基于浓度-吸光值函数预测土壤速效硫占比数据

土壤速效硫是指土壤中易被作物吸收利用的硫素，是表征土壤硫素供应状况的重要指标之一，及时测定和了解土壤中速效硫占比情况及其变化，对指导硫肥的施用是十分必要的。土壤速效硫浓度-吸光值函数是用于检测土壤中速效硫占比的方法，它是基于测定不同浓度的速效硫溶液在相同条件下吸收光谱从而测定硫离子的原理制成的。首先，包括4个标准点分别为2g/L、3g/L、5g/L和10 g/L，用原子吸收分光光度计测量出这4个标准点的吸光值‌，从而可以确定出浓度-吸光值函数（Y=9.96*X-0.984，其中X为速效硫溶液浓度，Y为吸光值)；其次，将土壤样品重量为AKg配制成10L的速效硫溶液，再用原子吸收分光光度计测量出该溶液的吸光值Y1，根据第一步得出的浓度-吸光值函数反推算出速效硫溶液浓度X1；最后，速效硫在土壤中的占比=速效硫的重量/土壤样品重量=10*X1/（A*1000）。

Available sulfur in soil refers to the sulfur readily absorbable by crops, and is one of the important indicators characterizing the sulfur supply capacity of soil. Timely determining and understanding the proportion and changes of available sulfur in soil is of great significance for guiding the application of sulfur fertilizers. The concentration-absorbance function of soil available sulfur is a method for detecting the proportion of available sulfur in soil, which is developed based on the principle of determining sulfur ions by measuring the absorption spectra of available sulfur solutions with different concentrations under the same conditions. First, there are 4 standard concentration points: 2 g/L, 3 g/L, 5 g/L and 10 g/L respectively. The absorbance values of these 4 standard points are measured using an atomic absorption spectrophotometer, so that the concentration-absorbance function can be established as Y = 9.96*X - 0.984, where X is the concentration of the available sulfur solution and Y is the absorbance value. Next, take a soil sample weighing A kg and prepare a 10 L available sulfur solution, then measure the absorbance value Y1 of this solution using an atomic absorption spectrophotometer, and back-calculate the concentration X1 of the available sulfur solution based on the concentration-absorbance function obtained in the first step. Finally, the proportion of available sulfur in the soil = (weight of available sulfur / weight of soil sample) = 10*X1/(A*1000).

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数据集介绍

特点

该数据集用于预测土壤中速效硫的占比，包含9999条记录，每日更新。数据通过浓度-吸光值函数计算得出，适用于指导硫肥施用，优化农业生产。