Based on the methods of literature research and comprehensive analysis, this paper analyzed the ratio of straw and grain and the amount of crop residue resources of staple crops in China, pointed out the ways of utiliza-tion, problems, and countermeasures of crop residue resources. The results showed that ( 1 ) Crop residue re-sources included field residues and processing residues. Field crop residues could be estimated by the conversion of economic yield and harvest index or the ratio of straw and grain. Processing residues could be calculated by specific gravity method. (2) The results of the ratio of straw and grain of main crops and estimations of crop residues re-sources were different according to different studies. The same crops still had difference in ratio of straw and grain because of natural conditions, varieties and technology, etc, and yearly and inter-year differences of crop resi-dues resources were mainly due to growing environment, acreage and estimating precision. (3) The main ways of utilization included crop residue returned to field, and using as feed, energy, industrial material and cultivating edible fungi. But the effects of utilization of crop residues were low such as low utilization ratio, low conversion rate, poor economic benefit, severe environment pollution and other problems. Finally it proposed some sugges-tions, such as standardizing the estimation of residues resources, accurately measuring and determining the ratio of straw and grain, exploring the way of combining of residues resources utilization with main industry, and expanding corresponding industries.
crop residueestimation of crop residue resourcesthe ratio of straw and grainutilization of crop residue resourcesChina
NETL
NSTL
万方数据
维普
