期刊
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
卷 20, 期 3, 页码 1524-1531出版社
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s42729-020-00242-w
关键词
Biochar; Methane; Nitrous oxide; Plant biomass; Yield-scaled GWP
资金
- FCT - Portuguese Foundation for Science and Technology [UIDB/04033/2020, CYN. STRESS PROJ/CI DETS/CGD/0011, WASTE2VALUE PDR2020-1.0.1-FEADER-032314, WASTECLEAN PROJ/IPV/IDI/019]
Cardoon could be cropped for agro-environmental, industrial, and pharmaceutical purposes. The aim of this study was to assess the effects of biochar on emissions of nitrous oxide (N2O), carbon dioxide (CO2), and methane (CH4), and productivity of cardoon crop. A pot experiment was run outdoors from April to August 2018, with a cardoon plant per pot. The following four treatments, with four replicates each, were applied: control, soil only; mineral, soil amended with mineral fertilizer (2.5 g N m(-2)); biochar, soil amended with biochar (1 kg m(-2)); and mineral+biochar, soil amended with mineral fertilizer (2.5 g N m(-2)) and biochar (1 kg m(-2)). The morphological characteristics and biomass production of cardoon plants were evaluated, and the fluxes of N2O, CO2 and CH4 were measured by using the closed chamber technique. The application of biochar combined with mineral reduced N2O emissions by 36% and global warming potential (GWP) by 26% relative to mineral. However, the cumulative CO2 and CH4 emissions as well as yield-scaled GWP were not significantly different among amended soil treatments. Furthermore, the biomass production was increased by 50% by the application of biochar combined with mineral fertilizer relative to mineral. It was concluded that biochar combined with mineral fertilizer is recommended as a pathway mitigation for agro-environmental purposes, because it reduces the global warming potential and could increase the biomass production of cardoon plants.
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