天津市农作物秸秆资源量评估及分布特征评价

摘要

In this study, based on Tianjin statistical data, the crop straw types, resource extent and distribution of Tianjin were analyzed. The results showed that the collection resource extent of crop straw in Tianjin is 1.7×106 t, the competitive straw types were corn and wheat straw, respectively accounting for 52.0% and 34.0%, aggregating 87% in the whole region.The next types were cotton and rice straw, with the percentage 7.7% and 6.9%, respectively. The amount of crops straw was rich in 5 outskirt counties of Tianjin, and that was small in 4 surburb counties. Per unit sowing area decreased from northern to southern, west to east gradually.%依据天津市统计年鉴，对天津市农作物秸秆类型、资源量及其区域分布特点进行分析评价。结果表明：2012年全市可收集利用的秸秆资源量为1.7×106 t，玉米秸秆和小麦秸秆是天津市主要的作物秸秆种类，其资源量比重分别达到52.0%和34.0%，累积占全市秸秆总量的87.0%，属于优势秸秆资源。其次是棉花秸秆和稻谷秸秆，分别约占总量的7.7%和6.9%。秸秆资源总量区域分布特征显示，远郊5区县秸秆资源量较大，近郊4区和滨海新区秸秆资源量较小。单位播种面积资源分布呈现自北向南、自西向东递减的趋势。