期刊论文详细信息
Nitrogen 卷:3
Biochar Applied with Inorganic Nitrogen Improves Soil Carbon, Nitrate and Ammonium Content of a Sandy Loam Temperate Soil
Fred Otim1  Alfred Obia1  Lawrence Aula2  Joao Luis Bigatao Souza2  Peter Omara2  Daryl Brain Arnall2 
[1] Department of Agronomy, Gulu University, Gulu P.O. Box 166, Uganda;
[2] Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK 74078, USA;
关键词: biochar;    total nitrogen;    nitrate;    ammonium;    soil organic carbon;   
DOI  :  10.3390/nitrogen3010007
来源: DOAJ
【 摘 要 】

Biochar is suggested to improve soil properties. However, its combination with inorganic nitrogen (N) fertilizer in temperate soils is not well understood. This study compared the effect of fertilizer N-biochar-combinations (NBC) and fertilizer-N (FN) on total soil N (TSN), soil organic carbon (SOC), soil nitrate (NO3–N), and ammonium (NH4+–N). Soil samples were taken from experiments at Efaw and Lake Carl Blackwell (LCB), Oklahoma, USA with ten treatments consisting of three N rates (50, 100, and 150 kg N ha−1) and three biochar rates (5, 10, and 15 t ha−1). Results at Efaw showed greater TSN and SOC under NBC compared to FN by 3 and 21%, respectively. No percentage difference was observed for NH4+–N while NO3–N was lower by 7%. At LCB, TSN, SOC, NO3–N, and NH4+–N were higher under NBC by 5, 18, 24, and 10%, respectively, compared to FN. Whereas application of biochar improved SOC at both sites, NO3–N and NH4+–N were only significant at LCB site with a sandy loam soil but not at Efaw with silty clay loam. Therefore, biochar applied in combination with inorganic N can improve N availability with potential to increase crop N uptake on coarse textured soils.

【 授权许可】

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