而对多年生作物而言，其影响需要经过几年才能显现。

For perennial crops, it takes a few years before the impacts are realised.

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但是在该国670万公顷可耕地中，目前只有大约110万公顷多年生作物。

But out of 6.7 million hectares of arable land in the country, only some 1.1 million ha are currently under permanent crops.

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生产的原料：多年生禾草、生物质高粱、农作物残余物、大豆、木质生物质。

Feedstock. Perennial grasses, biomass sorghum, crop residues, soy beans, woody biomass.

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