浅谈我国的马鹿饲养业及发展目标   总被引：2，自引：1，他引：1  

郑兴涛  魏海军  贾庆艾  赵列平 《经济动物学报》2003,7(4):54-58

综述了我国北方 14省市自治区形成我国马鹿饲养业的人工选育品种及地方品种等 10种马鹿的数量分布、饲养方式、经营体制、繁育体系、饲养模式及其数量规模 ;典型的 6种马鹿的突出优良性状及品质评定 ;饲养马鹿产品的国内外市场及发展趋势 ;并从 6个方面阐述了中国马鹿饲养业的发展目标。  相似文献   

Herd characteristics influence farmers’ preferences for trait improvements in Danish Red and Danish Jersey cows     

M. Slagboom  M. Kargo  D. Edwards  A. C. Sørensen  J. R. Thomasen  L. Hjortø 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2016,66(3):177-182

The aim of this study was to characterize preferences of farmers for breeding goal traits with Danish Red (DR) or Danish Jersey (DJ) cows. A breed-specific survey was established to characterize farmers’ preferences for improvements in 10 traits, by means of pairwise rankings using the online software 1000Minds. These pairwise rankings were based on equal economic worth of trait improvements. The DR survey was filled in by 87 farmers and the DJ survey by 76 farmers. Both DR and DJ farmers gave the highest preference to improvements in mastitis, and the lowest to calving difficulty. By means of a cluster analysis, three distinct clusters of farmers were identified per breed. Comparisons of herd characteristics between clusters suggest that farmers choose to improve traits that are problematic in their herds. This study shows that heterogeneity exists in farmers’ preferences for trait improvements and that herd characteristics influence these preferences in DR and DJ.  相似文献   

促使学生参与自我评价与目标设定——完善学生档案袋在形成性评价中的作用     

孙洁 《安徽农业大学学报》2010,(1):119-121

学生档案袋受到人们越来越多的关注。但作为自我评价的主体，学生并不能积极充分地参与到自我评价和目标设定中去，从而使其所具有的形成性评价的功能受到了限制。文章探讨了教师在促进学生主动参与自我评价和目标设定中所发挥的作用及可采取的措施。  相似文献   

基于工程目标训练的金工实习教学实践探索     

廖凯  李立君  胡劲松  魏德强 《湖南农机》2012,(9):162-163

针对我国高等工科院校培养的毕业生普遍存在工程实践训练(金工实习)不足,实践能力和创新能力不够的问题,借鉴国外"大工程"教育观和工程科技人才培养模式,紧密结合未来创新型、综合型、工程型高素质科技人才所需要的能力素质,在高校中探索以工程目标为教学导向的实习教学模式,为工科学生提供逼真的工程实训模式。  相似文献   

农林经济管理专业教学改革的思考   总被引：1，自引：0，他引：1  

于战平 《天津农学院学报》2003,10(Z1):21-23

结合农林经济管理本科专业人才培养目标定位和实现目标定位的现实矛盾分析,从课程设置、教学内容、教学方法等方面提出了改革的具体建议.  相似文献   

目标规划与轮伐公式确定森林收获的比较分析   总被引：1，自引：0，他引：1       下载免费PDF全文

李婷婷  陆元昌  刘宪钊  王霞  庞丽峰 《林业科学研究》2014,27(1):38-44

利用中国林科院热带林业实验研究中心2009年森林资源二类调查数据,分别利用目标线性规划与传统森林轮伐公式计算热林中心马尾松纯林和杉木纯林用材林年采伐量,比较分析同一个经理期（2009—2019年）两种计算方法的不同;结果表明：轮伐公式计算的采伐量一般偏大,且目标规划单位面积年经济收益是轮伐公式获得经济效益的10 20倍。利用目标规划法在同时实现材积收获量最大、出材量最大、净现值收益最大的目标前提下,对森林结构进行调整,使资源分布满足可持续经营的要求,即尽可能达到法正状态。  相似文献   

基于目标分析法及熵权法的后农业税时代农地政策评价     

何宏泽  张仁陟  陈英 《黑龙江农业科学》2010,(6):124-128

在详细介绍目标分析法评价农地政策的方法特点及步骤的基础上,对后农业税时代甘肃省河西4市的农地政策进行了评价。结果表明:从横向比较来看,在4个城市中酒泉市农地政策目标的实现程度最高,明显优于张掖市和武威市;以2003年的综合指数为参照值进行纵向比较,武威市的综合指数呈逐年递增趋势,张掖市的综合指数总体上呈逐年递增趋势(2005年的综合指数是一个例外),酒泉市的综合指数也总体上呈逐年递增趋势(2006年的综合指数是一个例外),而金昌市的各年度综合指数有所反复,呈不稳定状态。  相似文献   

基于高职教育的《药用植物学》课程目标研究     

邵世光 《安徽农业科学》2010,38(18):9880-9881

在介绍高职教育课程标准的价值取向及确定课程目标的依据的基础上,提出了《药用植物学》课程目标及其实现途径。  相似文献   

Efficiently mapping an appropriate thinning schedule for optimum carbon sequestration: An application of multi-segment goal programming     

Ying-Ta ChenChinlong Zheng  Ching-Ter Chang 《Forest Ecology and Management》2011,262(7):1168-1173

Thinning is an important strategy for carbon sequestration in forest management. Linear programming (LP) and goal programming (GP) can only set fixed parameters for the left hand side constraints, which are incapable of simulating different thinning intensities at thinned stands to map an appropriate thinning schedule for optimum carbon sequestration efficiently. However, multi-segment goal programming (MSGP) with the flexibility to set multi-level parameters can be applied by forest managers to quickly choose an appropriate level from different thinning intensities.The purpose of this study was to combine MSGP with LP to efficiently adopt thinned area and thinning intensity together as decision variables. In a demonstrated case, an appropriate thinning schedule for three age-classes was chosen from 768 combinations of thinning intensity in just one step. Each age-class was allocated well such as practicing medium thinning intensity on young age-class and strong thinning intensity on the old age-class. Totally 1379643.03 tons of carbon sequestration was obtained after two planning horizons, which was 34.75% higher than no thinning. Besides, a stable supply of wood form thinning is made for carbon sequestration in each period and the stocking of each age-class is also improved.  相似文献   

Analysis on Unbalance of Real Estate Investment Goal under the Environment of High Profit Margin          下载免费PDF全文

HAN Guo - bo  YU Xiao - dong  MA Jing - hua 《保鲜与加工》2007,(1):114-116

With incessant development of Chinese real estate market, the amount and size of real estate corporations are enlarging rapidly and the real estate corporation investment goal is tending to become divertive. So it is especially important to understand rightly the investment goal of the real estate corporations. This paper analyzes the unbalance phenomena of real estate corporation investment under the environment of high profit margin and discusses the serious aftereffect from this unbalance. Finally this paper brings forward the right order of investment goals for the real estate corporations in order to contribute to a nicer performance of real estate corporations in establishing sustainable development stratagem.  相似文献