Quantification of the contribution of nitrogen fertilization and crop harvesting to soil acidification in a wheat-maize double cropping system
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Over fertilization with nitrogen (N) is considered the main driver of agricultural soil acidification in China. However, the contribution of this driver compared to other causes of soil acidification on intensive croplands has seldom been quantified under field conditions.
We measured the fate of major nutrients, and calculated the related H+ production, based on the difference between inputs and leaching losses of those nutrients for a wheat-maize rotation system on a moderate acid silty clay loam soil in a two-year field experiment.
Topsoil pH decreased 0.3 units in the plots with conventional (current farmer practice) high N fertilization after two years, with a proton production of 13.1 keq H+ ha−1 yr.−1. No apparent changes in topsoil pH were observed in the plots without N application, in spite of a proton production of 4.7 keq H+ ha−1 yr.−1. Crop uptake was the primary driver of H+ production, followed by N transformation processes and HCO3− leaching in both plots.
Nitrogen fertilization had a relative small direct impact on soil acidification due to a very limited nitrate leaching, induced by large N losses to air by denitrification in this specific moderately acid soil, whereas elevated base cation uptake by crops induced by N fertilization indirectly had a relative large impact.
KeywordsSoil acidification Agriculture N fertilization Wheat maize Soil pH Acid neutralizing capacity
This work was financially supported by the State Key Basic Research Programme (2017YFD0200101), the National Natural Science Foundation of China (41425007 and 31421092), China Ten-thousand Talent Programs (Liu X.J.), the Sino-UK Nitrogen Project (CINAg) and Sino-Netherlands cooperative project (grant 13CDP009).
- Anderson J (1962) Urease activity, ammonia volatilization and related microbiological aspects in some South African soils. Proc 36th Congr S Afr Sug Tech ASS: 97-105Google Scholar
- Bray RH, Kurtz L (1945) Determination of total, organic, and available forms of phosphorus in soils. Soil science 59:39–46Google Scholar
- Bremner J (1965) Total Nitrogen 1. Methods of soil analysis Part 2 Chemical and microbiological properties: 1149–1178Google Scholar
- Brümmer G (1986) Heavy metal species, mobility and availability in soils. Springer.Google Scholar
- Cabrera ML, Kissel DE (1988) evaluation of a method to predict nitrogen mineralized from soil organic matter under field conditions. Soil Sci Soc Am J 52:4: 1027–1031Google Scholar
- China NBoso (2016) China statistical yearbook. China Statistics Press, BeijingGoogle Scholar
- Freney J, Simpson J, Denmead O (1981) Ammonia volatilization. In ‘Terrestrial nitrogen cycles: processes, ecosystem strategies ans management impacts’.(Eds FE Clark, T Rosswall) pp. 291–302. Ecological Bulletins, StockholmGoogle Scholar
- Gee GW, Bauder JW (1986) Particle-size analysis 1. Soil Science Society of America, American Society of AgronomyGoogle Scholar
- Hilton J, Johnston A, Dawson C (2010) The phosphate life-cycle: rethinking the options for a finite resource. Proceedings-International Fertiliser Society, International Fertiliser SocietyGoogle Scholar
- Horowitz W (1970) Official methods of analysis. Association of Official Agricultural Chemists, WashingtonGoogle Scholar
- IUSS Working Group (2014) World reference base for soil resources 2014 international soil classification system for naming soils and creating legends for soil maps. FAO, RomeGoogle Scholar
- Kirk GJ, Bellamy PH, Lark RM (2010) Changes in soil pH across England and Wales in response to decreased acid deposition. Glob Chang Biol 16:3111–3119Google Scholar
- Kuang F (2016) Fate of N fertilizer and N balance in different cropping systems in purple soil areas of the upper reaches of the Yangtze River. China Agricultural UniversityGoogle Scholar
- Li Q (2014) Effect of urease inhibitor LIMUS on ammonia mitigation and crop yield and nitrogen use efficiency in different cropland of China. China Agricultural UniversityGoogle Scholar
- Miao Y, Stewart BA, Zhang F (2010) Long-term experiments for sustainable nutrient management in China. A review. Agronomy for Sustainable DevelopmentGoogle Scholar
- Nziguheba G, Smolders E (2008) Inputs of trace elements in agricultural soils via phosphate fertilizers in European countries. Sci Total Environ 390:53–57Google Scholar
- Shi R, Li J, Ni N, Mehmood K, Xu R, Qian W (2017) Effects of biomass ash, bone meal, and alkaline slag applied alone and combined on soil acidity and wheat growth. J Soils Sediments:1–11Google Scholar
- Schollenberger C (1945) Determination of soil organic matter. Soil Science 59:53–56Google Scholar
- Tang C, Weligama C, Sale P (2013) Subsurface soil acidification in farming systems: its possible causes and management options. Springer, Molecular Environmental Soil ScienceGoogle Scholar
- Ulrich B (1986) Natural and anthropogenic components of soil acidification. J Plant Nutr Soil Sci 149:702–717Google Scholar
- Ulrich B, Mayer R, Khanna PK (1979) Deposition von Luftverunreinigungen und ihre Auswirkungen in Waldökosystemen im SollingGoogle Scholar
- Wu L (2014) Fertilizer recommendations for three major cereal crops based on regional fertilizer formula and site specific adjustment in China. China Agricultural UniversityGoogle Scholar
- Yan X, Ti C, Vitousek P, Chen D, Leip A, Cai Z, Zhu Z (2014) Fertilizer nitrogen recovery efficiencies in crop production systems of China with and without consideration of the residual effect of nitrogen. Environ Res Lett 9. https://doi.org/10.1088/1748-9326/9/9/095002
- Zhang W (2013) Study on the present situation and the changes of soil testing and fertilizer recommendation in Sichuan province. Sichuan Agricultural UniversityGoogle Scholar