Alami, et al (2024) Impacts of High-Frequency Chicken Manure BiocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More Application on N₂O and CH₄Emissions from Vegetable Field in Subtropical China. Agronomy. https://doi.org/10.3390/agronomy14050926.

Vegetable production in subtropical China is characterized by high nitrogen (N) fertilization, frequent irrigation, and multiple crop rotations, leading to significant nitrous oxide (N2O) and methane (CH4) emissions. A study by Alami et al. (2024) explored the impact of high-frequency chicken manure biochar (CMB) application on these emissions and vegetable yield.

The study was conducted over seven vegetable growth seasons from April 2021 to May 2022 in Xiamen, China. Four treatments were compared: control with no fertilizer (CK), 100% chemical N fertilization (CN), 30% chicken manure N plus 70% chemical N (CMN + CN), and 30% chicken manure biochar N plus 70% chemical N (CMBN + CN). The results revealed significant differences in N2O emissions and vegetable yields among these treatments.

Cumulative N2O emissions were highest in the CMN + CN treatment at 111.8 kg N2O-N ha−1 and lowest in the CMBN + CN treatment at 44.1 kg N2O-N ha−1. This indicates a 35.9% to 65.7% reduction in emissions with the use of biochar. Meanwhile, CH4 emissions were negligible across all treatments, ranging from 0.07 to 0.8 kg CH4-C ha−1.

Interestingly, the application of CMB not only reduced N2O emissions but also increased vegetable yield by 16.1% compared to the CN treatment. The study suggests that CMB is a viable substitute for direct chicken manure, improving soil health and reducing greenhouse gas emissions.

The research highlights the importance of optimized fertilization practices in mitigating climate change impacts while enhancing agricultural productivity. By incorporating CMB into vegetable farming, farmers can achieve better environmental outcomes and higher crop yields. This study underscores the potential of biochar as a sustainable agricultural practice in subtropical regions.

Further research is recommended to explore the long-term effects of different biochar types and application rates on soil health and crop productivity.