Indirect measures of plant nutrients
Indirect measures of plant nutrients
复制标题
植物养分的间接测量
DOI：
10.1080/00103629809370050
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
R. W. Whitney
中科院分区：
文献类型：
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作者：
W. Raun;G. Johnson;H. Sembiring;E. V. Lukina;J. M. LaRuffa;W. Thomason;S. Phillips;J. Solie;M. Stone;R. W. Whitney
基于传感器的间接、非破坏性植物和土壤分析方法可以取代当今许多湿化学测试方法。自李比希于1850年首次采用土壤测试以来，已有140多年的历史。如今，使用非破坏性近红外反射分光光度法可以同时分析植物和土壤中的水分、有机碳（C）和总氮（N）。最近的工作有针对性的间接测量土壤中的养分状况，使用光谱辐射数据收集的作物冠层。植物冠层光谱测量的使用，部分是由更新的可变速率技术驱动的，该技术将营养物质应用于规定的区域。最近的工作记录了1平方米尺度上的显著土壤变异性。因此，有必要采取间接措施，以避免化学分析的成本（每公顷需要10，000个样品），并避免进行化学分析。此外，为了应用技术...
Abstract Indirect, non‐destructive sensor‐based methods of plant and soil analyses could replace many of the wet chemistry testing methods that are in place today. Over 140 years have past since Justus von Liebig first employed soil testing in 1850. Today, simultaneous analyses of moisture, organic carbon (C), and total nitrogen (N) in plants and soils using non‐destructive near infrared reflectance spectrophotometry are possible. Recent work has targeted indirect measurements of the nutrient status in soils using spectral radiance data collected from growing crop canopies. The use of spectral measurements from plant canopies has heen driven, in part, by newer variable rate technologies which apply nutrients to prescribed areas. More recent work has documented significant soil variabiliry on a 1 m2 scale. Because of this, indirect measures are necessary to avoid the cost of chemical analyses (10,000 samples requiredper hectare) and to avoid on‐the‐go chemistry. Also, in order for application technologies ...