农作物秸秆是农业生产的主要废弃物之一,含有大量的粗纤维和无氮浸出物。秸秆中平均含碳44%、氮0.6%、磷0.25%、钾1.4%,还含有镁、钙、硫等元素,具有很大的综合利用潜能,是一种重要的可再生资源。目前全世界每年产农作物秸秆1000亿~2000亿吨,中国每年达7亿吨以上。传统的处置农作物秸秆的方法是焚烧。焚烧秸秆会释放大量的一氧化碳、二氧化碳、氮 Crop straws are one of the major wastes of agricultural production, containing large amounts of crude fiber and nitrogen-free extracts. The straw contains an average of 44% carbon, 0.6% nitrogen, 0.25% phosphorus and 1.4% potassium, but also contains elements such as magnesium, calcium and sulfur and has great potential for comprehensive utilization. It is an important renewable resource. At present, the world produces 100 million to 200 billion tons of crop straw annually, and China annually reaches 700 million tons or more. The traditional method of disposing crop straws is burning. Burning straw releases large amounts of carbon monoxide, carbon dioxide and nitrogen