Carbon and Nitrogen Mineralization of Rice Husk Biochar and Commonly Used Organic Manures in Bangladesh Under Two Moisture Conditions

Abstract

The goal of this research was to determine the carbon (C) and nitrogen (N) mineralization trends from various types of organic manures. At Patuakhali Science and Technology University's Department of Soil Science, a 120-day mineralization study was done under field capacity (aerobic) and continuous standing water (anaerobic) conditions. The results showed that under both aerobic and anaerobic conditions, cumulative carbon (CO₂-C) mineralization was higher for all manures. In addition, the carbon mineralization of different manures differed significantly. The largest cumulative carbon mineralization was discovered in poultry manure, while rice husk biochar had the lowest. Under field capacity conditions, the cumulative carbon mineralization followed the order as poultry manure˃ Mazim organic fertilizer˃ vermicompost˃ rice husk biochar. On the other hand, in continuous standing water the cumulative carbon mineralization followed the order as poultry manure˃ vermicompost˃ Mazim organic fertilizer˃ rice husk biochar. In both cases, the highest cumulative carbon (CO₂-C) mineralization was found in poultry manure and lowest was in rice husk biochar. Under both moisture conditions, the cumulative NH₄⁺-N mineralization occurred in the order as poultry manure˃ vermicompost˃ Mazim organic fertilizer˃ rice husk biochar. The maximum amount of cumulative NO₃^--N mineralization was found in poultry manure under both moisture conditions, while the lowest was found in rice husk biochar, in the same order as NH₄⁺-N. As a result, the data revealed that under anaerobic soil conditions, NH₄⁺-N was the dominating type of nitrogen, whereas in aerobic soil conditions, NO₃^--N was the dominating type of nitrogen.

Cite asMd. Shahin Hossin, Alok Kumar Paul, Md. Fazlul Hoque, Morsheda Akter Mukta, Md. Delowar Hossain. (2022). Carbon and Nitrogen Mineralization of Rice Husk Biochar and Commonly Used Organic Manures in Bangladesh Under Two Moisture Conditions. Research and Reviews: Journal of Environmental Sciences, 4(1), 1–10. https://doi.org/10.5281/zenodo.6477204