使用近红外反射光谱学对立玉米的收获时间
Matthew F Digman1, Jerry H Cherney2, Debbie J R Cherney2
1Department of Biological Systems Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
Sensors (Basel, Switzerland)
|March 13, 2024
概括
使用手持式近红外反射谱仪估计玉米的成熟度,以预测耳朵的湿度,提供了一种方便而准确的方法. 这种方法为牲畜料管理提供了传统的全植物湿度采样的可靠替代方案.
科学领域:
- 农业科学 农业科学
- 分析化学 分析化学
- 频谱学是一种光谱学.
背景情况:
- 准确的玉米成熟度评估对于优化牲畜料中的营养价值至关重要.
- 整个植物的水分含量是玉米成熟度的常见但劳动密集型指标.
- 目前测量玉米站立湿度的方法耗时,需要专门的农场设备.
研究的目的:
- 评估有效和准确的方法来估计站立全植物玉米的水分含量.
- 根据耳朵湿度测量,开发整植物湿度的预测模型.
- 评估用于此应用的手持近红外反射率 (NIR) 光谱仪的可行性.
主要方法:
- 开发了一种部分最小平方回归模型,使用2021年生长季节610个玉米植物的参考数据.
- 使用手持NIR光谱仪预测耳朵湿度,并应用关系来估计整个植物的湿度.
- 通过2022年生长季节的330个玉米植物验证了该模型.
- 评估了在三个NIR光谱仪中校准的可转移性.
主要成果:
- 耳朵湿度模型准确地预测了整个植物的湿度,在验证数据集中预测的标准误差为2.7和R2P为0.88.
- 耳朵的水分含量在26%至80%w.b.之间,相当于整个植物的水分从55%至81%w.b.之间.
- 观察到显著的光谱仪对光谱仪的差异,这可以通过将多个光谱仪纳入校准来减少.
结论:
- 手持NIR光谱仪提供了一种有希望的,方便和准确的方法,通过耳朵湿度来估计玉米的成熟度.
- 开发的模型有效地预测了整个植物的湿度,简化了牲畜料管理的关键方面.
- 需要进一步的研究,以确保在不同地理区域和长期使用的校准稳定性.
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