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A Review of Livestock Population Structure Management Research 畜群结构管理研究进展
livestock population structure 畜群结构
In 2000 the human / livestock population of Qinghai province was? 在2000年,青海省人口/牲畜的数量是多少?
Thirdly, man-made grassland is being promoted so as to ease the pressure brought to bear on natural grassland by the ever-growing livestock population. 三是建设人工草地，减轻牲畜数量增加对自然草地的压力；
Population structure and dynamics of Larix chinenesis in Qinling Mountain. 秦岭太白红杉种群结构与动态的研究。
Thirdly,man-made grassland is being promoted so as to ease the pressure brought to bear on natural grassland by the ever-growing livestock population. 三是建设人工草地，减轻牲畜数量增加对自然草地的压力。
The mining towns of Western Canada were often ephemeral and their population structure was dominated by transient male workers of many nationalities. 摘要加拿大西部的煤矿城市经常是短暂的，他们的人口结构主要是由许多国家流动性的男性矿工所组成。
Goldscheider C.. 1992.Migration, Population Structure and Redistribution Policies.Boulder, CO: Westview Press. 张善余.;我国省际人口迁移模式的重大变化
Teenage girls are an important component part of a nation's population structure. 摘要女童是一个国家人口结构中重要的组成部分。
It means converting highly erodible cropland back to grassland or woodland, reducing the livestock population, and planting tree shelter belts across the windswept areas of cropland, as U. 也就是说，必须把容易造成土壤冲刷流失的耕地，复育为原本的草原和森林，并降低牲畜的饲养量，以及在耕地周边栽种防风林，减少风的侵蚀。
In the past, developing countries have coped with the increases in demand mainly by expanding livestock populations. 以前,发展中国家应对需求的增长是扩大家畜数量。
The zokor population structure was influenced by understory plants through the impact on individual amount of sub-adult. 林下草本植物主要通过影响亚成年组数量而导致鼢鼠种群结构的变化。
Factors,such as wave action,ice scouring and even the bio-harvest,may have modified population structure as well as shell morphology. 菲尔德斯东、西海岸环境因子,如风浪、冰块冲击作用以至生物捕食产生的环境压力,不仅作用于种群个体的生长状态,而且也作用于种群结构。
The population structure of H. miconioides was analyzed at genet and ramet levels, respectively, in Dapan Mountain of Zhejiang Province. 以浙江大盘山七子花为对象，从基株和无性系分株2个层次上进行种群结构研究。
The pairwise FST values between areas were very low, this indicated that no significant population structure in Chinese wild boars. 4、基于微卫星位点变异对中国大陆地区不同区域的野猪群体进行了种群结构及种群动态进行了分析。
Variation of culturable microbial population structure and essential soil enzyme activities were investigated with continuous cucumber cropping. 摘要利用平板培养法对黄瓜连作根系微生物种群连续性变化进行了跟踪研究。
The population structure of the main species in the community. White, bias and black indicate living stems, sprouting stems and dead stems, respectively. 群落主要种的种群径级结构白色表示活体,斜纹表示萌枝,黑色表示枯死个体。
Foot-and-mouth disease spreads quickly through livestock populations, making it difficult for dairy cows to produce milk and prompting weight loss in other animals. It is very painful for animals. 口蹄疫在牲畜群体中传播速度极快。染病的奶牛不能产奶,牲畜体重下降,非常痛苦。
Please talk the influence on Chinese economics from the points of population structure, labor force supply, requirements of green GDP and the construction of harmonious society. 请从人口结构、劳动力供给、绿色GDP要求、和谐社会建设等角度出发,谈一谈对中国经济发展的影响。
The effect of QTL mapping was influenced by many factors including population structure and size, number of QTLs, density of genetic markers, heritability of traits etc. 影响QTL 定位效果的因素很多,包括群体类型、规模、涉及的QTL 数目、遗传标记的密度、性状遗传力等等,特别是分析中使用的遗传和统计模型对QTL 检测和定位有较大的影响。