查询词典 cattle breeding

Potato breeding for late blight resistance was one of the earliest practices mankind used to combat plant pathogens by means of genetic improvement, but the disease has not been controlled by resistance breeding so far.

马铃薯抗晚疫病育种是通过遗传操作来抵抗植物病害的最早的人类实践之一，但至今收效甚微，从野生种导入的抗病基因在田间很容易失效。

At present,the breeding should be established in the selecting breeding and obtain pure line to keep the stable inheritance of economic traits.

随着栽培经验的积累和科学技术的发展，紫菜的遗传育种已从最初的选择性育种发展到利用基因工程技术进行遗传性状的改造，并建立纯系使经济性状能够稳定遗传。

This research according to the problems of new variety breeding and new variety spreading existed in domestic, aims at breeding a new sweet pea variety with the characteristic of good quality and high yield, fit for eat raw spend and quick-freeze processing, and establishes the technology system of the new variety spreading.

本研究针对国内甜豌豆新品种的选育及推广所存在的问题，旨在选育一个优质高产、鲜食加工兼用的菜用甜豌豆新品种，并对新品种推广的技术体系进行探索研究。

The company has built fiveseed market, Rex Rabbit breeding three games, two meat rabbit breeding field, fineyears to cultivate more than 30,000 only, and in Shanxi, Gansu and other places to build a base there is rabbitry.

本公司建有种兔良种场五个，獭兔良种场三个，肉兔良种场两个，年培育优良种兔三万多只，并在山西、甘肃等地建有养兔基地。

Based on the established GIS of the Oncomcelania Snails' distribution in Dongting Lake, the author analyzes the environmental condition of the Oncomcelania Snails' habitates comprehensively by the spatial analyzing technology. The results are as following: firstly, the predominant vegetation of Oncomcelania Snails habitat is reed and sedgy. The habitats with reed has a higher livability than with sedgy as dominating vegetation. However, the diffusion of Oncomcelania Snails is much serious in the habitats with sedgy. Secondly ,the predominant soil type of the Oncomcelania Snails breeding area is temporary submergic paddy soils, which is in weak acidity environment, of that PH value is 5.5--7.5, and the organic content is in 2---3%. Thirdly, the 80 percent of the Oncomcelania Snails breeding area, the normalized difference vegetation index of that is in 0.100-0.375%, and the soil humidity of that is in 0.202—0.507, and the distance to the water of that is in 10-230 meters.

在已建立的洞庭湖区江滩钉螺分布地理信息系统的基础上，运用GIS空间分析技术，对钉螺孳生地的环境状况作了比较全面的分析，发现洞庭湖区江滩钉螺孳生地植被类型主要为芦苇和莎草类，钉螺在莎草地带中的存活率高于芦苇地带，而钉螺感染情况最严重的在芦苇地带中；孳生地的土壤类型主要为潴育性水稻土；孳生地土壤PH值处于5.5-7.5之间的弱酸性环境，有机质含量处于2-3%之间；80%孳生地的植被标化指数在0.100-0.375之间、土壤湿度在0.202-0.507之间、近水源距离为10-230之间。

The results indicated that a great progress for Fususium wilt resistance breeding had been achieved, but progress for Verticillium wilt resistance breeding was slow.

结果显示，抗枯萎病育种成效显著，品种对枯萎病抗性呈稳步上升趋势；品种对黄萎病抗性亦呈上升趋势，但进展缓慢。

First we will use sea water for breeding, then we will develop and utilize the moderate brine and saturated brine drained after breeding to extract bromine for raw salt solarization.

项目拟在盐碱滩上引入海水，先用海水进行养殖，然后对养殖后排出的中度卤水、饱和卤水进行开发利用，提取溴素，晒制原盐，再将晒盐后排出的苦卤进行回收加工氯化镁、氢氧化镁等化工产品，最终实现海水"零排放"，达到最大限度利用资源，降低生产成本，实现可持续发展。

From October, 2005 to September, 2006, 16 different kinds of stridulation of the Soul's Barwing were recored during its breeding and non-breeding seasons, of which there were 14 kinds of the male's calls and 10 of the female's calls.

2005年10月～2006年9月录制了灰头斑翅鹛繁殖期和非繁殖期的16种鸣声，其中雄鸟鸣声有14种，包括：3种休息时鸣声，3种跳跃、飞行时鸣声，1 种报警鸣声，1种求救鸣声，1 种营救鸣声，1种恫吓鸣声及4种鸣唱。

Quantitative exploration of population differentiation will benefit the utilization and improvement of wasp breeding; in-depth studies on the capability of avoiding superparasitism, host selection and adaptability of Trichogramma populations collected from different localities and hosts can produce some conclusions significant to Trichogramma application; studies on ovipositional behaviors are important for breeding improvement; co-parasitism is a common behavior among egg-parasitoids, and also an important factor affecting artificial rearing and field release; observations on inter-specific competition are helpful for choosing the most competitive natural enemies. This dissertation treated of the pragmatic aspects of the diagnostic system, i.

赤眼蜂种群分化的定量研究有利于蜂种及其品系的利用和改良；对采自不同地域和不同寄主的赤眼蜂种群的寄主选择、避免过寄生的能力及其适应性等进行深入细致的研究，可以得到一些对赤眼蜂应用有意义的结论；研究赤眼蜂的产卵行为对改进其繁殖和利用具有重要意义；共寄生是卵寄生蜂的一种常见现象，也是影响赤眼蜂人工繁殖和田间应用的重要因素；赤眼蜂种间竞争行为研究可以遴选竞争力最强的天敌。

According to the pig genetic breeding theories and pig national genetic evaluationscheme,The"FOOL"and"WYSWYG"system of the pig breeding management andanalysis which programmed with the OOP's technology was developed with theinterfacial Man-machine conversation There were pig data collection and managementand genetic analysis,providing teledata.

采用最为流行的面向对象的事件驱动编程技术和界面化程序设计方法，运用Visual Foxpro关系管理数据库并结合Microsoft Fortran数值计算语言，编制完成了"所见即所得"的"傻瓜化"种猪育种信息管理与分析系统。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。