中国生物质总氮库及其替代化肥的潜力

中国生物质总氮库及其替代化肥的潜力

崔晓辉、郭立月、李彩虹、刘美珍、吴光磊、蒋高明

关键词：农作物秸秆、畜禽粪便、生物质资源、合成氮肥、肥料利用、农业可持续发展

《可更新与可持续能源评述》（影响因子12.348）

2020年8月25日在线发表

The total biomass nitrogen reservoir and its potential of replacing chemical fertilizers in China

Renewable and Sustainable Energy Reviews

Available online 25 August 2020 (IF=12.348)

Xiaohui Cui, Liyue Guo, Caihong Li, Meizhen Liu, Guanglei Wu, Gaoming Jiang

Institute of Botany, The Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing, 100049, China

ABSTRACT Biomass resources originally produced by photosynthesis and their biodegradable derivatives such as crop straw, vegetable waste, livestock and poultry manure, etc., can be used as organic fertilizers which have huge potentials in replacing chemical ones. However, it is not clear how large the biomass nitrogen reservoir is in a certain region or country. In order to determine the biomass nitrogen reservoir and its potential to replace chemical fertilizers, we took China as a case, investigated 12 kinds of biomass resources and calculated their nitrogen reservoirs. It was found that the total amount of biomass (dry weight) in China was about 1.527 billion t?a?1 and the urine of animal (wet weight) was about 878.75 million t?a?1 . The sum of them contained 25.53 million t?a?1 nitrogen, being 4.12 times that of the amount of agriculture plants actual absorption for synthetic nitrogen fertilizers (6.20 million t?a?1) in the country in 2018. For biomass nitrogen, the biggest contributor came from the manure and urine of livestock and poultry (54.5%), followed by crop straw (22.9%), vegetable waste (9.4%), vinasse, vinegar and soy sauce lees (2.3%), municipal sludge (2.2%), garden waste (2.1%), urban and rural household garbage (1.8%), orchard waste (1.8%), fishery waste (1.6%), Chinese herbal dreg (0.64%), mushroom stick (0.63%), with slaughterhouse waste being 0.13%. We suggest the government should pay more attention to the utilization of biomass nitrogen by returning waste biological resources to agricultural ecosystem and achieve sustainable agricultural development in the future.

Keywords: Crop straw Livestock and poultry manure Biomass resources Synthetic nitrogen fertilizer Fertilizer utilization Agricultural sustainable development