Jerapan Isotermal Fosfat Pada Tanah Ultisol

Acta Solum Pub Date : 2023-07-31 DOI:10.20527/actasolum.v1i2.1812

Muhammad Asnandi, Fadly Hairannoor Yusran, Muhammad Syarbini

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Abstract

The distribution area of mineral soil in Indonesia reaches 148 million ha. The acid mineral soil in South Kalimantan for Ultisol reaches 886.186 ha. Ultisols have low fertility and P availability. The low availability of P in the soil is caused by P being absorbed. Isothermal absorption is very useful for measuring P adsorption in the soil due to strong P fixation by Fe and Al in Ultisol soils. Many researchers have suggested determining the amount of P required to reach an optimum level for maximum crop yield to quantitatively describe isothermal adsorption, the most popular of which are Langmuir, Freundlich, and the Brunauer-Emmett-Teller (BET) equations. The purpose of this study was to determine the isothermal adsorption limit of P and describe quantitatively the isothermal adsorption in Ultisols in Banjarbaru City using the Langmuir, Freundlich, and BET equations. From the research results, it can be concluded that P adsorption on Ultisols in Gunung Kupang Village, Cempaka District, Banjarbaru City follows the BET Equation. The high and low P adsorption indicated the availability of P. In other words, the fixation activity of acid mineral soils could result in a smaller amount of available P for plants.

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超溶质土壤中的等温磷酸盐吸收

印度尼西亚矿质土壤分布面积达1.48亿公顷。Ultisol在南加里曼丹的酸性矿质土面积达886.186公顷。肥力和磷效度较低。土壤中磷有效度低是由于磷被吸收所致。由于多溶土中铁和铝对磷有很强的固磷作用，因此等温吸收对测定土壤对磷的吸附是非常有用的。许多研究人员建议确定达到最大作物产量的最佳水平所需的磷量，以定量描述等温吸附，其中最流行的是Langmuir, Freundlich和brunauer - emmet - teller (BET)方程。利用Langmuir、Freundlich和BET方程确定P在Banjarbaru市Ultisols中的等温吸附极限，并定量描述P在Ultisols中的等温吸附。从研究结果可以得出，Banjarbaru市Cempaka区Gunung Kupang村的Ultisols对磷的吸附符合BET方程。高磷和低磷的吸附表明了磷的有效性，即酸性矿质土壤的固定活性可能导致植物的有效磷量减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Acta Solum

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