地缘政治冲击肥料供应 澳大利亚农民寻求替代方案

全球地缘政治冲突正在推高肥料成本，给澳大利亚农业带来压力。俄乌冲突和美伊冲突导致能源价格上升，进而推高氮肥价格1。澳大利亚每年进口350-400万吨肥料1，农民面临日益加重的成本负担。

合成氮肥在全球粮食供应中占据关键地位。全球合成氮肥产量约占世界人口粮食供应的一半1。然而，氨生产过程能耗巨大，通过哈伯-博施工业流程产生的二氧化碳排放约占全球总排放的2%，每年产生430-500百万吨1。

面对供应压力和环保需求，生物肥料被视为可持续替代方案1。但这一选择存在明显局限。生物肥料的氮浓度远低于合成肥料，需要施用更多才能为植物提供相同可用氮1。

Global geopolitical tensions have created a precarious situation for Australian agriculture. Rising energy costs stemming from international conflicts have driven up nitrogen fertiliser prices, leaving farmers struggling with mounting expenses 1. Australia imports between 3.5 and 4 million tonnes of fertiliser annually, making the nation vulnerable to global supply disruptions 1.

The reliance on synthetic nitrogen fertilisers carries significant environmental implications. The Haber-Bosch industrial process used to produce ammonia accounts for approximately 2 percent of global carbon dioxide emissions, generating between 430 and 500 million tonnes annually 1. Synthetic nitrogen fertilisers currently support roughly half of the world's food supply 1, underscoring both the scale of the challenge and the urgency of developing alternatives.

Biofertilisers have emerged as a potential sustainable substitute, though they face considerable limitations. These alternatives contain substantially lower nitrogen concentrations than conventional fertilisers, requiring farmers to apply larger quantities to achieve equivalent plant-available nitrogen 1. Researchers and industry experts are calling for enhanced investigation and independent testing of biofertiliser products to establish their viability as a mainstream solution to the current fertiliser crisis 1.