通过近红外光谱检测确定果和朱的叶子含量
Jianping Bao1, Mingyang Yu1, Jiaxin Li1
1College of Horticulture and Forestry Science, Tarim University, Alar, 843300, Xinjiang, People's Republic of China.
Scientific reports
|September 6, 2024
概括
精确的叶子含量预测果树和朱树是通过近红外光谱学实现的. 随机森林 (RF) 在果叶方面表现出色,而部分最小平方 (PLS) 则是朱叶的最佳结果,有助于评估营养缺乏.
科学领域:
- 农业科学 农业科学
- 频谱学是一种光谱学.
- 机器学习 机器学习
背景情况:
- 叶子中的含量是评估果树和朱树生长和营养状况的关键指标.
- 确定叶子中含量的传统方法可能是耗时和劳动密集的.
- 近红外 (NIR) 光谱为植物营养分析提供了一个快速而非破坏性的替代方案.
研究的目的:
- 开发和比较使用NIR光谱的预测模型来估计果树和百合树的叶子含量.
- 确定最有效的光谱预处理技术和机器学习算法,以准确地预测每个作物的.
主要方法:
- 从287个果和192个朱叶样本收集近红外吸收光谱.
- 应用Mahalanobis距离方法去除异常值,然后使用六种不同的光谱预处理技术.
- 我们比较了五种回归模型:反向传播神经网络 (BP),随机森林 (RF),部分最小平方 (PLS),K-最近邻居 (KNN) 和支持向量回归 (SVR).
主要成果:
- 对于果叶,SG+SD+CARS+RF的组合实现了最佳性能 (建模R2=0.854,RPD=2.586) 和RF在特征频段中优于其他模型.
- 对于朱叶,FD+CARS+PLS表现出优异的结果 (建模R2=0.795,RPD=2.426) 和PLS是特征带中最好的模型.
- 该研究确定了每个作物的最佳建模策略,突出了特定预处理和算法组合的有效性.
结论:
- 近红外光谱学与适当的化学测量方法相结合,提供了一种可靠的方法来预测果树和朱树的叶子含量.
- 最佳预测模型 (果的RF,朱的PLS) 可以帮助诊断营养缺乏并指导受精管理.
- 这些发现为果树种植的精准农业实践提供了宝贵的见解.
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