Carbon-negative biofuels from low-input high-diversity grassland biomass
Carbon-negative biofuels from low-input high-diversity grassland biomass
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DOI：
10.1126/science.1133306
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发表时间：
2006-12-08
期刊：
影响因子：
56.9
通讯作者：
Lehman, Clarence
中科院分区：
文献类型：
--
作者：
Tilman, David;Hill, Jason;Lehman, Clarence
与玉米乙醇或大豆生物柴油相比，来自天然草原多年生植物的低投入高多样性（LIHD）混合物的生物燃料可以提供更多的可用能量，更大的温室气体减排量，以及每公顷更少的农业化学污染。高多样性草地的生物能源产量越来越高，十年后比单一栽培产量高238%。LIHD生物燃料是负碳的，因为净生态系统二氧化碳封存（土壤和根部中的二氧化碳为4.4兆公顷（-1）年（-1））超过生物燃料生产过程中的化石二氧化碳释放（0.32兆公顷（-1）年（-1））。此外，LIHD生物燃料可以在农业退化的土地上生产，因此既不需要取代粮食生产，也不需要通过破坏栖息地造成生物多样性的损失。
Biofuels derived from low-input high-diversity (LIHD) mixtures of native grassland perennials can provide more usable energy, greater greenhouse gas reductions, and less agrichemical pollution per hectare than can corn grain ethanol or soybean biodiesel. High-diversity grasslands had increasingly higher bioenergy yields that were 238% greater than monoculture yields after a decade. LIHD biofuels are carbon negative because net ecosystem carbon dioxide sequestration (4.4 megagram hectare(-1) year(-1) of carbon dioxide in soil and roots) exceeds fossil carbon dioxide release during biofuel production (0.32 megagram hectare(-1) year(-1)). Moreover, LIHD biofuels can be produced on agriculturally degraded lands and thus need to neither displace food production nor cause loss of biodiversity via habitat destruction.