龙园红1号大白菜的推广及经济效益分析

龙园红1号是黑龙江省农业科学院园艺分院育成的大白菜杂种一代新品种,2006年通过黑龙江省农作物品种审定委员会审定.该品种叶球切开后,心叶金黄色,见光后转为桔红色,胡萝卜素和维生素C的含量明显高于普通的白色品种,颜色鲜艳,味道鲜美.通过2005、2006两年的推广试种,龙园红1号大白菜的产值约为普通大白菜的6～10倍,较普通大白菜增收5 000～7 000元/667m2,经济效益明显.在今后的蔬菜新品种推广中,应以品种的品质和花样来赢得市场,要想获得高效益,还应该在产品的销售方式上有所创新.     

牛的体外受精技术研究进展

本文阐述了体外受精技术在牛胚胎工程和育种研究中的意义，介绍了牛体外受精技术的研究历史和目前的研究进展，对牛体外受精技术的技术指标现状及经济效益进行了评估，并就牛的体外受精技术当前研究存在的问题作了评述，对其前景做了展望。     

东北平原引草信信入田、粮草轮作的初步研究

在吉林省长岭县和农安县通过田间试验研究了东北平原区主要粮食、牧草及经济作物轮作对土壤养分状况、土壤酶活性、土壤微生物组成和数量以及主要粮食、牧草及经济作物生物产量的影响。结果表明，豆科牧草对提高土壤有效养分水平有显著作用。大豆对土壤有效氮的影响较大，但对有效磷、有效钾的影响不如玉米，而马铃薯、烟草和向日葵等经济作物则对土壤养分的消耗较多，容易造成土壤养分单项缺失，不宜连作。此外，豆科牧草茬口的酶活性指标及其生物产量均优于其他供试作物。粮食-牧草-经济作物三元轮作体系是提高东北平原区土壤肥力，获得良好的生态效益和经济效益的有效途径。     

试论畜牧科技企业的发展和思考

畜牧科技企业既要将知识转化为技术,又要将技术转化为产业;决定其胜负的竞争力是核心技术,评价的标准一是技术的技术性,再一是技术的市场性;有效经营管理要有正确的经营策略和合理利润;本文还对产量、成本、盈利之间的关系进行了探讨.     

Breeding objectives for the Boran breed in Kenya: Model development and application to pasture-based production systems

Bio‐economic profit models were developed and applied to evaluate biological and economic variables that characterize production systems utilizing the Boran breed. Production systems were described according to their sale age (24 months short‐fed or 36 months long‐fed), levels of input (low, medium or high) and final goal (beef or dual purpose) representing practical circumstances that exist in the various beef cattle farms in Kenya. The input variables were classified into production and economic variables. The outputs from the profit models included revenue, costs and feed intake of cows, heifers and steers in the different production systems. These models can be used to simulate changes in production and marketing circumstances. The biological relationships and assumptions in the model are general and flexible and can therefore be applied to a wide range of beef cattle production circumstances by changing the input variables. In addition, by modifying the herd dynamics and management variables this model may be applied in Kenya or other countries to production systems that utilize indigenous cattle genetic resources or their crosses with Bos taurus breeds.     

木工机械行业的顾客满意度测评体系初探

根据木工机械行业的竞争态势,推行新的营销策略势在必行.如何提高顾客满意度是推行服务营销策略的关键,顾客满意度模型是实施顾客满意度评估体系的核心工具.通过对木工机械的行业背景、产品特性、顾客特点等因素进行研究分析,提取相应的客户满意指标作为满意度模型的设计因子,建立木工机械行业的顾客满意度模型及合理可行的测评体系,从而对顾客在营销过程中的满意度进行监控和反馈,依此来制订或修正相应的营销策略,最终达到提高企业竞争力的目的.     

浅析家兔繁殖率低的原因

高繁殖性是家兔养殖利润来源的根本。因此对于影响其繁殖的因数就是影响养兔养殖成败的关键因数,那么家兔养殖过程中我们就应该多注意影响繁殖的因数,努力克服,并创造适当条件满足养兔繁殖需要,以达到利润的最大化。     

The Ecological Effects of Young Elm Trees Belt-Pumpkin Strip Intercropping System at the Agro-Pastoral Ecotone in Northern China

Young elm trees belt-pumpkin strip intercropping was studied to solve the actual problem of resource losses in the large barren area resulted from reconverting cultivated land into forest in the agro-pastoral ecotone in northern China. The final objective was to realize effective utilization of the barren land with both ecological improvement and economic development. Field experiments were conducted together with laboratory analysis. The results indicated that the soil moisture level was remarkably increased in young elm trees belt-pumpkin strip intereropping because the pumpkin vines covered the gap between pumpkin planting-furrow and elm trees belt. The water use efficiency of the intercropping system was increased by 23.7-163.3% as compared with the single cropping. Elm trees belt-pumpkin strip intercropping changed the sequential succession trend of the grasses growing in the gap of the pumpkin planting-furrow. The annual grasses become the dominant vegetation. The nutritive value as fodder and yield of the annual grasses were also increased remarkably. The biomass of pumpkin, elm trees and grasses under intercropping increased by 24.4, 28.4 and 144.4%, respectively, as compared with those under single cropping. The land use efficiency was increased by 132%. It was also indicated that the soil erosion from the intercropping land was not increased due to pumpkin plantation. The differences in the soil erosion among intercropped area, elm trees belt and pumpkin strip with single cropping were not remarkable. Therefore, it was concluded that young elm trees belt-pumpkin strip intercropping is an effective way to utilize the barren land between the young elm trees belt and realize synergistic enhancement of ecological benefit and economic profit.     

基于理想点法的灌区多目标种植结构优化模式研究

建立了灌区多目标种植结构优化模型:以灌区作物受益最优和耗水量最小为目标函数,以不同作物种植面积和生育期内可供水量为约束条件,采用理想点法对灌区不同作物种植面积进行优化。结果表明,灌区种植结构应当随着降雨年型不同、灌区可用水量变化而调整,在减小灌溉用水量的同时获取最大收益,该规划方法可为灌区种植结构优化决策提供参考。     

“草-牧-沼-蔬”循环农业模式的经济效益分析

介绍了"草-牧-沼-蔬"循环农业模式,初步分析了这一模式各个环节的经济效益。结果表明,在2011-2012年两年间,"草-牧-沼-蔬"循环农业模式取得了良好的经济效益及生态效益。建议通过政府补贴或农企共同合作发展有助于发展循环农业,降低运行成本及其市场风险。