基于浓度-吸光值函数预测土壤速效锌占比数据

土壤速效锌是指土壤中易被作物吸收利用的锌素，是表征土壤锌素供应状况的重要指标之一，及时测定和了解土壤中速效锌占比情况及其变化，对指导锌肥的施用是十分必要的。另外按照土壤样品号结合地理信息系统（GIS）技术，将各地点的土壤数据和信息进行深度整合和分析，绘制土壤速效锌占比地图，以直观的可视化形式呈现给用户。土壤速效锌浓度-吸光值函数是用于检测土壤中速效锌占比的方法，它是基于测定不同浓度的速效锌溶液在相同条件下吸收光谱从而测定锌离子的原理制成的。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=7.56*X+0.984，其中X为速效锌溶液浓度，Y为吸光值)；其次，将土壤样品重量为AKg配制成10L的速效锌溶液，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锌溶液浓度X1；最后，速效锌在土壤中的占比=速效锌的重量/土壤样品重量=10*X1/（A*1000）。

Soil available zinc refers to the plant-available zinc fraction in soils, and is one of the important indicators characterizing the zinc supply status of agricultural soils. Timely detection and quantification of the proportion and changes of soil available zinc are critical for guiding rational zinc fertilizer application. Additionally, by combining soil sample IDs with Geographic Information System (GIS) technology, soil data and information from all sampling sites can be deeply integrated and analyzed, followed by the generation of a spatial distribution map of soil available zinc proportion, which is presented to users in an intuitive visual format.

The concentration-absorbance function for soil available zinc is a standard method for quantifying the proportion of available zinc in soil, which is developed based on the principle of zinc ion quantification via absorption spectrum measurement of available zinc solutions with different concentrations under identical experimental conditions. The specific steps are as follows:
First, four standard concentration points (2 g/L, 3 g/L, 5 g/L, and 10 g/L) were prepared. The absorbance values of these four standard solutions were measured using an atomic absorption spectrophotometer, and the concentration-absorbance function was established as: Y = 7.56*X + 0.984, where X represents the concentration of the available zinc solution, and Y represents the measured absorbance value.
Second, a 10 L available zinc solution was prepared using a soil sample weighing A kg. The absorbance value Y1 of this solution was measured using an atomic absorption spectrophotometer, and the corresponding solution concentration X1 was back-calculated using the concentration-absorbance function established in the first step.
Finally, the proportion of available zinc in the soil sample is calculated as: Proportion of soil available zinc = (mass of available zinc / mass of soil sample) = (10 * X1) / (A * 1000).

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数据集介绍

特点

该数据集包含10074条土壤速效锌占比数据，每日更新，用于测定土壤中速效锌占比并指导锌肥施用。通过浓度-吸光值函数预测速效锌占比，并结合GIS技术进行数据整合和分析。