed production system, to the execution and popularization of "three lines with seven plots" original seed production techniques and reliable isolation based on overall arrangement.In future, the increase of hybrid rice seed yields will depend on the extension of techniquse established, reduce the phenomena of serious disequilibrium of seed yields in different places. It can be expected that the development of CMS lines or photo-sensitive male sterile lines possessing good outcrossing rate and good grain quality. the overcome of sprout-before—harvest on CMS line plants. the improvement of plant hormone application techniques, and the effective control of rice kernel smut will be the important research subjects for continued high, stable yield of hybrid rice seed production in the corning ten years.

1989年和1980年相比,中国杂交稻制种面积没有扩大,但平均单产增加了2倍,种子纯度大约上升5个百分点。种子生产技术的进步,主要表现在保证花期相遇的父母本播差及调节技术;安全花期的确定;育秧技术的改进和父母本配置;肥水运筹和防治病虫害;“九二○”施用技术的改进;亲本异交性状的改良。同时“三系七圃法”原种生产技术的普及和布局控制为基础的安全隔离,是提高种子纯度的主要关键。

Highly susceptible Chinese hybrid rice gave significant impact on the insect pest ecology. The brown planthopper (BPH), Nilaparvata lugens, and the whitebacked planthopper (WBPH), Sogatella furcifera, have raised as the most prominent outbreak-prone pests of Chinese hybrid rice. Although WBPH was only a secondary insect pest of rice in China before 1970s, it increased greatly in the hybrid rice areas in 1980s. WBPH also became an economic insect pest of japonica rice in Central China due to its massive...

Highly susceptible Chinese hybrid rice gave significant impact on the insect pest ecology. The brown planthopper (BPH), Nilaparvata lugens, and the whitebacked planthopper (WBPH), Sogatella furcifera, have raised as the most prominent outbreak-prone pests of Chinese hybrid rice. Although WBPH was only a secondary insect pest of rice in China before 1970s, it increased greatly in the hybrid rice areas in 1980s. WBPH also became an economic insect pest of japonica rice in Central China due to its massive displacement from hybrid rice area in South China. BPH was temporally suppressed by the hybrid rice with the Bph 1 gene for BPH-resistance. However, the BPH adapted to them by shifting biotype, when the resistant hybrid rice spread over the insect migration zone in South- and Central China. After 1990, previously BPH-resistant hybrid rice became highly susceptible to BPH. Lack of major genes for resistance does not account enough for the hyper- susceptibility of Chinese hybrid rice to the planthoppers. Heterotic vigorous growth of hybrid rice might be partially responsible for the enhanced fecundity of the planthoppers. Hyper-susceptibility of Chinese hybrid rice to the rice planthoppers is primarily inherited from the WA-CMS lines. Thus, CMS lines are needed to improve insect pest resistance in hybrid rice. Utilization of durable and multi-resistant IR varieties like IR64 as restorer lines might be an alternative approach to improve hyper-susceptibility of Chinese hybrid rice to insect pests.The striped stemborer, Chilo suppressalis and the yellow stemborer, Scirpophage incertulas also increased on Chinese hybrid rice, which is more favorable as their food plants and more tolerant to their infestations than inbred rice. Yield loss assessments, with special reference to the plant compensation to the stemborer infestation, and ecological interactions between stemborers and hybrid rice are needed to evaluate actual impact of and practical field resistance to stemborers in hybrid rice.

介绍了高度感虫的中国杂交稻推广带来水稻害虫生态地位发生的变化。褐飞虱和白背飞虱上升为杂交稻上最突出的极易爆发成灾的重要害虫。 2 0世纪 70年代以前 ,白背飞虱只是水稻上的次要害虫 ,但 80年代以来其种群大大增加。由于它从中国南部杂交稻种植区大范围迁飞 ,白背飞虱也成为中国中部地区粳稻上的重要害虫。由于种植具有抗褐飞虱基因Bph1的杂交稻组合 ,褐飞虱种群曾得到暂时的控制。然而 ,抗虫性的杂交稻在中国中部和南部稻飞虱迁飞区推广以后 ,褐飞虱生物型发生了改变 ,对抗虫品种产生了适应性。 1990年以后 ,以前表现抗虫的杂交稻变得高感褐飞虱。缺乏抗虫性主基因不是中国杂交稻对稻飞虱超感性的充分理由 ,杂交稻旺盛生长的杂种优势可能是稻飞虱生殖力提高的部分原因。中国杂交稻对稻飞虱的超感虫性是从不育系遗传而来的。因此 ,杂交稻抗虫性的提高有赖于不育系的改良。利用持久抗性和多抗性的IR品种如IR6 4作为恢复系是改善中国杂交稻的超感虫性的一种有效方法。杂交稻上二化螟和三化螟为害也有所增加。与常规稻相比 ,杂交稻是一种更有利的食料植物且耐虫性更强。进行水稻产量损失的估计 ,...

介绍了高度感虫的中国杂交稻推广带来水稻害虫生态地位发生的变化。褐飞虱和白背飞虱上升为杂交稻上最突出的极易爆发成灾的重要害虫。 2 0世纪 70年代以前 ,白背飞虱只是水稻上的次要害虫 ,但 80年代以来其种群大大增加。由于它从中国南部杂交稻种植区大范围迁飞 ,白背飞虱也成为中国中部地区粳稻上的重要害虫。由于种植具有抗褐飞虱基因Bph1的杂交稻组合 ,褐飞虱种群曾得到暂时的控制。然而 ,抗虫性的杂交稻在中国中部和南部稻飞虱迁飞区推广以后 ,褐飞虱生物型发生了改变 ,对抗虫品种产生了适应性。 1990年以后 ,以前表现抗虫的杂交稻变得高感褐飞虱。缺乏抗虫性主基因不是中国杂交稻对稻飞虱超感性的充分理由 ,杂交稻旺盛生长的杂种优势可能是稻飞虱生殖力提高的部分原因。中国杂交稻对稻飞虱的超感虫性是从不育系遗传而来的。因此 ,杂交稻抗虫性的提高有赖于不育系的改良。利用持久抗性和多抗性的IR品种如IR6 4作为恢复系是改善中国杂交稻的超感虫性的一种有效方法。杂交稻上二化螟和三化螟为害也有所增加。与常规稻相比 ,杂交稻是一种更有利的食料植物且耐虫性更强。进行水稻产量损失的估计 ,尤其是水稻本身对螟虫为害的补偿能力 ,以及螟虫和杂交稻之间的生态学关系的研究有助于评价杂交稻对螟虫?

Population build-up of the whitebacked planthopper (WBPH), Sogatella furcifera, was comparatively observed on a Chinese hybrid rice Shanyou 63 (SY-63) and inbred rice Chunjiang 11 (CJ-11) under the field conditions. WBPH immigrated and laid eggs evenly to the hybrid rice SY-63 and CJ-11. WBPH established significantly higher density of population on SY-63 than did on CJ-11,because of different egg mortality between the varieties. Population build-up by WBPH was compared between SY-63 and its parental lines....

Population build-up of the whitebacked planthopper (WBPH), Sogatella furcifera, was comparatively observed on a Chinese hybrid rice Shanyou 63 (SY-63) and inbred rice Chunjiang 11 (CJ-11) under the field conditions. WBPH immigrated and laid eggs evenly to the hybrid rice SY-63 and CJ-11. WBPH established significantly higher density of population on SY-63 than did on CJ-11,because of different egg mortality between the varieties. Population build-up by WBPH was compared between SY-63 and its parental lines. WBPH population was suppressed in the restorer line Minghui 63 (MH-63), while exceedingly promoted in Zhenshan 97A (ZS-97A) and Zhenshan 97B (ZS-97B), the CMS and its maintainer lines, respectively. Biomasses of SY-63 and ZS-97A were equally efficiently converted to WBPH biomass. However, SY-63 allowed WBPH to reproduce more progenies without suffering destructive damages, because of its greater biomass productivity compared to ZS-97A. WBPH females excreted larger amounts of honeydew, indicating higher rate of sucking on ZS-97A and ZS-97B, and relatively less honeydew on MH-63 than on SY-63. WBPH sucking on ZS-97A could be stimulated by significantly higher concentration of free amino acids in the phloem sap. On the contrary, MH-63 might suppress WBPH sucking due to its poor amino acid components in the phloem sap. As a conclusion, prevalence of WBPH in SY-63 was caused by extreme susceptibility inherited from ZS-97A, and great tolerance to WBPH infestation due to heterosis in SY-63. The extreme susceptibility was not associated with the CMS trait in ZS-97A.

以汕优 6 3及其亲本、常规稻春江 11为材料 ,研究了白背飞虱在中国杂交稻品种汕优 6 3上大量发生的主要原因。从杂交稻汕优 6 3和常规粳稻春江 11上白背飞虱的发生情况来看 ,白背飞虱长翅型雌成虫的迁入密度和产卵数没有明显差异 ,种群的变化也一致。但汕优 6 3的卵孵化率较高 ,若虫种群密度也明显较高。从汕优 6 3及其亲本对白背飞虱的反应来看 ,汕优 6 3的恢复系明恢 6 3抑制白背飞虱的繁殖 ,但不育系珍汕 97A和保持系珍汕 97B对白背飞虱繁殖有促进作用。珍汕 97A和汕优 6 3的稻 飞虱间的干物质转化率基本相同 ,但汕优 6 3具有较高的干物质生产能力 ,可能使白背飞虱繁殖密度较高。日平均蜜露分泌量 ,以珍汕 97A和珍汕 97B最多 ,明恢 6 3最少 ,汕优 6 3居中。珍汕 97A的筛管液中大部分是主要氨基酸 ,浓度高于汕优 6 3和明恢 6 3。汕优 6 3与明恢 6 3的筛管液中氨基酸的总浓度基本相同 ,但微量氨基酸浓度高于明恢6 3。总的来看 ,汕优 6 3的白背飞虱繁殖率较高 ,主要原因在于不育系珍汕 97A的高感虫性和杂种优势的高干物质转化能力产生的耐受性 ,而...

以汕优 6 3及其亲本、常规稻春江 11为材料 ,研究了白背飞虱在中国杂交稻品种汕优 6 3上大量发生的主要原因。从杂交稻汕优 6 3和常规粳稻春江 11上白背飞虱的发生情况来看 ,白背飞虱长翅型雌成虫的迁入密度和产卵数没有明显差异 ,种群的变化也一致。但汕优 6 3的卵孵化率较高 ,若虫种群密度也明显较高。从汕优 6 3及其亲本对白背飞虱的反应来看 ,汕优 6 3的恢复系明恢 6 3抑制白背飞虱的繁殖 ,但不育系珍汕 97A和保持系珍汕 97B对白背飞虱繁殖有促进作用。珍汕 97A和汕优 6 3的稻 飞虱间的干物质转化率基本相同 ,但汕优 6 3具有较高的干物质生产能力 ,可能使白背飞虱繁殖密度较高。日平均蜜露分泌量 ,以珍汕 97A和珍汕 97B最多 ,明恢 6 3最少 ,汕优 6 3居中。珍汕 97A的筛管液中大部分是主要氨基酸 ,浓度高于汕优 6 3和明恢 6 3。汕优 6 3与明恢 6 3的筛管液中氨基酸的总浓度基本相同 ,但微量氨基酸浓度高于明恢6 3。总的来看 ,汕优 6 3的白背飞虱繁殖率较高 ,主要原因在于不育系珍汕 97A的高感虫性和杂种优势的高干物质转化能力产生的耐受性 ,而不是珍汕 97A的白背飞虱感虫性和细胞质不育导致的。

 
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