The carcass weight continuously increases with increase of population age.
不同年龄组繁殖力差异显著,胴体重随种群年龄的增长而不断增加,各年龄组胴体重与体重、体长、尾长均呈正相关性,且与体重相关性达极显著。
Based on calving records(1984-1995)of Holstein-Friesian maintained at one of dairy cattle places in XiNing, used the method of statistieal analysis sex of calf of different breeding age ,parity and breeding month.
根据西宁某奶牛场1984-1995年荷斯坦奶牛的配种产犊记录,按不同配种年龄、胎次与配种月份所产犊的性别进行统计分析。
The results show that the difference is large according to the residents age-levels and the exercise region choices.
结果表明社区居民的健康意识与活动意识较强,社区居民的年龄层次与健身地域的选择差距较大,现有的社区体育场所、设施基本上可满足老年人的健身需求;但体育场所单一、设施损坏严重、专业健康指导员缺乏的现状,不能满足中年和青少年居民的健康消费要求。
Research on Population Age of Eothenomys melanogaster
黑腹绒鼠(Eothenomys melanogaster)种群年龄的研究
STUDY ON THE DIVISION OF AGE GROUP AND THE AGE COMPOSITION OF POPULATION OF STRIPED HAMSTER IN BEIJING AREA
北京地区黑线仓鼠年龄鉴定及种群年龄组成的研究
Study on Otoliths Microstructure of Tanichthys Albonubes and Research on Age Structure of Wild Tanichthys Albonubes;
唐鱼耳石微结构研究及自然种群年龄结构调查
Study on Population Age Structure and Spatial Distribution Pattern of Dryopteris Crassirhizoma Nakai;
粗茎鳞毛蕨种群年龄结构与空间分布格局研究
Differentiation of population age groups of captive alpine musk deer(Moschus chrysogaster) based on the visible-near infrared reflectance spectra of their feces
圈养高山麝种群年龄组的粪便光谱判别
Study on population age of Tscherskia triton in Shunyi district, Beijing
北京市顺义地区大仓鼠种群年龄的研究
Age-structure and reproduction investigation on Niviventer confucianus living on islands at Qiandao Lake in autumn
千岛湖秋季社鼠种群年龄结构及繁殖状况初探
Study on the Age Structure of Ulmus pumila L.var.Sabulosa Population in Hunshandake Sand Land
浑善达克沙地沙地榆种群年龄结构研究
Study on Seed Rain, Soil Seed Bank and Population Age Structure Characteristics in Natural Communities of Taxus Chinensis Var. Mairei
南方红豆杉天然群落种子雨、土壤种子库及种群年龄结构特征的研究
A PRELIMINARY STUDY ON THE AGE STRUCTURE AND DISTRIBUTION PATTERN OF MASSON PINE POPULATION ON THE JINYUN MOUNTAIN, SICHUAN PROV., CHINA
缙云山马尾松种群年龄结构和分布格局的初步研究(英文)
Age structure is a foundational base to study the population dynamics.
年龄结构是研究种群动态的重要基础。
Numerical Approximate Scheme for Stochastic Age-dependent Population Equations
一类与年龄相关的种群系统的数值解
The first people immunlized with inactivated vaccine against HFRS was 30～39 age group and the next peoples were 40～49 age and 20～29 age group;
30～39岁年龄组，其次是40～49岁和20～29岁年龄组是首选接种人群；
Application of Life-Table to the Study of Age Structure of Mongolian Oak Population
应用生命表对蒙古栎种群的年龄结构的研究
Optimal Control in Non-Linear Population Diffusion System with Age-Dependence;
与年龄相关的非线性种群扩散系统的最优控制
Bistable Waves for a Single Species Model with Age Structure in 2-Dimension Lattice;
二维格上年龄结构单种群模型双稳行波解
Optimal Harvest Model for Single Species Grouped by Years;
具有年龄结构的单种群最优捕获策略模型研究
Numerical Method for an Age-dependent Model of Single Species Population Dynamics;
年龄相关的单一种群动态模型数值解法