Synthesis and nutrient release patterns of a biochar-based N–P–K slow-release fertilizer

被引：0
作者：
W. Gwenzi
T. J. Nyambishi
N. Chaukura
N. Mapope
机构：
[1] University of Zimbabwe,Biosystems and Environmental Engineering Research Group, Department of Soil Science and Agricultural Engineering, Faculty of Agriculture
[2] University of South Africa (UNISA),Nanotechnology and Water Sustainability Research Unit (NanoWS)
[3] University of Zimbabwe,Marondera College of Agricultural Science and Technology
来源：
International Journal of Environmental Science and Technology | 2018年 / 15卷
关键词：
Agronomic applications; Biowastes; Environmental remediation; Water retention;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Biochar has excellent solute adsorption capacity, yet few studies have investigated its application as a nutrient carrier in the development of slow-release fertilizers. The current study developed a biochar-based N–P–K fertilizer (BSRF) and evaluated its nutrient release patterns relative to a conventional fertilizer. SEM and EDX analyses confirmed the coarse and highly porous microstructure of the biochar (SBC) that enabled it to effectively sorb NO3−, PO43−, and K+ and form a nutrient-impregnated BSRF. BSRF had lower NO3−, PO43−, and K+ release than the conventional chemical fertilizer, demonstrating its low release behavior. BSRF-amended sandy soil had higher water retention capacity than that amended with a conventional chemical fertilizer. BSRF has potential to reduce nutrient leaching, improve water retention, and hence increase crop nutrient and water use efficiencies. Future research should focus on understanding nutrient release mechanisms, synchronization of nutrient release with plant uptake, and applications of the BSRF in environmental remediation.
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页码：405 / 414
页数：9
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