This paper aims to develop a vehicular integrated system collecting soil electrical conductivity(EC)and spectral *** system could collect soil EC and spectral reflectance automatically when the vehicle moves and save ...
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This paper aims to develop a vehicular integrated system collecting soil electrical conductivity(EC)and spectral *** system could collect soil EC and spectral reflectance automatically when the vehicle moves and save these measurement results with *** information could reflect the characteristics of soil parameters such as soil salinity and water ***,an Android-based vehicular detection system for soil conductivity and spectral reflectance information was *** electrical conductivity measurement was performed based on improved"current-voltage"four-terminal method.A STS-NIR spectrometer was used for collecting near-infrared spectral *** system collected the information of soil electrical conductivity and soil spectral reflectance while collecting GPS,which could be used for precision *** system was tested in a farm of Beijing on March 25,*** electrical conductivity of the farmland was measured and soil samples were *** content and soil electrical conductivity were measured in the *** result of these experiments showed that the system could work stably in farmland and had good prospects.
为了快速准确获取田间作物生长营养水平信息,设计了作物冠层营养诊断光谱检测仪,并进行了小麦大田测试。系统由光学传感器,信号采集驱动模块和控制器组成。光学传感器可测量300~1 100 nm范围内连续光谱,信号采集驱动模块用于提供稳定电压以及数据的A/D转换。开发了光谱采集控制软件安装于控制器,主要功能包括接收、处理、显示和存储采集到的数据。应用该仪器进行了标定试验,并针对大田冬小麦开展了大田试验,试验结果表明该仪器所测反射率与美国ASD Field Spec Hand Held 2光谱辐射仪所测的反射率之间具有较高的相关性,相关系数最低为0.991 8。分析了冬小麦叶绿素含量指标SPAD值与仪器所测反射率之间的相关性。选出相关性较高的550~900 nm波段进行主成分分析建立叶绿素预测模型,建模R2C为0.575,模型检验R2V为0.595。结果表明利用研发的便携式光谱检测仪能有效评估小麦营养叶绿素含量,为小麦的精细栽培提供理论与技术支持。
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