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使用修饰生物炭合成富含 struvite 的缓释肥料:溶解和浸出机制

Yanqi Li¹, Daocai Chi¹, Yidi Sun²

¹College of Water Resource, Shenyang Agricultural University, Shenyang, Liaoning 110866, PR China.

The Science of the total environment

|April 4, 2024

概括

一种新型的修饰生物碳斯特鲁维特肥料 (MAP-BC) 增强了营养的保留和缓慢释放和. 这种环保肥料显著促进了植物生长,减少了营养损失,为传统肥料提供了可持续的替代品.

科学领域:

农业科学农业科学
环境科学环境科学
材料科学材料科学材料科学

背景情况:

传统的肥料往往会导致大量的 (N) 和 (P) 损失.
改善营养保留和实现慢释放性质的肥料对于可持续农业至关重要.
生物炭和斯特鲁维特因其在营养管理方面的潜力而闻名,但它们的联合应用需要进一步研究.

研究的目的:

为了合成和表征一种修饰的生物碳斯特鲁维特肥料 (MAP-BC),以提高N和P的保留和缓慢释放能力.
研究从MAP-BC.中控制N和P缓释和脱吸动学的机制.
与传统肥料相比,评估MAP-BC在减少营养物质出,改善土壤结构和增强植物生长方面的有效性.

主要方法:

在pH8.8下使用修饰生物炭和特定的NH4+:PO43-度比率 (2:1) 合成MAP-BC.
批量显微镜表征和土壤柱浸出实验,以分析保留和释放机制.
应用Ritger-Peppas模型来预测营养释放周期和评估土壤总体稳定性和植物生长.

主要成果:

MAP-BC证明了有效的缓释N和P,预测释放周期超过160天.
与化学肥料相比,MAP-BC显著降低了N和P出速度 (3.55-3.62倍慢),并减少了出溶液体积.
MAP-BC的应用导致土壤大聚合物 (>0.25毫米) 大幅增加24.25%,并显著增强了植物生长.

结论:

MAP-BC作为一种长期,缓释肥料,有效地减少N和P营养物质的损失.
肥料的有效性源于斯特鲁维特溶解控制,生物炭再吸附和基于的沉.
马普-BC是一种有前途的可持续替代快速作用肥料,适合长期作物营养和改善土壤健康.

关键词:

基于生物炭的肥料.高纯度的斯特鲁维特.微观特征的描述和是和的组成部分.营养素释放动力学营养素释放动力学

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