全混合日粮搅拌机饲料混合均匀度检测方法探讨

全混合日粮搅拌机是实现全混合日粮饲养技术的机械设备,但目前该搅拌机的饲料混合均匀度指标缺乏适宜的检测方法.分析现有饲料混合均匀度检测方法在检测全混合日粮时存在的问题,提出针对全混合日粮搅拌机饲料混合均匀度的检测方法.     

全混合日粮搅拌机的性能分析与评价

分别对卧式和立式两类全混合日粮(TMR)搅拌机的性能进行了深入的分析与论述,并且运用美国宾夕法尼亚大学制定的筛分标准对全混合日粮搅拌机的混合性能和日粮颗粒大小分布的合理性进行了科学分析与评价,为正确选择和使用全混合日粮(TMR)搅拌机提供一定的参考依据.     

卧式饲料混合搅拌机混合原理及其搅龙参数的设计

通过研究卧式双搅龙饲料混合搅拌机的结构、特点及其混合原理,分析了物料在混合机内产生的混合、剪切、揉搓及对流运动,提出一种适用于肉羊全混合日粮的加工制作设备,能够将各种精、粗饲料按照一定的比例配方混合搅拌均匀,从而提高饲料营养均衡性及适口性。运用Solidorks对卧式双搅龙饲料混合搅拌机相关部件建模,特别对其核心部件—双螺旋搅龙结构参数进行设计及理论分析。整机性能实验结果表明,该机混料均匀度为91.1%,投料稳定性93.4%,主要性能指标达到设计要求。     

卧式三搅龙全混日粮搅拌机的使用与维护

一、全混日粮搅拌机用途全混日粮搅拌机主要用于奶牛、肉牛全混合日粮（TMR）加工制作。能够将各种精、粗饲料按照一定的配方比例混合搅拌均匀,提高饲料的适口性和营养的均衡性,并能明显降低饲料成本。二、构造及工作原理卧式三搅龙全混日粮搅拌机是应用最广的一种全混日粮生产设备,主要由搅拌室、搅龙、传动机构、     

9JLT-10全混日粮搅拌机及搅龙设计

全混日粮搅拌机主要用于奶牛、肉牛全混合日粮(TMR)加工制作的专用设备,能够将各种精、粗饲料按照一定的配方比例混合搅拌均匀,提高饲料的适口性和营养的均衡性.为此,应用CAD和SolidWorks对9JLT-10 TMR饲料搅拌机下搅龙进行辅助设计,对搅龙强度进行COSMOS力分析;同时,对搅拌机整体装配进行仿真优化设计,以提高TMR饲料搅拌车整机性能,减少整机设计周期.     

全混合日粮搅拌机在阿勒泰地区的使用效果分析

文中阐述了阿勒泰地区畜牧业规模化养殖对一体化新型饲草加工调制机具的需求,对引进的立式和卧式TMR全混合日粮搅拌机的技术性能、作业特点、使用效果及效益进行了分析,为进一步推广应用全混合日粮搅拌机提出建议。     

全混合日粮(TMR)搅拌机的种类与应用

对全混合日粮(TMR)搅拌机的种类、结构形式、性能特点及应用过程中的技术要点、注意事项进行了深入的分析与评价,以期为广大牛场在采用全混合日粮(TMR)这一先进的饲喂方式时能够正确选择和使用全混合日粮(TMR)搅拌机提供一定的参考依据。     

三轴立式TMR搅拌机的设计及有限元分析

目前,奶牛养殖行业主要以TMR(全混合日粮)技术进行奶牛饲养,而搅拌机是主要的饲料混合加工设备。为此,针对新疆地区奶牛规模化养殖人工成本高和饲料人工混合周期长等问题,设计了一种适用于奶牛TMR的三轴立式搅拌机,确定了搅拌机的料筒和螺旋叶片的具体参数,并通过计算得到了搅龙的最小临界转速为87r/min,最大临界转速为172r/min。运用Abaqus软件对搅拌机核心部件进行有限元分析,得到了搅龙应力应变云图和前6阶振,结果表明:该装置设计合理,可满足使用需求。     

牵引型立式饲料混合搅拌机的设计

以奶牛饲料混合设备为研究对象,分析了立式饲料搅拌机的物料混合原理,设计了一种牵引式饲料搅拌样机,并进行了物料混合加工试验研究,确定了锥形搅龙、锥形搅龙加装动刀片对物料混合均匀度的影响规律。     

奶牛全混合日粮(TMR)技术及设备

本文对奶牛全混合日粮(TMR)技术的概念、发展、技术工艺路线、技术要点及其所使用的关键设备全混合日粮(TMR)搅拌机进行了阐述。     

Overland water and salt flows in a set of rice paddies

Cultivation of paddy rice in semiarid areas of the world faces problems related to water scarcity. This paper aims at characterizing water use in a set of paddies located in the central Ebro basin of Spain using experimentation and computer simulation. A commercial field with six interconnected paddies, with a total area of 5.31 ha, was instrumented to measure discharge and water quality at the inflow and at the runoff outlet. The soil was classified as a Typic Calcixerept, and was characterized by a mild salinity (2.5 dS m⁻¹) and an infiltration rate of 5.8 mm day⁻¹. The evolution of flow depth at all paddies was recorded. Data from the 2002 rice-growing season was elaborated using a mass balance approach to estimate the infiltration rate and the evolution of discharge between paddies. Seasonal crop evapotranspiration, estimated with the surface renewal method, was 731 mm (5.1 mm day⁻¹), very similar to that of other summer cereals grown in the area, like corn. The irrigation input was 1874 mm, deep percolation was 830 mm and surface runoff was 372 mm. Irrigation efficiency was estimated as 41%. The quality of surface runoff water was slightly degraded due to evapoconcentration and to the contact with the soil. During the period 2001–2003, the electrical conductivity of surface runoff water was 54% higher than that of irrigation water. However, the runoff water was suitable for irrigation. A mechanistic mass balance model of inter-paddy water flow permitted to conclude that improvements in irrigation efficiency cannot be easily obtained in the experimental conditions. Since deep percolation losses more than double surface runoff losses, a reduction in irrigation discharge would not have much room for efficiency improvement. Simulations also showed that rice irrigation performance was not negatively affected by the fluctuating inflow hydrograph. These hydrographs are typical of turnouts located at the tail end of tertiary irrigation ditches. In fact, these are the sites where rice has been historically cultivated in the study area, since local soils are often saline-sodic and can only grow paddy rice taking advantage of the low salinity of the irrigation water. The low infiltration rate characteristic of these saline-sodic soils (an experimental value of 3.2 mm day⁻¹ was obtained) combined with a reduced irrigation discharge resulted in a simulated irrigation efficiency of 60%. Paddy rice irrigation efficiency can attain reasonable values in the local saline-sodic soils, where the infiltration rate is clearly smaller than the average daily rice evapotranspiration.     

瓦房店市水果生产标准化发展研究

瓦房店市是我国重要的水果生产基地,在国内水果生产领域占有重要地位。随着水果市场化的不断深入,如何满足和适应国内外市场需求成为瓦房店市水果生产的关键问题。从瓦房店市水果生产实际出发,阐述了实施水果生产标准化的必要性,提出了发展水果生产标准化的具体措施。     

金谷子耐旱TG118引种试种及推广应用

对引进的谷子新品种金谷子耐旱TG118进行品种比较试验和多点试种。结果表明：该品种抗旱、耐瘠、适应性强,稳产、高产、抗病抗风抗倒伏强,品质优良,粮草兼用,种植简单,省工易管;一般产量在6000kg/hm2以上,比当地主栽品种增产20%以上。最高产量达9450kg/hm2,适于在辽西北地区推广应用。     

对《种子法》存在问题的探讨

《种子法》是我国种植业第一部法律。自实施以来,为依法加强种子管理提供了有力的法律支撑,促进我国种子产业发生翻天覆地的变化。但随着依法管理工作的深入和种子产业的快速发展,《种子法》及配套规章的一些问题逐步显现出来。对《种子法》及配套规章存在的问题进行深入分析,对需要进一步补充的章节以及需要调整的内容进行深入探讨,以求更加完善和明确。     

Review of the Egyptian experience in implementing land drainage projects

About 30 years have passed since the Government of Egypt embarked on implementing a series of large scale drainage projects. At present, about 3.8 million acres have been provided with drainage systems on the basis of systematic pre-drainage investigations and designs. The target is to provide drains in approximately 6.4 million acres in the Nile Valley and Delta.The implementation of the subsurface drainage system is carried out by the public sector and private contractors under direct supervision of governmental regional departments. The implementation process depends on many factors related to the drainage material, machinery, manpower, site requirements, farmers and organizations involved. Problems and constraints are sometimes challenging, however, the annual rate of implementation has gradually increased to 170,000 acre/year.This paper discusses the different aspects involved in the implementation process of drainage systems. The development in materials, machinery and construction technologies will be reviewed. Institutional and management factors are going to be also considered.     

和谐社会理论建设的几点哲学思考

在新世纪,面对机遇和挑战,党的十六大把“社会更加和谐”作为全面建设更高水平的小康社会的一个重要目标。中国人素有社会和谐的理想;西方人自古也向往社会和谐;借鉴东西方两种和谐社会思想的经验、教训,构建社会主义和谐社会理论。     

A European irrigation map for spatially distributed agricultural modelling

We present a pan-European irrigation map based on regional European statistics, a European land use map and a global irrigation map. The map provides spatial information on the distribution of irrigated areas per crop type which allows determining irrigated areas at the level of spatial modelling units. The map is a requirement for a European scale assessment of the impacts of irrigated agriculture on water resources based on spatially distributed modelling of crop growth and water balance. The irrigation map was compiled in a two step procedure. First, irrigated areas were distributed to potentially irrigated crops at a regional level (European statistical regions NUTS3), combining Farm Structure Survey (FSS) data on irrigated area, crop-specific irrigated area for crops whenever available, and total crop area. Second, crop-specific irrigated area was distributed within each statistical region based on the crop distribution given in our land use map. A global map of irrigated areas with a 5′ resolution was used to further constrain the distribution within each NUTS3 based on the density of irrigated areas. The constrained distribution of irrigated areas as taken from statistics to a high resolution dataset enables us to estimate irrigated areas for various spatial entities, including administrative, natural and artificial units, providing a reasonable input scenario for large-scale distributed modelling applications. The dataset bridges a gap between global datasets and detailed regional data on the distribution of irrigated areas and provides information for various assessments and modelling applications.     

粉质仪和拉伸仪在面粉生产中的应用

在介绍粉质仪和拉伸仪结构和原理的基础上,探讨了粉质曲线中吸水率、形成时间、稳定时间、弱化度和评价值等指标与面粉品质的关系,以及如何根据拉伸曲线中面团最大拉伸阻力、延伸度和拉伸曲线面积等指标来评价面团品质,并结合生产实际,概述了粉质仪和拉伸仪在面粉生产中的作用。     

农村信息化服务的现状及建设措施

分析当前我国农村信息化服务的现状,提出加强农村信息化服务的新举措。     

车辆ABS控制算法的研究及探讨

对现代汽车的ABS控制算法作了一些简单的介绍,同时指出了它们的一些缺陷,相应地提出了几种对ABS的其它控制方法并加以探讨,其中着重论述了ABS门限值控制算法中参考车速的确定方法和基于附着系数的控制算法。