首页|Mitigation strategies for soil acidification based on optimal nitrogen management

Mitigation strategies for soil acidification based on optimal nitrogen management

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Soil acidification is a serious constraint to food production worldwide.This review explores its primary causes,with a focus on the role of nitrogen fertilizer,and suggests mitigation strategies based on optimal N management.Natural acidification is determined by the leaching of weak acid mainly caused by climate and soil conditions,whereas the use of ammonium-based fertilizers,nitrate leaching and removal of base cations(BCs)by crop harvesting mostly accounts for anthropogenic acidification.In addition,low soil acid buffering capacity,mainly determined by soil parent materials and soil organic matter content,also accelerates acidification.This study proposes targeted mitigation strategies for different stages of soil acidification,which include monitoring soil carbonate content and pH of soils with pH＞6.5(e.g.,calcareous soil),use of alkaline amendments for strongly acidic soils(pH＜5.5)with aluminum toxicity risk to pH between 5.5 and 6.5,and decreasing acidification rates and supplementing BCs to maintain this optimal pH range,especially for soils with low acid buffering capacity.Effective mitigation involves optimizing the rate and form of N fertilizers used,regulating N transformation processes,and establishing an integrated soil-crop management system that balances acid production and soil buffering capacity.

Soil acidificationnutrient managementnitrogensoil buffering capacity

Pengshun WANG、Donghao XU、Prakash LAKSHMANAN、Yan DENG、Qichao ZHU、Fusuo ZHANG

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College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,China

National Academy of Agriculture Green Development,China Agricultural University,Beijing 100193,China

Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin,College of Resources and Environment,Southwest University,Chongqing 400716,China

Sugarcane Research Institute,Guangxi Academy of Agricultural Sciences,Nanning 530007,China

Queensland Alliance for Agriculture and Food Innovation,University of Queensland,St Lucia 4067,Brisbane,Queensland,Australia

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2024

10.15302/J-FASE-2024562

农业科学与工程前沿(英文版)

农业科学与工程前沿(英文版)

ISSN：
年,卷(期)：2024.11(2)