多功能花生剥壳玉米脱粒机面市

一种设计独特,性能稳定、使用安全方便的多功能花生剥壳玉米脱粒机,已由江苏省新沂华卫科研开发部研制成功,并批量生产和投放市场。 这种花生剥壳和玉米脱粒两用机械,重54公斤,使用照明电,     

自动行进式新型玉米脱粒机设计

针对当前使用的玉米脱粒机自动化水平低的问题,提出了一种新的自动化程度较高的玉米脱粒机。其主要创新点在于自动行进装置,该装置主要由电气控制电路、减速电机、电动轮子、方向操纵杆和机架等部分组成。新型玉米脱粒机由两套电机系统分别驱动,以实现脱粒机自动行走和脱粒两大功能。新型玉米脱粒机具有结构简单、自动化程度较高、标准化程度高、操作简便、适用范围广的特点,市场推广前景广阔。     

玉米脱粒机常见故障快速维修

正玉米脱粒机,由于其具有安装操作简便、生产效率高、安全性能高等诸多优点,在玉米生产作业中被广泛使用。虽然脱粒机让更多的农民从玉米脱粒劳作中解脱出来,但是由于不能正确使用保养脱粒机,其所产生的一系列故障,也给农民造成了极大的困扰。因此,正确使用保养玉米脱粒机,并对故障进行有效调修,具有极其重要的现实意义。1脱粒不净     

一种玉米脱粒机的设计

玉米既是营养丰富的食物,也是良好的工业原料,传统的玉米脱粒采用的是钉齿滚筒方式,对玉米籽粒损伤大,国外已经淘汰该方法。文章分析比较了各类脱粒机的优缺点设计了一种新型的运用挤搓原理的板齿式玉米脱粒机,实验数据表明,该脱粒机的脱粒过程柔和,对子粒毁伤小,对增加农民的收入、促进我国的可持续发展有重要的意义。     

5TN-1型玉米对生种子脱粒机的设计

为满足玉米超高产栽培技术的需求,提高玉米对生种子的脱粒速度和效率,根据玉米对生种子的特殊生理习性,研究开发了5TN-1型玉米对生种子脱粒机。介绍玉米对生种子的脱粒原理,分析玉米对生种子脱粒机主要结构的设计思路,并对脱粒机的性能进行试验分析。试验结果表明,该机结构合理、性能可靠、适用范围广泛。     

5TN-1型玉米对生种子脱粒机的设计

为满足玉米超高产栽培技术的需求,提高玉米对生种子的脱粒速度和效率,根据玉米对生种子的特殊生理习性,研究开发了5TN-1型玉米对生种子脱粒机。介绍玉米对生种子的脱粒原理,分析玉米对生种子脱粒机主要结构的设计思路,并对脱粒机的性能进行试验分析。试验结果表明,该机结构合理、性能可靠、适用范围广泛。     

小型揉搓式玉米脱粒机的设计

为了降低农民在玉米脱粒时的劳动强度、提高工作效率,设计了玉米脱粒机。该机主要由入料口、栅格式凹板和板齿脱粒滚筒等组成。其特点是采用了挤搓脱粒技术,脱净率高、破碎率低,既适合普通玉米脱粒,也适合种子玉米脱粒。     

YT-1.5型小型玉米脱粒机设计

玉米这种经济价值极高的粮食作物近年在南方有较大发展，为此设计了一种小型玉米脱粒机。该机采用圆锥轴流滚筒脱粒结构，利用挤压、搓撕原理对玉米实施脱粒，离心风机进行清选。试验表明，YT-1．5型小型玉米脱粒机各项参数达到预期目标，脱净率高、破碎率低、经济性好，尤其适合南方小面积种植衣户使用。     

安全使用脱粒机10忌

目前,农村粮食脱粒,已多数使用上脱粒机,这虽然大大减轻了农民的劳动强度,加快了脱粒速度,但人身伤亡事故也时有发生。因此,要确保脱粒机使用安全,必须注意以下10忌: 1.忌保管不善。每季收获结束,脱粒机不再使用     

玉米脱粒机使用保养及故障维修

虽然脱粒机让更多的农民从玉米脱粒劳作中解脱出来,但是由于不能正确的使用保养,其所产生的一系列故障,也给农民造成了极大的困扰。因此,正确使用保养玉米脱粒机,并对故障进行有效调修,具有极其重要的现实意义。     

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。