Refining Cotton Replanting Recommendations

IF 0.7 Q4 AGRICULTURAL ENGINEERING
Enrique Eduardo Pena Martinez, G. Collins, J. Ward, Natalie Nelson
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引用次数: 0

Abstract

The decision to replant suboptimal cotton (Gossypium hirsutum L.) stands has become more challenging in recent years because the suggested retail price per bag of replanting seed has increased by more than 25%. Previous studies have justified replanting when ≥ 50% of planted area is occupied by skips ≥ 0.91 m (3 ft). Revision of replanting recommendations was deemed necessary with the introduction of more advanced and accurate plant and skip detection methods. The objective of this study was to update replanting recommendations using unmanned aerial vehicles (UAVs). The study was conducted at three sites in eastern North Carolina during the 2019 and 2020 growing seasons. Each site had an early- and a late-planted trial. Treatment combinations were produced using various ratios of DP 1646 B2XF and DP 493 cotton seed. Simulated replanted plots were planted with 100% DP 1646 B2XF three to four weeks after initial planting. Following emergence, glyphosate and glufosinate were applied to terminate all conventional seedlings and produce random skips. Cotton skips were detected using a Zenmuse X5 RGB sensor mounted on a UAV. Yield was regressed to the percentage of planted area occupied by skips > 0.91 m. In 2019, the replanted treatment did not yield higher than earlier planted treatments but, in 2020, yields were significantly higher in the replanted treatment compared to most earlier planted treatments. The data suggest that a replant should be triggered when 30 to 40% of the planted area is occupied by skips ≥ 0.91 m.
完善棉花再植建议
近年来,重新种植次优棉花(Gossypium hirsutum L.)的决定变得更加具有挑战性,因为每袋重新种植种子的建议零售价格上涨了25%以上。先前的研究表明,当≥50%的种植面积被≥0.91米(3英尺)的跳过物占据时,重新种植是合理的。重新种植建议的修订被认为是必要的,引入了更先进和准确的植物和跳过检测方法。本研究的目的是更新使用无人机的重新种植建议。这项研究在2019年和2020年的生长季节在北卡罗来纳州东部的三个地点进行。每个地点都有一个早期和晚期种植试验。使用不同比例的DP 1646 B2XF和DP 493棉花种子产生处理组合。在初始种植后三到四周,用100%DP 1646 B2XF种植模拟的重新种植地块。出苗后,施用草甘膦和草膦终止所有常规幼苗并产生随机跳跃。使用安装在无人机上的Zenmuse X5 RGB传感器检测到棉花跳跃。产量回归到跳过0.91米的种植面积的百分比。2019年,重新种植的处理的产量并不高于早期种植的处理,但在2020年,与大多数早期种植处理相比,重新种植处理的产量明显更高。数据表明,当30%至40%的种植面积被≥0.91m的跳过物占用时,应触发重新种植。
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来源期刊
Journal of cotton science
Journal of cotton science AGRICULTURAL ENGINEERING-
CiteScore
0.90
自引率
20.00%
发文量
0
期刊介绍: The multidisciplinary, refereed journal contains articles that improve our understanding of cotton science. Publications may be compilations of original research, syntheses, reviews, or notes on original research or new techniques or equipment.
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