查询词典 fertilization

For an unassisted fertilization to occur, the number of sperm in one ejaculation

为达到自主受精，一次射精的精子数量至少必须达到

Based on the experience and methods summed up by other researchers, the technique of cell culture was employed to study bovine follicular oocytes maturation, fertilization and the development of earlier embryo in vitro. The objective of this research is to upbuild and perfect a set of high-and-new-tech systems to obtain high-yield and high-quality bovine embryo, to provide technical operational regulations and ways and means to embryo engineering in practical production, to accumulate data for theoretical research.

本研究在总结前人研究的基础上，应用体外培养技术对牛卵母细胞体外成熟、体外受精及早期胚胎体外发育作了进一步研究，旨在建立健全一套完整的体外生产高产优质牛胚胎的高新技术体系，为胚胎工程和生产实践提供技术操作规程和方法，为理论研究积累资料。

Among the technologies recommended for these soils are: lime associated with gypsum for a deeper root system, P-fertilization with thermophosphate and the use of sugar mill by-products like vinasse, filter cake and bagasse, as source of organic matter and some essential plant nutrients.

这些土壤上推荐使用的技术措施有：石灰与石膏同时施用以加深根系，热法磷酸盐作磷肥，并使用酒糟、滤饼和蔗渣等糖厂副产品作为有机质和必需养分来源。

Aeration method was used to study the influence of different modes of fertilization on soil NH3 volatilization on corn farmlands.

采用通气法进行不同秸秆还田方式、施肥时期和方法对春玉米农田土壤氨挥发影响的研究。

Wapiti sperm capacitation in vitro and its ultrastructural change were studied in order to choose a set of perfect and feasible protocol of wapiti sperm capacitation in vitro, and to provide a basis data on the research of wapiti capatitation in vitro and the mechanism of fertilization.

本研究以马鹿为试验对象，开展了对鹿精子体外获能以及获能前后精子超微结构变化的研究，以期筛选出在实践中具有可操作性且效果良好的马鹿精子获能培养体系，从而为鹿体外受精和受精机理的研究奠定基础。

In the numerous extension patterns, the government leading extension pattern is the strongest, quicker, and the extension area is larger, but the extension system should be further strengthened, and the policy supports should be given by the government. The extension pattern with the research institutes as the main body is strict and scientific, and is welcomed by the peasants, but the extension strength is weak. The extension pattern with the companies as the main body has the advantage in the extension area, and is a new pattern, but the service consciousness of the agricultural fertilization should be strengthened. The extension pattern with the supply and marketing cooperative as the main body has the advantage of retailing fertilizers, but the technical training to the vocational staff should be strengthened. In the extension pattern with the chain radiation as the main body, the activity of the peasants is higher.

研究表明，在众多的推广模式中，政府主导型推广模式的推广力度最大，推广速度较快，推广面积也较大，但是推广体系应进一步强化，政府应给予政策上支持；以科研单位为主体的推广模式严谨、科学，受到农民的欢迎，但推广力度小；以公司为主体的推广模式在推广面积上有一定优势，是一支新生力量，但应强化农化服务意识；以供销社为主体的推广模式具有分销肥料的优势，但应对该系统的业务人员加强技术培训；以连锁辐射为主体的推广模式中，农民积极性高；以科研+公司+推广+农户为主体的(来源：ABC论文5b网www.abclunwen.com)推广模式在推广面积、农民的积极性均有一定优势，它能把几大部门的利益集中在一起，取长补短，以共同促进平衡施肥的发展。

However, zona hardening could occur during in vitro maturation of oocytes in a simply defined medium which reduced the fertilization rate.

采用无蛋白培养基对卵母细胞进行体外成熟培养，并防止透明带硬化，是研究影响卵母细胞成熟过程因素的基础。

Formed after fertilization of the zygote became twice as.

受精后形成的合子又成为二倍的。

E. Matteuccia struthiopteris Todaro, Aegopodium alpestre, Taraxacum mongolicum and Allium macrostemon in Dark Brown Forest Soil, using Na2SeO3 for fertilization, varying in application rate from Se 0.10 to 10.00 mg kg^(-1), directly into the top 15 cm soil layer.

硒肥种类为亚硒酸钠，施硒量为0.10~10.00mg kg^(-1)，直接施肥范围为0~15cm表土。

The effects of low level N、P、K on seedling height and ground diameter of Agathis dammara were better than high levels. The treatment N1P1K1 namely urea 2.2 grams, fused calcium-magnesium phosphate fertilizer 16.6 grams, potassium chloride 1.7 grams showed the best fertilization and high significant to other treatments.

结果表明，1~8个月不同处理间都呈极显著差异，低水平的营养元素对促进贝壳杉苗高和地径的生长好于高水平，以N1P1K1处理即尿素2.2g，钙镁磷肥16.6g，氯化钾1.7g为施肥效果最好，且与其它处理呈极显著差异。

That snake Alaric named Archbishop...

庇护。。。那个毒如蛇蝎的Alaric被命名为大教主。。。

You have done lots of magical things to be amazed at.

你做了很多神奇的事物感到惊讶。