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Cropland acidification increases risk of yield losses and food insecurity in China
- Source :
- Environmental Pollution, 256, Environmental Pollution 256 (2020)
- Publication Year :
- 2020
-
Abstract
- Distinct cropland acidification has been reported in China due to nitrogen (N) fertilizer overuse. However, the impacts on food production and thereby on food security are largely unknown. Yield losses in the period 1980–2050 were therefore assessed by simulating soil pH changes combined with derived pH-yield relationships for wheat, maize and rice. If the N fertilizer input continues to increase at 1% annually, the predicted average soil pH decline is about one unit and relative yield losses are expected to increase from approximately 4%–24% during 2010–2050. If the N fertilizer increase stops in 2020 (N2020), the expected losses are approximately 16% in 2050, which is comparable to a scenario of 100% crop residue return (100%RR). However, if 30% of the N fertilizer is replaced by manure N (30%MR), the losses reduce to near 5% in 2050. Soil acidification was predicted to reverse and expected losses are only 2.5% in 2050 in a combined scenario of N2020, 100%RR and 30%MR. Our results illustrate the potential food insecurity induced by cropland acidification and address the necessity of mitigation.
- Subjects :
- Crops, Agricultural
Risk
China
Crop residue
010504 meteorology & atmospheric sciences
Nitrogen
Health, Toxicology and Mutagenesis
Yield (finance)
Soil acidification
010501 environmental sciences
engineering.material
Toxicology
Zea mays
01 natural sciences
Food Supply
Acidification
Soil
Soil pH
Yield loss
Duurzaam Bodemgebruik
Fertilizers
Triticum
0105 earth and related environmental sciences
Sustainable Soil Use
Food security
WIMEK
Field management
business.industry
Oryza
General Medicine
Hydrogen-Ion Concentration
Pollution
Manure
Crop Production
Environmental Systems Analysis
Agronomy
Milieusysteemanalyse
Food processing
engineering
Environmental science
Fertilizer
business
Model
Subjects
Details
- Language :
- English
- ISSN :
- 02697491
- Volume :
- 256
- Database :
- OpenAIRE
- Journal :
- Environmental Pollution
- Accession number :
- edsair.doi.dedup.....31071e6e97dd01d537042ee8a1a3b662