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首页> 外文会议>Proceedings of joint international agricultural conference (JIAC 2009) >SENSING SITE-SPECIFIC VARIABILITY IN SOIL AND PLANT PHOSPHORUS AND OTHER MINERAL NUTRIENTS BY X-RAY FLUORESCENCE SPECTROMETRY
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SENSING SITE-SPECIFIC VARIABILITY IN SOIL AND PLANT PHOSPHORUS AND OTHER MINERAL NUTRIENTS BY X-RAY FLUORESCENCE SPECTROMETRY

机译：X射线荧光光谱法检测土壤和植物磷及其他矿质营养素的比值变异性

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摘要

Detection and rapid response to in-season changes of soil nutrient availability and plant needs with weather conditions and site-specific characteristics are essential to the optimal performance of an agronomic crop production system. With recent advances in material science, detector design and sensitivity, and improved sample-target-detector geometry, quantitative determinations of light elements with low energy fluorescence are becoming more feasible. The non-destructive multi-element capability of X-ray fluorescence spectrometry (XRFS) have been applied to obtain compositional data on soil and plant samples in two large-scale field studies of nutrient management and mitigation of nutrient losses to the environment. The objectives are to demonstrate the benefits of XRFS in achieving accurate and timely compositional information. Significant relationships between XRFS-phosphorus concentrations and indices of plant availability supported the role of such methodology as a real-time soil phosphorus and other mineral nutrient sensor for site-specific precision management of nutrient inputs. Thus, the technology has an essential role in increasing nutrient-use efficiency and crop productivity while reducing nutrients losses from the farm.
机译：对农业养分生产系统的最佳性能至关重要的是，根据天气条件和特定地点的特性，对土壤养分的可利用性和植物需求的季节变化进行检测并做出快速响应，这对于实现农作物生产系统的最佳性能至关重要。随着材料科学，检测器设计和灵敏度的最新进步以及改进的样品-目标-检测器几何形状，具有低能荧光的轻元素的定量测定变得更加可行。 X射线荧光光谱法（XRFS）的无损多元素分析能力已用于两项大规模的养分管理和缓解养分流失到环境的研究中，以获取土壤和植物样品的成分数据。目的是证明XRFS在获得准确，及时的成分信息方面的好处。 XRFS-磷浓度与植物可利用性指标之间的重要关系支持了这种方法的作用，例如实时土壤磷和其他矿物质营养传感器，用于特定位置的营养输入精确管理。因此，该技术在提高养分利用效率和作物生产力同时减少农场养分流失方面具有至关重要的作用。

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