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据报道,全世界有陆地面积134亿hm~2,其中仅有15亿hm~2作为耕地种植作物,有29亿hm~2可以生长草和灌木,但不适于种植作物,其余大部分地区因干旱等原因而不能利用。据测算,对于粮食作物而言,光合作用产生的有机物大约一半是粮食,另一半是秸秆。根据各种作物秸秆产量系数(稻谷1∶0.9;小麦1∶1.1;玉米1∶1.2;大豆1∶1.6;薯类1∶0.5;花生1∶0.8;杂粮1∶1.6)来推算农作物秸秆产量,世界每年生产秸秆
It is reported that there are 13.4 billion hectares of land in the world, of which only 1.5 billion hectares are cultivated as cultivated land, 2.9 billion hectares can grow grass and shrubs, but not suitable for growing crops. Most of the rest Drought and other reasons can not be used. It is estimated that about half of the organic matter produced by photosynthesis for food crops is grain and the other half is straw. Crop straw production was estimated based on the crop yield coefficients for various crops (1: 0.9 in rice; 1: 1.1 in wheat; 1: 1 in maize; 1: 1 in soybeans; 1: 1.5 in soybeans; 1: The world produces straw every year