Sandy soil reclamation technologies to improve crop productivity and soil health: a review

IF 2.1 Q3 SOIL SCIENCE

Frontiers in soil science Pub Date : 2024-04-12 DOI:10.3389/fsoil.2024.1345895

S. Musei, S. Kuyah, Sylvia S. Nyawira, S. Ng’ang’a, W. Karugu, Alvin Smucker, L. Nkurunziza

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引用次数: 0

Abstract

Sandy soils are characterized by low soil moisture content and nutrient retention due to high permeability, limiting crop productivity and threatening food security in arid and semi-arid regions worldwide. Various reclamation technologies have been developed to address these challenges, but their effectiveness has not been comprehensively evaluated. This systematic review evaluated the performance of 42 sandy soil reclamation technologies reported in 144 studies from 27 countries that met specified selection criteria. Performance was evaluated based on response ratio (RR) of aboveground biomass and grain yield, as indicators of productivity, and soil moisture content and soil organic carbon (SOC), as indicators of soil health. The 42 technologies employed four main soil amendments: biochar, organic amendments, organic amendments combined with biochar, and soft rock. Overall, all technologies increased productivity and improved soil health. Biochar application was found to be the most effective technology, increasing grain yield by 51.6%, aboveground biomass by 67.4%, soil moisture content by 17.3%, and SOC by 74.2%. Soft rock application increased grain yield by 20.3%, aboveground biomass by 27.6%, soil moisture content by 54.5%, and SOC by 12.8%. Organic amendments increased grain yield by 48.7%, aboveground biomass by 45.6%, soil moisture content by 20.8%, and SOC by 36.7%. However, the combination of biochar and organic amendments showed lower improvements, with increases of 25.4%, 15.6%, 1.3%, and 25.4% for grain yield, aboveground biomass, soil moisture content, and SOC, respectively. Our conclusion is that the findings provide strong evidence that sandy soil reclamation technologies can significantly improve crop productivity and food security. Considering the variability in technologies responses across continents, there is need for further research to determine the optimal technology for specific locations, crops, and management practices.

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提高作物产量和土壤健康的沙质土壤改良技术：综述

沙质土壤的特点是土壤水分含量低，由于渗透性强，养分保持率低，限制了作物的生产率，威胁着全球干旱和半干旱地区的粮食安全。为应对这些挑战，人们开发了各种改良技术，但尚未对其有效性进行全面评估。本系统性综述评估了 27 个国家 144 项符合特定选择标准的研究中报告的 42 种沙质土壤改良技术的性能。性能评估基于地上生物量和谷物产量的反应比（RR）（作为生产力指标）以及土壤水分含量和土壤有机碳（SOC）（作为土壤健康指标）。42 项技术采用了四种主要的土壤改良剂：生物炭、有机改良剂、与生物炭相结合的有机改良剂以及软岩。总体而言，所有技术都提高了生产力，改善了土壤健康。施用生物炭是最有效的技术，谷物产量提高了 51.6%，地上生物量提高了 67.4%，土壤水分含量提高了 17.3%，SOC 提高了 74.2%。施用软岩可使谷物产量增加 20.3%，地上生物量增加 27.6%，土壤水分含量增加 54.5%，SOC 增加 12.8%。有机添加剂使谷物产量增加了 48.7%，地上生物量增加了 45.6%，土壤水分含量增加了 20.8%，SOC 增加了 36.7%。然而，生物炭和有机添加剂的组合改善程度较低，谷物产量、地上生物量、土壤水分含量和 SOC 分别增加了 25.4%、15.6%、1.3% 和 25.4%。我们的结论是，研究结果有力地证明了沙质土壤改良技术可以显著提高作物产量和粮食安全。考虑到各大洲对技术反应的差异，有必要开展进一步研究，以确定适合特定地点、作物和管理方法的最佳技术。

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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来源期刊

Frontiers in soil science

CiteScore

1.90

自引率

0.00%

发文量