Possible utilization of ash from meat and bone meal and dried distillers grains gasification as a phosphorus fertilizer: crop growth response and changes in soil chemical properties

Abstract

Purpose Gasification process is regarded as a viable option for disposal of various types of organic waste. Its application to meat and bone meal (MBM) and dried distillers grains (DDG) is a new concept that is recently receiving more attention as possible strategy for safe recycling of these materials to benefit from their energy and nutrient value. Besides, this process produces ash that is rich in phosphorus (P) and may be suitable for utilization as a P fertilizer. Therefore, the objective of this study was to evaluate the effectiveness of these specific types of ashes as P fertilizer via evaluating their direct effect on canola growth, P uptake, apparent P recovery and changes in some selected soil chemical properties after their addition to a P-deficient soil.