Design and Experiment of Row-Controlled Fertilizing–Weeding Machine for Rice Cultivation
2021
Shi, Yangjie | Xi, Xiaobo | Gan, Hao | Shan, Xiang | Zhang, Yifu | Shen, Hui | Zhang, Ruihong
Current approaches to topdressing and weeding operations for rice cultivation present several disadvantages, such as poor precision, low efficiency, serious environmental pollution, and so on. This paper presents a row-controlled fertilizing–weeding machine to improve the precision of fertilizing and weeding operations and to reduce the heavy pollution associated with rice cultivation. A proportional–integral–derivative algorithm was adopted to realize accurate fertilization control, and an automatic driving system for agricultural machinery based on BeiDou navigation was used for accurate row-controlled operation. Accuracy testing and field experiments were carried out. The results show that the fertilization control system can stabilize the speed to within 0.55 s of the desired speed with a standard deviation of around 0.32 r·min⁻¹. The row-controlled operation ensures the lateral deviation is within ± 5 cm at operating speeds below 5 km·h⁻¹. The high uniformity and accuracy of fertilization meet agronomic requirements and rice cultivation standards, and the weeding performance is acceptable at working speeds below 5 km·h⁻¹.
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