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
   improve crop varieties 的翻译结果: 查询用时:0.176秒
图标索引 在分类学科中查询
所有学科
更多类别查询

图标索引 历史查询
 

improve crop varieties
相关语句
  作物品种改良
     Studies indicated that technique for introducing exogenous DNA be very impor-tant to improve crop varieties.
     研究表明,外源DNA导入技术将在作物品种改良上起非常重要的作用.
短句来源
  相似匹配句对
     It can improve the budding rate of seed and the yield of crop. [
     试验证明,该机能提高种子的发芽势、发芽率以及作物产量。
短句来源
     FERTILIZER DETERMINATION BY OPTIMIZATION TECHNIQUES TO IMPROVE CROP QUALITY
     最优化技术在确定最佳施肥量提高农产品品质上的应用
短句来源
     Objective To improve the
     目的为提高心电检测的准确度,在Windows95平台下建立了一个标准十二导心电信号同步检测分析系统。
短句来源
     How to improve it?
     如何才能改善这种状况呢?
短句来源
     Crop Design
     作物设计
短句来源
查询“improve crop varieties”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
没有找到相关例句


This paper summarized the results of studies on introduction of exogenous DNA into rice and wheat and its application in improvement of varieties in Plant Gentic Engi-neering Laboratory in 1987~1994.The contents involed DNA preparation of rice, wheat,corn and sorghum,exogenous DNA introduction(Pollen tube pathway technique,DNA pene-tration method),character variation. selection of variation,cultivation by demonstrating of new strains.Studies indicated that technique for introducing exogenous DNA be very impor-tant...

This paper summarized the results of studies on introduction of exogenous DNA into rice and wheat and its application in improvement of varieties in Plant Gentic Engi-neering Laboratory in 1987~1994.The contents involed DNA preparation of rice, wheat,corn and sorghum,exogenous DNA introduction(Pollen tube pathway technique,DNA pene-tration method),character variation. selection of variation,cultivation by demonstrating of new strains.Studies indicated that technique for introducing exogenous DNA be very impor-tant to improve crop varieties.

报道了外源DNA导入技术及其在作物品种改良上应用的研究结果,内容包括水稻、小麦、玉米和高粱等作物DNA的制备、外源DNA导入技术(花粉管通道技术、浸泡法)、后代性状的变异及变异的筛选、新品系示范栽培等。研究表明,外源DNA导入技术将在作物品种改良上起非常重要的作用.

Considering the process of crop utilizing rainwater in dryland farming the united formula of rainwater use efficiency of crops (PUE) explains the internal relations of several rates and efficiencies which influence PUE. PUE=SW/P×ET c/SW×T/ET c×Y/T. When a prcipitation is given, PUE could be increased to its maximum value through making SW/P (rate of rainwater collection and storage), ET c/SW (rate of water consumption on cropland), T/ET c (ratio of crop transpiration to cropland...

Considering the process of crop utilizing rainwater in dryland farming the united formula of rainwater use efficiency of crops (PUE) explains the internal relations of several rates and efficiencies which influence PUE. PUE=SW/P×ET c/SW×T/ET c×Y/T. When a prcipitation is given, PUE could be increased to its maximum value through making SW/P (rate of rainwater collection and storage), ET c/SW (rate of water consumption on cropland), T/ET c (ratio of crop transpiration to cropland evapotranspiration) and Y/T (crop watr use efficiency, WUE T) reaching into the highest values one after another. The precipitation, the crop potential yield in a rainfed land and the latent crop water use efficiency (WUE T or WUE ET ) are corresponding to each other in given crop varieties. Average PUE is equal to average WUE ET (Y/ET c) under the condition of no surface runoff and no fallow in the loess plateau, but lower than average WUE ET  under the other conditions. With the rotation system being rational in the loess plateau, to increase PUE firstly depends on detaining rainfall and runoff to infiltrate into the ground on the spot and restraining soil evaporation, then relies on having conditions of adequate fertilizer and optimum cultivation practices. A further potential of increasing PUE lies in improving crop varieties.

旱地作物雨水利用效率(PUE)的统一性表达式,从作物利用雨水的过程的角度上,阐释了制约PUE大小的若干比率及效率间的内在联系。PUE=SW/P×ETc/SW×T/ETc×Y/T。给定雨量时,渐次使雨水收存率(SW/P),农田水分消耗率(ETc/SW),作物蒸腾占农田耗水的比率(T/ETc),及作物水分利用效率(Y/T,即WUEr)达到最大,即可使PUE达到最大。一定作物品种条件下,降水量、作物降水生产潜力及作物潜在水分利用效率是互相对应的。在黄土高原,就多年均值而言,PUE通常小于WUEET(即Y/ETc),只有当无地表径流和无休闲时,二者才能相等;与合理的轮作制度相适应,PUE的提高首先在于强化降雨就地就近入渗拦蓄与抑制土壤物理蒸发;其次在于优化的包括养分供应在内的栽培措施。从长远看,抗旱高产品种的选育则是进一步提高PUE的潜力所在

The changing trends in foodgrain and oilseed production, and the affecting factors of that trends are analyzed in this paper. It is shown that the per unit yield is the predominant driving force of foodgrain and oilseed production in Tibet. Sustainable increase of the per unit yield of foodgrain and oilseed production, and following countermeasures should be adopted: application of improved crop varieties, promotion of the cultivation system, improvement of the low yield land and building up of the capacity...

The changing trends in foodgrain and oilseed production, and the affecting factors of that trends are analyzed in this paper. It is shown that the per unit yield is the predominant driving force of foodgrain and oilseed production in Tibet. Sustainable increase of the per unit yield of foodgrain and oilseed production, and following countermeasures should be adopted: application of improved crop varieties, promotion of the cultivation system, improvement of the low yield land and building up of the capacity for irrigation system for cultivated land.

本文对西藏粮油生产发展趋势与特点及影响西藏粮油生产的因素进行了分析。结果表明: 单产是目前西藏粮油总产量提高的首要驱动力。而提高粮油单产则需采取: 切实加强农作物优良品种的选育与推广; 粮油种植技术规范化、系统化和模式化; 大力推广低产田改造技术, 扩大中低产田改造的面积; 兴修水利和确保水利设施的质量等措施。

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