Article(id=1311999850602914002, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, articleNumber=null, orderNo=null, doi=10.6041/j.issn.1000-1298.2025.12.025, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1749312000000, receivedDateStr=2025-06-08, revisedDate=1752508800000, revisedDateStr=2025-07-15, acceptedDate=null, acceptedDateStr=null, onlineDate=1790734740162, onlineDateStr=2026-09-30, pubDate=1766592000000, pubDateStr=2025-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790734740162, onlineIssueDateStr=2026-09-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790734740162, creator=13701087609, updateTime=1790734740162, updator=13701087609, issue=Issue{id=1311999647825101743, tenantId=1146029695717560320, journalId=1311385739772133495, year='2025', volume='56', issue='12', pageStart='1', pageEnd='818', issueExtLink='null', onlineDate='null', pubDate='1766592000000', pubDateStr='2025-12-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1790734691815, creator='13701087609', updateTime=1790738411040, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1312015247465083866, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1312015247465083867, tenantId=1146029695717560320, journalId=1311385739772133495, issueId=1311999647825101743, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=279, endPage=288, ext={EN=ArticleExt(id=1311999851005567188, articleId=1311999850602914002, tenantId=1146029695717560320, journalId=1311385739772133495, language=EN, title=Research of Prescription Map-based Variable Rate Fertilization System for Rice and Wheat with Spatio-temporal Coupling Compensation Method, columnId=1311999707161919908, journalTitle=Transactions of the Chinese Society for Agricultural Machinery, columnName=Agricultural Equipment and Mechanization Engineering, runingTitle=null, highlight=null, articleAbstract=
Aiming to address the issues of resource waste and environmental pollution caused by uniform fertilization in traditional methods, as well as the inadequate adaptability of existing variable-rate fertilization systems' lag compensation approaches, a prescription map-based variable-rate fertilization system for rice and wheat featuring spatio-temporal coupling compensation function was designed. The system employed an STM32F407 chip and CAN bus architecture for the control unit and central processor. Integrated with ArcMap GIS platform, it proposed a digital prescription map generation method based on agronomic expert decisions. The developed human-machine interface software supported GPS message reception/parsing, prescription map loading, and high-efficiency retrieval. Innovatively, a spatio-temporally coupled calibration model for fertilizer application adjustment was established through dynamic outlet positioning modeling and lag time self-learning algorithm, enabling automatic field calibration and dynamic compensation of system response time. Bench tests demonstrated that the self-learning algorithm achieved over 90.5% accuracy across working speeds (4~8 km/h) and fertilization gradients (0~450 kg/hm2, 0~750 kg/hm2, 450~750 kg/hm2). Field trials showed that with spatio-temporal calibration enabled, the average fertilization accuracy reached 97.4% within 50-meter segments—an 8.0 percentage points improvement over non-calibrated status—while maintaining only 2.5 percentage points accuracy fluctuation at 8 km/h. This system provided a high-precision, low-cost intelligent solution for variable-rate fertilization in rice/wheat cultivation, offering technical support for China's national policy of reducing fertilizer use while increasing efficiency.
, authors=Youqiang DING
1, Bing QI
1, Yunxia WANG
1, Yue DENG
1, Maxat AMANTAYEV
1, 2, Wenyi ZHANG
1, authorsList=Youqiang DING, Bing QI, Yunxia WANG, Yue DENG, Maxat AMANTAYEV, Wenyi ZHANG, authorCompany=null, correspAuthors=Wenyi ZHANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1311999859863937281, articleId=1311999850602914002, tenantId=1146029695717560320, journalId=1311385739772133495, language=CN, title=基于时空耦合补偿的处方图式稻麦变量施肥系统研究, columnId=1311999707321303462, journalTitle=农业机械学报, columnName=农业装备与机械化工程, runingTitle=null, highlight=null, articleAbstract=
针对传统施肥方式均一化投入易造成资源浪费、环境污染以及现有变量施肥系统滞后补偿方法适应性不足的问题,本研究设计了一种基于时空耦合补偿的处方图式稻麦变量施肥系统。采用低成本STM32F407控制芯片和CAN总线控制架构对控制系统和核心中央控制器进行设计,结合ArcMap地理信息系统平台提出基于农学专家决策的数字化变量施肥处方图生成方法,开发了支持GPS报文接收、解析、处方图加载与高效检索的人机交互软件,提出了施肥量调节位置时空耦合校正模型,通过排肥口动态定位数学建模和滞后时间自学习算法,实现了系统响应时间的现场自动标定与动态补偿。台架试验表明,滞后时间自学习算法在不同作业速度(4~8 km/h)和施肥量梯度(0~450 kg/hm2、0~750 kg/hm2、450~750 kg/hm2)下的计算准确率均在90.5%以上;田间试验显示,开启时空耦合校正后,50 m作业段内平均施肥量精度达97.4%,较无校正状态提升8.0个百分点,且作业速度增至8 km/h时精度波动仅2.5个百分点。该系统为稻麦变量施肥提供了高精度、低成本的智能化解决方案。
, authors=丁友强
1, 祁兵
1, 王云霞
1, 邓越
1, Maxat AMANTAYEV
1, 2, 张文毅
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丁友强(1994—),男,助理研究员,博士,主要从事农业智能装备研究,E-mail:dyq_cau@163.com
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丁友强(1994—),男,助理研究员,博士,主要从事农业智能装备研究,E-mail:dyq_cau@163.com
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Structural diagram of prescription map-based variable rate fertilization control system for rice and wheat with spatio-temporal coupling compensation, figureFileSmall=D9gQ9n5+mJSmLadnWGoTjg==, figureFileBig=wkWTejTXXuUEb2fgGeIRew==, tableContent=null), ArticleFig(id=1311999864733524276, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图1, caption=
基于时空耦合补偿的处方图式稻麦变量施肥控制系统结构图1. 12 V蓄电池 2. 12 V稳压器 3. RTK接收机 4. Windows工控机 5. 中央控制器 6. 12-24 V升压变压器 7. 伺服电机 8. 排肥器
, figureFileSmall=D9gQ9n5+mJSmLadnWGoTjg==, figureFileBig=wkWTejTXXuUEb2fgGeIRew==, tableContent=null), ArticleFig(id=1311999864922267957, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 2, caption=
Design of central controller, figureFileSmall=uzuXpzttvjBT4RNwP2hhRA==, figureFileBig=SN8paY1rnwkOskwGCQ5+3A==, tableContent=null), ArticleFig(id=1311999864985182518, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图2, caption=
中央控制器设计, figureFileSmall=uzuXpzttvjBT4RNwP2hhRA==, figureFileBig=SN8paY1rnwkOskwGCQ5+3A==, tableContent=null), ArticleFig(id=1311999865056485687, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 3, caption=
Prescription map generation procedure based on agronomic expert decisions, figureFileSmall=9l6jI3Ei4d/tdA3Z/e75rw==, figureFileBig=H0VDq7uGdurzMYD0V86kmQ==, tableContent=null), ArticleFig(id=1311999865119400248, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图3, caption=
基于专家决策的处方图层生成步骤(此处方图仅为展示生成步骤的示例,田间试验所用非此处方图), figureFileSmall=9l6jI3Ei4d/tdA3Z/e75rw==, figureFileBig=H0VDq7uGdurzMYD0V86kmQ==, tableContent=null), ArticleFig(id=1311999865182314809, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 4, caption=
Human-machine interface software for variable-rate fertilizer application control system, figureFileSmall=Gzo7ZYXbNTOjgPFyQ/ldeg==, figureFileBig=Fu+6B1rQsrZ504T3USa4Nw==, tableContent=null), ArticleFig(id=1311999866792927546, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图4, caption=
变量施肥系统人机交互软件, figureFileSmall=Gzo7ZYXbNTOjgPFyQ/ldeg==, figureFileBig=Fu+6B1rQsrZ504T3USa4Nw==, tableContent=null), ArticleFig(id=1311999866901979452, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 5, caption=
Kinematic model for determining spatial coordinates of precision fertilizer discharge points, figureFileSmall=9d8pyk+mbbECliXHE2iTyw==, figureFileBig=ypvAuK4bMEv5hZ4/FjH9Hw==, tableContent=null), ArticleFig(id=1311999867002642749, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图5, caption=
排肥口动态定位数学模型, figureFileSmall=9d8pyk+mbbECliXHE2iTyw==, figureFileBig=ypvAuK4bMEv5hZ4/FjH9Hw==, tableContent=null), ArticleFig(id=1311999867094917438, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 6, caption=
Dynamic compensation model for spatial synchronization of fertilizer delivery, figureFileSmall=dQpvkoNaETyAtA2I/net3Q==, figureFileBig=GHzxmp5sFMRhUbmVh+ZTKg==, tableContent=null), ArticleFig(id=1311999867325604159, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图6, caption=
施肥量调节位置时空耦合校正模型, figureFileSmall=dQpvkoNaETyAtA2I/net3Q==, figureFileBig=GHzxmp5sFMRhUbmVh+ZTKg==, tableContent=null), ArticleFig(id=1311999867430461760, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 7, caption=
Curves of cumulative fertilizer application and real-time application under experiment conditions, figureFileSmall=sE7psbrXZgO8yBSFy4vXoA==, figureFileBig=VJWDLacG1L0iFjG+txJxkg==, tableContent=null), ArticleFig(id=1311999867745034561, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图7, caption=
不同试验条件下的累计施肥量曲线及单位时间施肥量曲线, figureFileSmall=sE7psbrXZgO8yBSFy4vXoA==, figureFileBig=VJWDLacG1L0iFjG+txJxkg==, tableContent=null), ArticleFig(id=1311999867858280770, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 8, caption=
Schematic of response lag time tlag, figureFileSmall=ssy9/cku9liI7tq5e8SOMg==, figureFileBig=io/3bYadghmwzT1QR1XUiA==, tableContent=null), ArticleFig(id=1311999867933778243, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图8, caption=
滞后时间tlag示意图, figureFileSmall=ssy9/cku9liI7tq5e8SOMg==, figureFileBig=io/3bYadghmwzT1QR1XUiA==, tableContent=null), ArticleFig(id=1311999868009275716, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 9, caption=
Test bench and measurement instrumentation, figureFileSmall=VV+adS4aU9dH9VqbH8+sQw==, figureFileBig=Jj7xJnHt77siFI6Cv6G/1A==, tableContent=null), ArticleFig(id=1311999868088967493, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图9, caption=
试验台架及测量方法, figureFileSmall=VV+adS4aU9dH9VqbH8+sQw==, figureFileBig=Jj7xJnHt77siFI6Cv6G/1A==, tableContent=null), ArticleFig(id=1311999868147687750, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 10, caption=
Step response characteristic curves of servo motor, figureFileSmall=lfXKpeh6C0Ft/P/6CJxssA==, figureFileBig=So++rpDTVugj/HUSNlhV4w==, tableContent=null), ArticleFig(id=1311999868214796615, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图10, caption=
伺服电机阶跃响应特性曲线, figureFileSmall=lfXKpeh6C0Ft/P/6CJxssA==, figureFileBig=So++rpDTVugj/HUSNlhV4w==, tableContent=null), ArticleFig(id=1311999868273516872, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Fig. 11, caption=
Field trials, figureFileSmall=b7WPHwz0R7qIqHQN3TSbcQ==, figureFileBig=im1qYeZiqE62M4WF7mIV2w==, tableContent=null), ArticleFig(id=1311999868344820041, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=图11, caption=
田间试验, figureFileSmall=b7WPHwz0R7qIqHQN3TSbcQ==, figureFileBig=im1qYeZiqE62M4WF7mIV2w==, tableContent=null), ArticleFig(id=1311999868424511818, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Tab. 1, caption=
Communication protocol between central controller and each unit
, figureFileSmall=null, figureFileBig=null, tableContent=
| 通讯单元 | 通讯类型与通讯协议 | 测试数据 | 测试数据解析 |
|---|
| Windows工控机-中央控制器 | RS232;自拟协议:$ AGRC_FERT,〈目标施肥量〉,〈单位〉,〈校验和〉*〈CR〉〈LF〉(参照NMEA-0183设计) | $ AGRC_FERT,150.5,kg/hm2*43\r\n | 查询当前施肥量为150.5 kg/hm2 |
| 称量传感器-中央控制器 | RS232;自拟协议:$ AGRCW,〈质量值〉,〈单位〉,〈UTC时间〉,〈校验和〉*〈CR〉〈LF〉(参照NMEA-0183设计) | $ AGRCW,10.500,kg,112035.50*1D\r\n | 11时20分35.50秒,称量传感器上报质量为10.5 kg |
| 中央控制器-电机伺服 | CAN;CANopen协议 | ID:0x601 Data:23 FF 60 00 E8 03 00 00 | 设置ID号为1的伺服电机转速为100 r/min(E8 03,小端传输,对应十进制为1 000,单位0.1 r/min) |
), ArticleFig(id=1311999868592283979, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=表1, caption=
中央控制器与各单元间的通讯协议
, figureFileSmall=null, figureFileBig=null, tableContent=
| 通讯单元 | 通讯类型与通讯协议 | 测试数据 | 测试数据解析 |
|---|
| Windows工控机-中央控制器 | RS232;自拟协议:$ AGRC_FERT,〈目标施肥量〉,〈单位〉,〈校验和〉*〈CR〉〈LF〉(参照NMEA-0183设计) | $ AGRC_FERT,150.5,kg/hm2*43\r\n | 查询当前施肥量为150.5 kg/hm2 |
| 称量传感器-中央控制器 | RS232;自拟协议:$ AGRCW,〈质量值〉,〈单位〉,〈UTC时间〉,〈校验和〉*〈CR〉〈LF〉(参照NMEA-0183设计) | $ AGRCW,10.500,kg,112035.50*1D\r\n | 11时20分35.50秒,称量传感器上报质量为10.5 kg |
| 中央控制器-电机伺服 | CAN;CANopen协议 | ID:0x601 Data:23 FF 60 00 E8 03 00 00 | 设置ID号为1的伺服电机转速为100 r/min(E8 03,小端传输,对应十进制为1 000,单位0.1 r/min) |
), ArticleFig(id=1311999868659392844, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Tab. 2, caption=
Comparison between self-developed central controller and market common controller
, figureFileSmall=null, figureFileBig=null, tableContent=
| 型号 | 规格/(mm×mm) | 主要功能接口 | 成本/元 |
|---|
| 野火STM32开发板 | 176×125 | 双RS232、双CAN、485、USB等 | 436 |
| 正点原子探索者 | 160×121 | 双RS232、CAN、485、USB等 | 402 |
| 本研究中央控制器 | 100×100 | 双RS232、CAN、USB | 190 |
), ArticleFig(id=1311999868772639053, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=表2, caption=
自研中央控制器与市场通用控制器对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 型号 | 规格/(mm×mm) | 主要功能接口 | 成本/元 |
|---|
| 野火STM32开发板 | 176×125 | 双RS232、双CAN、485、USB等 | 436 |
| 正点原子探索者 | 160×121 | 双RS232、CAN、485、USB等 | 402 |
| 本研究中央控制器 | 100×100 | 双RS232、CAN、USB | 190 |
), ArticleFig(id=1311999868852330830, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Tab. 3, caption=
Attribute of polygon feature layer
, figureFileSmall=null, figureFileBig=null, tableContent=
| 边界点序号 | 经度坐标/(°) | 纬度坐标/(°) | 施肥区及对应施肥量/(kg·hm-2) |
|---|
| 1 | 118.369757 | 32.044373 | 施肥区1(450) |
| 2 | 118.369856 | 32.044020 | 施肥区2(750) |
| 3 | 118.369912 | 32.044625 | 施肥区3(0) |
| ︙ | ︙ | ︙ | ︙ |
| 38 | 118.371778 | 32.045903 | 施肥区5(0) |
| 39 | 118.371840 | 32.046119 | 施肥区6(450) |
), ArticleFig(id=1311999869015908687, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=表3, caption=
边界点坐标及面要素属性表
, figureFileSmall=null, figureFileBig=null, tableContent=
| 边界点序号 | 经度坐标/(°) | 纬度坐标/(°) | 施肥区及对应施肥量/(kg·hm-2) |
|---|
| 1 | 118.369757 | 32.044373 | 施肥区1(450) |
| 2 | 118.369856 | 32.044020 | 施肥区2(750) |
| 3 | 118.369912 | 32.044625 | 施肥区3(0) |
| ︙ | ︙ | ︙ | ︙ |
| 38 | 118.371778 | 32.045903 | 施肥区5(0) |
| 39 | 118.371840 | 32.046119 | 施肥区6(450) |
), ArticleFig(id=1311999869083017552, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Tab. 4, caption=
Comparison of tlag_a,tlag_c and δ under different test conditions
, figureFileSmall=null, figureFileBig=null, tableContent=
| 作业速度/(km·h-1) | 施肥量0~450 kg/hm2 | 施肥量0~750 kg/hm2 | 施肥量450~750 kg/hm2 |
|---|
| tlag_a/s | tlag_c/s | δ/% | tlag_a/s | tlag_c/s | δ/% | tlag_a/s | tlag_c/s | δ/% |
|---|
| 4 | 2.45 | 2.30 | 93.9 | 2.33 | 2.45 | 95.0 | 1.60 | 1.70 | 93.8 |
| 6 | 2.05 | 2.20 | 92.7 | 2.32 | 2.48 | 92.9 | 1.38 | 1.28 | 92.5 |
| 8 | 1.57 | 1.70 | 91.5 | 1.52 | 1.66 | 90.5 | 1.43 | 1.32 | 92.1 |
), ArticleFig(id=1311999869166903634, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=表4, caption=
不同试验条件下的tlag_a、tlag_c和δ对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 作业速度/(km·h-1) | 施肥量0~450 kg/hm2 | 施肥量0~750 kg/hm2 | 施肥量450~750 kg/hm2 |
|---|
| tlag_a/s | tlag_c/s | δ/% | tlag_a/s | tlag_c/s | δ/% | tlag_a/s | tlag_c/s | δ/% |
|---|
| 4 | 2.45 | 2.30 | 93.9 | 2.33 | 2.45 | 95.0 | 1.60 | 1.70 | 93.8 |
| 6 | 2.05 | 2.20 | 92.7 | 2.32 | 2.48 | 92.9 | 1.38 | 1.28 | 92.5 |
| 8 | 1.57 | 1.70 | 91.5 | 1.52 | 1.66 | 90.5 | 1.43 | 1.32 | 92.1 |
), ArticleFig(id=1311999869242401107, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Tab. 5, caption=
Analysis of variance for fertilization rate precision η
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变异来源 | 平方和 | 自由度 | 均方 | F | p | 显著性 |
|---|
| 校正状态(A) | 1 074.41 | 1 | 1 074.41 | 121.36 | <0.001 | ** |
| 施肥量梯度(B) | 68.72 | 2 | 34.36 | 3.88 | 0.049 | * |
| 速度(C) | 53.18 | 2 | 26.59 | 3.00 | 0.085 | ns |
| A×B | 94.65 | 2 | 47.33 | 5.34 | 0.021 | * |
| 误差 | 159.14 | 10 | 15.91 | | | |
), ArticleFig(id=1311999869317898580, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=表5, caption=
施肥量精度η方差分析
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变异来源 | 平方和 | 自由度 | 均方 | F | p | 显著性 |
|---|
| 校正状态(A) | 1 074.41 | 1 | 1 074.41 | 121.36 | <0.001 | ** |
| 施肥量梯度(B) | 68.72 | 2 | 34.36 | 3.88 | 0.049 | * |
| 速度(C) | 53.18 | 2 | 26.59 | 3.00 | 0.085 | ns |
| A×B | 94.65 | 2 | 47.33 | 5.34 | 0.021 | * |
| 误差 | 159.14 | 10 | 15.91 | | | |
), ArticleFig(id=1311999869393396053, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Tab. 6, caption=
Average η under different calibration statuses and fertilization rates
, figureFileSmall=null, figureFileBig=null, tableContent=
| 校正状态 | 施肥量梯度/(kg·hm-2) | 平均施肥量精度η/% | 精度总体均值/% |
|---|
| 0~450 | 97.9±1.0 | |
| 有校正 | 0~750 | 97.0±1.5 | 97.4 |
| 450~750 | 97.2±1.3 | |
| 0~450 | 90.4±1.3 | |
| 无校正 | 0~750 | 87.8±3.7 | 89.4 |
| 450~750 | 90.1±2.1 | |
), ArticleFig(id=1311999869468893526, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=表6, caption=
不同校正状态及施肥量梯度下平均施肥量精度
, figureFileSmall=null, figureFileBig=null, tableContent=
| 校正状态 | 施肥量梯度/(kg·hm-2) | 平均施肥量精度η/% | 精度总体均值/% |
|---|
| 0~450 | 97.9±1.0 | |
| 有校正 | 0~750 | 97.0±1.5 | 97.4 |
| 450~750 | 97.2±1.3 | |
| 0~450 | 90.4±1.3 | |
| 无校正 | 0~750 | 87.8±3.7 | 89.4 |
| 450~750 | 90.1±2.1 | |
), ArticleFig(id=1311999869531808087, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=EN, label=Tab. 7, caption=
Comparison of actual fertilizer rates QA and η under different test conditions(50 m working length)
, figureFileSmall=null, figureFileBig=null, tableContent=
| 作业速度/(km·h-1) | 校正状态 | 施肥量0~450 kg/hm2 | 施肥量0~750 kg/hm2 | 施肥量450~750 kg/hm2 |
|---|
| QA/(kg·m-2) | η/% | QA/(kg·m-2) | η/% | QA/(kg·m-2) | η/% |
|---|
| 4 | | 443.6 | 98.6 | 740.1 | 98.7 | 762.8 | 98.3 |
| 6 | 有校正 | 457.2 | 98.4 | 780.6 | 98.9 | 730.3 | 97.4 |
| 8 | | 464.7 | 96.7 | 723.5 | 96.5 | 781.6 | 95.8 |
| 4 | | 413.2 | 91.8 | 685.7 | 91.4 | 690.0 | 92.0 |
| 6 | 无校正 | 403.9 | 89.8 | 660.0 | 88.0 | 678.3 | 90.4 |
| 8 | | 402.9 | 89.5 | 630.5 | 84.1 | 658.5 | 87.8 |
), ArticleFig(id=1311999869607305560, tenantId=1146029695717560320, journalId=1311385739772133495, articleId=1311999850602914002, language=CN, label=表7, caption=
不同试验条件下实际施肥量QA以及施肥量精度η的对比(50 m作业长度)
, figureFileSmall=null, figureFileBig=null, tableContent=
| 作业速度/(km·h-1) | 校正状态 | 施肥量0~450 kg/hm2 | 施肥量0~750 kg/hm2 | 施肥量450~750 kg/hm2 |
|---|
| QA/(kg·m-2) | η/% | QA/(kg·m-2) | η/% | QA/(kg·m-2) | η/% |
|---|
| 4 | | 443.6 | 98.6 | 740.1 | 98.7 | 762.8 | 98.3 |
| 6 | 有校正 | 457.2 | 98.4 | 780.6 | 98.9 | 730.3 | 97.4 |
| 8 | | 464.7 | 96.7 | 723.5 | 96.5 | 781.6 | 95.8 |
| 4 | | 413.2 | 91.8 | 685.7 | 91.4 | 690.0 | 92.0 |
| 6 | 无校正 | 403.9 | 89.8 | 660.0 | 88.0 | 678.3 | 90.4 |
| 8 | | 402.9 | 89.5 | 630.5 | 84.1 | 658.5 | 87.8 |
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