G2TT
来源类型Articles
规范类型论文
DOIhttps://doi.org/10.1016/j.scitotenv.2018.10.060
ISSN0048-9697
Biochar, soil and land-use interactions that reduce nitrate leaching and N2O emissions: A meta-analysis
Libert Amico, A.; Trench, T.; Rodriguez, A.; Martínez-Morales, M.P.
发表日期2019
出处Science of The Total Environment 651(Part 2): 2354-2364
出版年2019
语种英语
摘要

Biochar can reduce both nitrous oxide (N2O) emissions and nitrate (NO3-) leaching, but refining biochar’s use for estimating these types of losses remains elusive. For example, biochar properties such as ash content and labile organic compounds may induce transient effects that alter N-based losses. Thus, the aim of this meta-analysis was to assess interactions between biochar-induced effects on N2O emissions and NO3- retention, regarding the duration of experiments as well as soil and land use properties. Data were compiled from 88 peer-reviewed publications resulting in 608 observations up to May 2016 and corresponding response ratios were used to perform a random effects meta-analysis, testing biochar’s impact on cumulative N2O emissions, soil NO3- concentrations and leaching in temperate, semi-arid, sub-tropical, and tropical climate. The overall N2O emissions reduction was 38%, but N2O emission reductions tended to be negligible after one year. Overall, soil NO3- concentrations remained unaffected while NO3- leaching was reduced by 13% with biochar; greater leaching reductions (>26%) occurred over longer experimental times (i.e. >30 days). Biochar had the strongest N2O-emission reducing effect in paddy soils (Anthrosols) and sandy soils (Arenosols). The use of biochar reduced both N2O emissions and NO3- leaching in arable farming and horticulture, but it did not affect these losses in grasslands and perennial crops. In conclusion, the time-dependent impact on N2O emissions and NO3- leaching is a crucial factor that needs to be considered in order to develop and test resilient and sustainable biochar-based N loss mitigation strategies. Our results provide a valuable starting point for future biochar-based N loss mitigation studies.

主题land use ; fertilization ; nitrification ; nitrous oxide ; nitrogen ; soil organic carbon
URLhttps://www.cifor.org/library/7039/
来源智库Center for International Forestry Research (Indonesia)
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资源类型智库出版物
条目标识符http://119.78.100.153/handle/2XGU8XDN/94022
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Libert Amico, A.,Trench, T.,Rodriguez, A.,et al. Biochar, soil and land-use interactions that reduce nitrate leaching and N2O emissions: A meta-analysis. 2019.
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