Evaluating the effect of biochar rate and combination with fertilizer on the dynamics of soil nitrogen supply in tea plantation

文献类型： 外文期刊

第一作者： Zhang, Bangwei

作者： Zhang, Bangwei;Liu, Cenwei;Li, Qiang;Ye, Jing;Lin, Yi;Wang, Yixiang;Zhang, Bangwei;Burton, David L.

作者机构：

关键词： Biochar; Nitrogen synamics; Tea plantation; Soil nitrogen supply; Nitrogen exposure; Biochar-based organic fertilizer

期刊名称：SCIENTIFIC REPORTS （ 影响因子：3.9； 五年影响因子：4.3 ）

ISSN： 2045-2322

年卷期： 2025 年 15 卷 1 期

页码：

收录情况： SCI

摘要： Tea plantations commonly receive substantial quantities of nitrogen (N) fertilizer, with potential for considerable N loss to occur. This study assessed N retention in acidic tea plantation soil and examined how different biochar application rates and fertilizer combinations affect N dynamics, highlighting the importance of innovative technologies to monitor and enhance N supply management. This research adopted a modified 2-week aerobic incubation and ion-exchange membrane (IEM) techniques to evaluate the soil N supply in tea plantations following early-summer top-dressing as influenced by various biochar rates and fertilizer combinations. We quantified the amount of mineralized N in acidic tea plantation soils during the summer. Our results show that biochar enhances soil N supply not by increasing N mineralization directly but by improving soil mineral N retention. Notably, a threshold effect was identified at biochar application rates of 20-30 tonnes ha-1. The window for maximizing the effectiveness of inorganic fertilizers applied during the summer months in tea plantations could only be 2-4 weeks. The use of biochar-based organic fertilizers can enhance this period by enhancing N retention and availability in the soil. Measuring N mineralization potential via aerobic incubations and N exposure using IEM technology effectively elucidated soil N dynamics during summer period.

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