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机械驱动式精密变量施肥播种机的研制 总被引:4,自引:0,他引:4
根据精准农业变量投入的技术要求,研制成功国产变量施肥播种机。该播种机由变量控制器控制机械式无级变速器,根据GPS的位置信号,完成处方图设计的播种施肥作业。通过对播种机的静止和地块工作试验可知,变量施肥控制可靠,变量数据记录正常,播种作业效果良好。 相似文献
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精准农业变量施肥GIS系统研究 总被引:2,自引:0,他引:2
为提高我国农业的科技含量和现代化水平,研究设计了精准农业变量施肥GIS系统,该系统在GPS的定位下,可实现控制大豆变量施肥播种机进行变量施肥播种作业。该软件由VisualBasic6.0语言、地理信息系统MapObjects控件和Microsoft公司串行通信MSComm控件进行编程,通过机载计算机对变量施肥机构进行控制。大豆大面积试验表明,可显著提高单位面积产量。 相似文献
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电控液压马达驱动控制器的研究 总被引:3,自引:1,他引:2
变量施肥技术是精准农业技术的重要组成部分。由于施肥机是通过液压马达驱动的,设计了相应驱动方式下的基于单片机的控制器,该控制器通过串口RS232接收来自田间计算机的控制命令,进行解析处理后生成相应的I/O口信号,经过驱动电路放大后控制执行元件动作。同时,控制器利用车速度传感器、排肥轴磁阻转速传感器通过采样获得排肥轴转速信息,反馈给控制器实现闭环控制。变量施肥试验表明,所设计的变量施肥控制器能满足变量作业的要求。 相似文献
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气吸式玉米播种机播种智能电控系统的设计 总被引:1,自引:0,他引:1
由于传统玉米播种机采用地轮驱动所有排种器同步工作,作业模式单一,地轮打滑影响播种质量。为提高播种机作业灵活性和播种质量,设计了气吸式玉米播种机播种智能电控系统。系统以微处理器为核心,采用光电编码器实时采集机车作业速度,通过直流电机驱动排种器,每个排种器独立工作,微处理器根据作业速度与设置的播种参数实时调节电机转速,完成按需播种。同时,系统还具有作业数据显示、存储及查询,播种单体的智能控制,故障监测报警等功能。实验结果表明,电控播种机播种粒距合格指数为95.9%,播量控制精度为98.18%。该系统实现了播种作业模式多样化,提高了播种效率和播种质量。 相似文献
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设计了大豆变量施肥播种机,该机具具有结构简单且坚固的特点,减少了拖拉机的动力输出。节约了油料,节省农业的资金投入。该机配备了先进的检测系统,避免了重播漏播现象。该机配备了国际先进的无级变速器等设备,可以根据作物生长的需要,调整施肥量,实现变量施肥,提高了作物的产量。实践表明,该播种机性能可靠,结构设计合理,符合农业生产的要求。 相似文献
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变量施肥控制系统设计 总被引:2,自引:1,他引:1
设计了以单片机为控制核心、液压马达为执行机构的变量施肥控制系统。该系统由单片机控制器、信号采集单元、液压传动控制组成,通过使用Visual Basic 6.0编程软件实现了GPS导航定位变量施肥工作模式,并对其进行了控制精度试验。 相似文献
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基于DGPS定位的大豆变量施肥播种应用试验 总被引:3,自引:0,他引:3
在黑龙江省友谊农场五分场二队2号地进行大豆变量施肥播种作业,作业机械使用美国CASE公司生产的大型空气式变量施肥播种机,作业前根据土壤养分化验结果建立起来的DGPS变量施肥处方图及友谊农场实际生产经验,采用AFS软件进行变量施肥播种决策,并将决策结果数据用于变量施肥播种作业,在同等成本条件下,比对照增产7.5%. 相似文献
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精准施肥技术的研究现状及在热带作物上的应用前景 总被引:1,自引:0,他引:1
精准施肥是当前农业发展的热点,而热带作物产业是我国农业体系的重要组成部分,是热区建设社会主义新农村的重要支撑产业。通过对精准施肥技术概念和研究现状的阐述,提出在我国热带作物产业发展中精准施肥技术的关键问题,并提出了无变量施肥设备的精准施肥。 相似文献
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变量播种施肥技术研究 总被引:9,自引:0,他引:9
由于种子的播种量不精确,化肥的施用存在利用率低、污染环境等问题。为了解决这些问题,必须进行精准变量播种施肥,变量播种施肥技术是精准农业的重要内容之一。文章介绍了精准农业的基本概念,并以精准农业为背景,介绍了变量播种施肥的概念及关键技术,探讨了当前变量播种施肥技术存在的问题及未来的发展前景。 相似文献
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In recent years, precision agriculture has received attention from producers, agribusiness, and governmental agencies in an effort to increase profitability and protect the environment. Many aspects of precision agriculture, such as soil fertility, application technology, and economic factors, have received substantial research attention; however, other aspects of precision agriculture have not been well documented. One important issue that warrants increased attention is water quality. Because of precision application technology, variable rate fertilizer application based on within-field heterogeneity has the potential to decrease negative water quality impacts. Therefore, the objective of this paired watershed study was to evaluate the impact of variable rate nitrogen (N) fertilizer application on surface water quality. The variable rate field was divided into management units designated as poor, moderate, and high based on measured yield potential and received 100–160 kg/ha of N fertilizer. A portion of the N application was uniformly applied pre-plant or at planting, and rest was sidedressed at variable rates. The uniform rate field received uniform N application at 135 kg/ha. Surface water runoff and water quality were monitored for each field, and collected samples were analyzed for N and phosphorus (P) constituents. During the 2-year monitoring period with 22 storm sampling events, variable rate N application resulted in few water quality differences compared to uniform rate application, but overall median NO3 + NO2–N concentrations were significantly lower for the variable rate field in the second year of variable rate N application. Overall and event mean NO3 + NO2–N concentrations from the variable rate field tended to be higher, but median concentrations from the uniform rate field tended to be higher. 相似文献
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This paper describes the field tests carried out to evaluate the new Vicon RS-EDW centrifugal fertilizer spreader, to be used in Precision Agriculture. The results of initial dynamic calibration tests showed a significant and systematic difference between the application rates of the two discs (about 20%). This difference had to be corrected by the manufacturer that carried out the necessary changes to the electric actuators. The fertilizer spreader had good distribution homogeneity, considering different working velocities and different positions in the parcel. The pattern distribution curve for 18% super phosphate fertilizer led to an effective working width of 28 meters, with a coefficient of variation of 15%. The longitudinal test, under experimental working conditions led to a machine delay time of 6-7 seconds. The results show an actual fertilization application density between 74%-90% of that determined for each location. These results confirm that the spreader can be used to spread fertilizer differentially in the field. 相似文献
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Yamin Muhammad bin Wan Ismail Wan Ishak Abd Aziz Samsuzana bin Mohd Kassim Muhamad Saufi Akbar Farah Naz Ibrahim Muhammad 《Precision Agriculture》2022,23(4):1413-1448
Precision Agriculture - This research study focuses on the design of variable rate liquid fertilizer applicator which can measure the NPK status of soil and applies N, P and K nutrients... 相似文献
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政府的“千人计划”被专家评审时,基本上只看SCI的论文数量和影响因子的点数,不考虑对产业技术的影响力,致使一些有真才实学和国内产业发展急需的高端技术人才无法得到政府资助而回国效力。 相似文献