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在基于SPAD的酸诊断中解现象学,使用生理时间和天花板分层测量

Chengyingying Qin^1,2,3, Haitao Xiang^1,2,3, Qiaoyi Huang⁴

¹State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.

Plants (Basel, Switzerland)

|February 27, 2026

概括

以生长度日 (GDD) 计量的生理时间,通过考虑植物发育,提高了米的诊断准确性. 这种方法提高了用于管理的SPAD仪表读数的可靠性.

科学领域:

农业学是一种农业学.
植物生理学植物生理学
土壤科学土壤科学

背景情况:

由于在发育过程中叶子绿色和度的非线性变化,学复杂化了使用SPAD读数的酸盐诊断.
现有的方法在不同的生长阶段和环境中缺乏稳定性.

研究的目的:

评估生理时间 (增长度日,GDD) 是否可以减轻基于SPAD的米诊断中的发育偏差.
在各种实地实验中提高诊断的可移植性和准确性.

主要方法:

分析了来自五个地点的20个独立实地实验的1141个观测结果.
包括不同肥处理 (0-300公斤N ha-1) 的日,印加和杂交大米品种.
在多个叶子位置 (LFT1-LFT5) 上测量SPAD,并使用SPAD和GDD预测叶子度 (LNC),植物度 (PNC) 和营养指数 (NNI).

主要成果:

将GDD与SPAD读数相结合,对LNC (R2高达0.75) 和PNC (R2高达0.79) 的跨环境准确性得到了持续的改善.
添加GDD显著减少了随生理时间的残留趋势,表明减少了发育偏差.
发现诊断信息集中在树冠中叶,并随生理时间而变化.
双叶SPAD协议与GDD相结合,保持了度目标的高精度.

结论:

生理时间 (GDD) 有效地减少了基于SPAD的诊断对大米的发展偏差.
将GDD与简化的SPAD协议相结合,为管理提供了一种符合时间,现场实践和强大的方法.
这种方法提高了生产中状况评估的可靠性和跨环境适用性.

关键词:

这就是SPAD SPAD的意思.关键的稀释的稀释.越来越多的度数数天.机器学习是机器学习.的营养指数的营养指数生理时间是生理时间.米米饭米饭米饭米饭.

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