Properties of Biochar Obtained from Tropical Crop Wastes Under Different Pyrolysis Temperatures and Its Application on Acidic Soil

• DOI: 10.3390/agronomy13030921
• Publication Date: 2023-03-21T07:15:03Z
• Authors: Shuhui Song; Ping Cong; Chao Wang; Puwang Li; Siru Liu; Zuyu He; Chuang Zhou; Yunhao Liu; Ziming Yang
• Keywords: Bagasse; Charcoal

When biochars are produced, feedstock is a crucial factor that determines their physicochemical properties. However, the characteristics of tropical crop waste-derived biochar have not been described and limit its availability. In this study, pineapple leaf (PAL), banana stem (BAS), sugarcane bagasse (SCB) horticultural substrate (HCS), were used to prepare at 300, 500 700 °C. Properties applications analysed. The results indicated hydrophobicity, nonpolarity aromaticity SCB (SCBB) higher than other due loss H (hydrogen), O (oxygen), N (nitrogen). pH PAL (PALB) BAS (BASB) ranged from 9.69 10.30 SCBB HCS (HCSB) with 7.17–9.77. PALB BASB, sylvite was dominant crystal structure. With temperature rising, C–H stretching, C=C stretching H–O in alcohol groups decreased, Si–O HCSB strengthened. Biochars obtained °C, especially HCSB, significantly promoted growth maize. BASB greatly increased soil pH/EC 6.90–7.35 0.67–0.95 ms/cm, while those 5.97–6.74 0.23–0.45 ms/cm. application pH, reducing acidic stress maize growth, prepared 300 Biochar lower will reduce energy consumption increase utilization efficiency agricultural waste resources.