In land scarce area, methods to increase cropping index, increase crop yield and increase planting area of wheat and sweat potato are adopted in order to increase food energy production.

在人多地少地区，粮食、饲料的供应通过增加复种、提高单产以及增加甘薯、小麦种植面积来解决。

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Sweet potato, which is non-grain crop, large output, large planting area, and high energy, is used as new type of energy crop.

非粮作物甘薯因具有产量大、种植面积广、能量产量高等特点可作为新型能源作物。

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