Assessment of soil fertility status in cotton-based cropping systems in Cote d’Ivoire

IF 2.1 Q3 SOIL SCIENCE

Frontiers in soil science Pub Date : 2022-08-12 DOI:10.3389/fsoil.2022.959325

Ismail Koné, Konan-Kan Hippolyte Kouadio, Emmanuel N’Goran Kouadio, W. Agyare, N. Owusu-Prempeh, William Amponsah, T. Gaiser

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引用次数: 2

Abstract

Cotton is the main cash crop in northern Côte d’Ivoire, where intensive cultivation along with low external inputs has led to a decline in crop yields due to soil degradation. The present study aims to assess the evolution of soil fertility during the 2013 and 2021 periods in the cotton basin area of Côte d’Ivoire. More specifically, the study (i) identified the limiting physico-chemical parameters of soil fertility, and (ii) analysed the state of evolution of soil fertility in 2013 and 2021 in the cotton basin of Côte d’Ivoire. For this purpose, a total of 64 soil samples were taken in 2013 and in 2021 on the same cotton plots on the 0-20 cm horizon. Chemical analyses of the soil samples in the laboratory were carried out on the following parameters: particle size distribution, pH water, total nitrogen (NT), Potassium (K+), Calcium (Ca2+), Magnesium (Mg2+), Sodium (Na+) and Cation exchange capacity (CEC). The results of the soil analyses showed that the sandy-clay textured topsoils dominate the whole study area in both years. This leads to a low retention capacity of exchangeable bases. Determination of the soil pH showed that the pH varies from slightly acidic to neutral (6.5

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科特迪瓦棉花种植系统土壤肥力状况评估

棉花是科特迪瓦北部的主要经济作物，由于土壤退化，该地区的集约种植和低外部投入导致作物产量下降。本研究旨在评估科特迪瓦棉花盆地地区2013年和2021年土壤肥力的演变。更具体地说，该研究（i）确定了土壤肥力的极限物理化学参数，（ii）分析了科特迪瓦棉花盆地2013年和2021年土壤肥力的演变状态。为此，2013年和2021年在0-20厘米的同一棉花地上共采集了64个土壤样本。实验室对土壤样品进行了以下参数的化学分析：颗粒大小分布、pH值、水、总氮（NT）、钾（K+）、钙（Ca2+）、镁（Mg2+）、钠（Na+）和阳离子交换容量（CEC）。土壤分析结果表明，在这两年中，砂质粘土质地的表土在整个研究区域占主导地位。这导致可交换碱基的低保留能力。土壤pH值的测定表明，土壤pH值从微酸到中性不等（6.5＜pH＜7）。Korogho、Boundili和Ferkessedougou部门最具限制性的化学性质是阳离子交换容量（CEC）和可交换碱之和（SEB），Mankono部门最具限制性的化学特性是CEC。然而，在2013年至2021年期间，所有部门的可交换阳离子（Ca2+、Mg2+和K+）含量和碱饱和度（BS）都显著增加，更准确地说是在曼科诺省。尽管我们观察到，与2013年相比，2021年土壤的化学性质略有增加，但这些值仍低于最低要求的阈值。这一结果表明，土壤的物理化学性质较差，因此肥力水平较低，这损害了棉花生产系统的可持续性。因此，施用有机和矿物改良剂对于增加这些土壤的营养成分至关重要。

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