Nitrogen leaching mitigation by tithonia biochar (Tithochar) in urea fertilizer treated sandy soil

IF 2 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Pure and Applied Chemistry Pub Date : 2024-05-13 DOI:10.1515/pac-2023-1137

Yetunde Bunmi Oyeyiola, Francis Bayo Lewu, Beatrice Olutoyin Opeolu

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Abstract

Nitrogenous fertilizer drift from farmlands accelerates nitrogen loads in groundwaters. Biochar potential to mitigate nitrogen leaching in urea treated sandy soil was monitored in a four weeks screenhouse leaching column experiment. The trial was a factorial combination of two biochar types (B1 and B2 applied at 5 t/ha) and two urea treatments (with urea at 120 kg/ha and without urea) laid in completely randomized design with three replications. Control that received neither urea nor biochar was compared. Four weekly leaching events were conducted in each leaching column containing 300 g soil amended with appropriate treatments. Amaranthus hybridus was the test crop. The NH4-N and NO3-N leached were generally highest during the week 2 leaching event such that total NO3-N leached was 427.3 % higher than total NH4-N leached with highest contributions from sole urea treatment. Biochar pretreatment reduced total N leached by 9.5 (B1) and 26.8 % (B2) relative to sole urea. Percentage of N added lost to leaching was highest (34.1 %) in sole urea treatment with B1 and B2 pretreatment reducing the value by 54.5 and 46.9 % respectively. Correlation analysis revealed electrical conductivity of the leachate and soil as dominant indicators for N leached in the soil studied.

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在尿素肥料处理过的沙质土壤中使用噻吨生物炭（Tithochar）缓解氮沥滤问题

农田中的氮肥漂移会加速地下水中的氮负荷。在一项为期四周的筛室浸出柱实验中，对生物炭减轻尿素处理过的沙质土壤中氮浸出的潜力进行了监测。试验由两种生物炭类型（B1 和 B2，施用量为 5 吨/公顷）和两种尿素处理（施用尿素 120 公斤/公顷和不施用尿素）组成，采用完全随机设计，三次重复。对照组既不施用尿素，也不施用生物炭。在每个含有 300 克经适当处理的土壤的沥滤柱中，每周进行四次沥滤。试验作物为杂交苋。在第 2 周的浸出过程中，NH4-N 和 NO3-N 的浸出量通常最高，因此 NO3-N 的总浸出量比 NH4-N 的总浸出量高出 427.3%，其中仅尿素处理的NH4-N 浸出量最高。与仅使用尿素相比，生物炭预处理减少了 9.5 %（B1）和 26.8 %（B2）的总沥滤氮。在单一尿素处理中，沥滤损失的氮添加百分比最高（34.1%），B1 和 B2 预处理分别减少了 54.5% 和 46.9%。相关分析表明，浸出液和土壤的电导率是研究土壤中氮浸出的主要指标。

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来源期刊

Pure and Applied Chemistry 化学-化学综合

CiteScore

4.00

自引率

0.00%

发文量

审稿时长

3-8 weeks

期刊介绍： Pure and Applied Chemistry is the official monthly Journal of IUPAC, with responsibility for publishing works arising from those international scientific events and projects that are sponsored and undertaken by the Union. The policy is to publish highly topical and credible works at the forefront of all aspects of pure and applied chemistry, and the attendant goal is to promote widespread acceptance of the Journal as an authoritative and indispensable holding in academic and institutional libraries.