Enhancing Soil Nitrogen Retention Capacity by Biochar Incorporation in the Acidic Soil of Pomelo Orchards: The Crucial Role of pH
文献类型： 外文期刊
作者： Qian, Xiaojie 1 ; Li, Qinghua 2 ; Chen, Hongmei 1 ; Zhao, Lin 2 ; Wang, Fei 2 ; Zhang, Yushu 2 ; Zhang, Jinbo 3 ; Mueller, Christoph 4 ; Yi, Zhigang 1 ; Antoniadis, Vasileios 1 ; Petropoulos, Spyridon 1 ; Del Mar Alguacil, Maria 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Resources & Environm, Fuzhou 350002, Peoples R China
2.Fujian Acad Agr Sci, Inst Soil & Fertilizer, Fuzhou 350013, Peoples R China
3.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210023, Peoples R China
4.Justus Liebig Univ Giessen, Liebig Ctr Agroecol & Climate Impact Res, Heinrich Buff Ring 26, D-35392 Giessen, Germany
5.Justus Liebig Univ Giessen, Inst Plant Ecol, Heinrich Buff Ring 26, D-35392 Giessen, Germany
6.Univ Coll Dublin, Sch Biol & Environm Sci, Belfield D04V1W8, Dublin, Ireland
7.Univ Coll Dublin, Earth Inst, Belfield D04V1W8, Dublin, Ireland
关键词： nitrogen retention capacity; soil pH; biochar incorporation; TM; TI; O-NH4
期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN：
年卷期： 2023 年 13 卷 8 期
页码：
收录情况： SCI
摘要： Biochar is commonly used to improve acidic soil and reduce nitrogen loss. However, the impact of biochar on soil nitrogen retention, especially at varying pH levels, is not fully understood. Soil samples were obtained from an acidic red soil citrus orchard. The soil pH was adjusted using CaO, with five levels (4.0, 5.1, 5.8, 6.6, and 7.2), and two biochar doses (0% and 1%) were applied. The study used N-15-Tracer and Ntrace to investigate biochar's influence on soil nitrogen retention at different pH levels. The results showed that soil amendment with biochar improved gross mineralization rates (TM) and gross NH4(+) immobilization rates (TI), except at pH 4.0 for TI. Biochar enhanced heterotrophic nitrification (O-Nrec) within pH 4.0-7.4, with a threshold for autotrophic nitrification (O-NH4) at pH 6.4. The findings revealed biochar's positive effect on soil nitrogen retention within pH 4.5-6.4. Biochar had a greater impact on TI than TM and inhibited O-NH4, potentially enhancing nitrogen retention in this pH range. These results highlight the significance of considering biochar incorporation for improving nitrogen use efficiency and reducing NO3--N loss in subtropical pomelo orchards.
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