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Camera-guided Weed Hoeing in Winter Cereals with Narrow Row Distance
Gesunde Pflanzen ( IF 3.1 ) Pub Date : 2020-10-29 , DOI: 10.1007/s10343-020-00523-5
Roland Gerhards , Benjamin Kollenda , Jannis Machleb , Kurt Möller , Andreas Butz , David Reiser , Hans-Werner Griegentrog

Farmers are facing severe problems with weed competition in cereal crops. Grass-weeds and perennial weed species became more abundant in Europe mainly due to high percentages of cereal crops in cropping systems and reduced tillage practices combined with continuous applications of herbicides with the same mode of action. Several weed populations have evolved resistance to herbicides. Precision weed hoeing may help to overcome these problems. So far, weed hoeing in cereals was restricted to cropping practices with row distances of more than 200 mm. Hoeing in cereals with conventional row distances of 125–170 mm requires the development of automatic steering systems. The objective of this project was to develop a new automatic guidance system for inter-row hoeing using camera-based row detection and automatic side-shift control. Six field studies were conducted in winter wheat to investigate accuracy, weed control efficacy and crop yields of this new hoeing technology.

A three-meter prototype and a 6-meter segmented hoe were built and tested at three different speeds in 150 mm seeded winter wheat. The maximum lateral offset from the row center was 22.53 mm for the 3 m wide hoe and 18.42 mm for the 6 m wide hoe. Camera-guided hoeing resulted in 72–96% inter-row and 21–91% intra-row weed control efficacy (WCE). Weed control was 7–15% higher at 8 km h−1 compared to 4 km h−1. WCE could be increased by 14–22% when hoeing was combined with weed harrowing. Grain yields after camera-guided hoeing at 8 km h−1 were 15–76% higher than the untreated control plots and amounted the same level as the weed-free herbicide plots. The study characterizes camera-guided hoeing in cereals as a robust and effective method of weed control.



中文翻译:

相机指导的行距较窄的冬季谷物杂草Ho

农民在谷物作物中的杂草竞争面临严重问题。欧洲的草杂草和多年生杂草种类变得更加丰富,这主要是由于谷物作物在种植系统中所占的百分比很高,耕作方式减少,再加上以相同作用方式连续施用除草剂。几种杂草种群已发展出对除草剂的抗性。精确的除草可能有助于克服这些问题。到目前为止,谷物杂草行仅限于行距超过200毫米的种植实践。常规行距为125-170毫米的谷物中的e头需要开发自动转向系统。该项目的目的是使用基于相机的行检测和自动侧移控制,开发一种新的行间动自动引导系统。

在150毫米播种的冬小麦中,构建了3米长的and头和6米长的分段头,并以三种不同的速度进行了测试。3 m宽的头与行中心的最大横向偏移为22.53 mm,6 m宽的头为18.42 mm。相机引导的行导致行间杂草控制功效(WCE)为72–96%,行内杂草为21–91%。与4 km h -1相比,杂草控制在8 km h -1时提高了7-15%。和杂草耙combined相结合时,WCE可以提高14-22%。在8 km h -1的相机引导下行后,谷物产量比未处理的对照样地高15–76%,与无杂草除草剂样地水平相同。这项研究将谷物中的相机引导作特征描述为一种强大而有效的杂草控制方法。

更新日期:2020-10-30
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