Reduced water repellency of a grassland soil under elevated atmospheric CO2

摘要: Water repellency is a widespread characteristic of soils that can modify soil moisture content and distribution implicated in important processes such as aggregation carbon sequestration. Repellency arises consequence organic matter inputs; elevated atmospheric CO2 known to inputs, we tested the grassland after 5 years exposure free air dioxide enrichment experiment. Using water droplet penetration time test, found significant reduction at samples field content. As many potentially influenced by have been shown be modified (e.g. aggregation, C sequestration, recruitment from seed), suggest further exploration this phenomenon could enhance our understanding effects on ecosystem function. The mechanism responsible for change has not identified.