摘要

<正>The global population is projected to reach 9.7 billion in 2050,companying with increasing food demand and rising bioenergy consumption, thus the global biomass production is expected to increase by up to 60% relative to the level in 2005 [1,2]. In sharp contrast, the acreage of agricultural land has been stagnant and even shrunk for a long time. Any expansion will happen mostly at the expense of habitat loss and threaten biological diversity.