Question

哪位好心人愿意帮翻译成中文，不要在线翻译。。。陌陌达！！！

ABSTRACT
Background Agricultural and environmental soil quality assessment calls for rapid, simple, inexpensive, nondestructive, yet accurate methods for determining the plant-available (PA) elements in soil. Recent advances in portable x-ray fluorescence (PXRF) spectrometry have resulted in enhanced elemental quantification, providing a potentially powerful method for rapid, on-site PA elemental determination. Methods To study the efficiency of PA elemental characterization in soil using PXRF, 650 samples collected in Louisiana were randomly divided into a modeling group (520 original samples; 517 remaining after outliers were omitted) and validation group (130 original samples; 127 remaining after outliers were omitted). Linear regression models were developed using data produced by PXRF scans and Mechlich-3 extracted/inductively coupled plasma (ICP) quantified elements (K, Ca, Cu, Zn) in both the modeling and validation datasets. Results The PXRF prediction model for PA- Ca and PA-K (macronutrients) had “good quality” while the prediction model for PA-Cu (micronutrient) had “indicator quality”, and PA-Zn (micronutrient) had “poor quality”. Soil pH had no significant impact on the content of nutrients in dry soil determined by PXRF. Summarily, PXRF showed good potential for characterizing PA Ca and K in soil, while micronutrient characterization was less robust.

Keywords Portable x-ray fluorescence • Mehlich-3 • Plant nutrients • Soil

Answer 1

摘要
评价农业和环境土壤质量，要求快速、简单、廉价、无损，并且可确定影响植物生长的有效准确的方法（PA）。便携式X射线荧光光谱法，研究进展表明（PXRF）有增强型元素量化，提供快速有效的方法，可现场对PA元素测定。用此方法来研究土壤中的元素PA使用的效率，在路易斯安那采集的650个样品随机分为模型组（520个样本；517个样本后剩余值略）和验证组（130个样本；127个样本剩余值略）。线性回归模型，以提供扫描和mechlich-3提取电感耦合等离子体（ICP）产生的数据量化的元素（K，Ca，Cu，Zn）中的建模和验证数据集。结果PA-Ca和PA-K提供预测模型（营养）有“质量好”，而PA-Cu预测模型（微量营养素）有“质量指标中等”，和PA-Zn（微量营养素）有“质量差”。土壤pH值对干土中所提供的养分含量没有显著的影响。综上所述，PXRF显示表征PA中的Ca和K在土壤有良好的调节作用，而微量元素的影响不太显著。
关键词：便携式X射线荧光，Mehlich-3，土壤，植物营养