Development of a variable-rate seeding control system for corn planters Part II: Field performance
Development of a variable-rate seeding control system for corn planters Part II: Field performance
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玉米播种机可变播种量控制系统的开发第二部分：田间表现
DOI：
10.1016/j.compag.2019.04.010
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发表时间：
2019-07-01
影响因子：
8.3
通讯作者：
Zhong, Xiangjun
中科院分区：
文献类型：
--
作者：
He, Xiantao;Ding, Youqiang;Zhong, Xiangjun
变量施肥播种（VRS）是一种精准农业技术，它能够根据土壤养分、光照以及储水能力等因素合理且精确地调整播种量，这不仅能大幅提高作物产量，还能减少种子用量。然而，现有的VRS控制系统价格昂贵，且不适用于中国的排种器。专门针对中国的VRS控制系统尚未被研发出来。本研究旨在开发一种用于玉米播种机的VRS控制系统，该系统具有播种单元灵活扩展、成本低且适用于中国排种器的特点。本研究的第一部分提供了关于VRS控制系统设计和实验室实验的详细信息，而这一部分则报告了该系统的田间性能。田间试验表明，所开发的系统采用播种滞后补偿算法，能够获得更短的滞后距离（LD）；我们的结果显示平均滞后距离为0.57米。播种精度值在96.62%到99.07%之间变化，平均值为97.64%。播种变异系数的值在0.45%到1.56%之间，平均值为1.04%。针对具有3种边界形状（凸形、凹形和凸凹形）区域的滞后距离变化值在0.07%到0.63%之间，该值用于评估VRS控制系统针对单个播种单元改变播种量的性能。与同时控制每行播种量的系统相比，本研究中开发的独立控制每行播种量的系统在具有不规则边界的田间区域播种时具有更高的精度。
Variable-rate seeding (VRS) is a precision agricultural technology that can properly and accurately adjust the seeding rate according to factors such as soil nutrients, light, and water storage capacity, which can not only greatly increase the crop yield, but also reduce the amount of seed used. Existing VRS control systems, however, are expensive and not suitable for use with a Chinese seed meter. A control system for VRS specifically for China has not yet been developed. This study was undertaken to develop a VRS control system for corn planters that offers flexible planter-unit expansion, is low cost, and suitable for use with a Chinese seed meter. Detailed information about the design and laboratory experiments on the VRS control system were provided in Part I of this study, whereas this part reports the field performance of the system. The field experiments indicated that the developed system, employing a compensation algorithm of seeding lag, can obtain a shorter lag distance (LD); our results showed an average LD of 0.57 m. The seeding accuracy value varied between 96.62 and 99.07%, with an average value of 97.64%. The values of the seeding coefficient of variance ranged from 0.45% to 1.56%, with an average value of 1.04%. The value of the variation of lag distance for zones having 3 boundary shapes (convex, concave, and convex-concave), which assesses the performance of the VRS control system for varying the seeding rates of individual planter units, varied between 0.07 and 0.63%. Compared with systems that control the seeding rate of each row simultaneously, the developed system in this study, which controls the seeding rate of each row independently, had greater precision when seeding In field zones with irregular boundaries.