LAUSR

Due to the rapid increase in population and the decreasing availability of arable land and freshwater resources per capita, global crop production will need to double by 2050 to meet human food demand. In early March, the World Bank and the Food and Agriculture Organization (FAO) of the United Nations released a report saying that 45 countries are in urgent need of food aid and millions of people are in severe hunger (https://www.worldbank.org/en/topic/agriculture/brief/food-security-update). In addition to the 4.2 billion hectares of the world's arable land, more than 1 billion hectares of saline soil have not been effectively used, which provides the world room to improve global food production (https://www.fao.org/3/i5199e/i5199e.pdf). What we usually call 'saline and alkaline land' is actually divided into two main types: salinized soil (rich in sodium chloride and sodium sulfate) and alkalized soil (rich in sodium carbonate and sodium bicarbonate), the former accounts for about 40% of the world's salinized land, while the latter accounts for about 60%. This article is protected by copyright. All rights reserved.