Abstract:
Based on the data contained in the Dongying Statistical Yearbook (2004-2013) and Shandong Statistical Yearbook (2014), yields, densities and spatio-temporal distributions of crop straw resources in Dongying were analyzed and in addition, a grey prediction model (GM) was established to predict changes in the crop straw resources in future. Results show that during the period from 2004 to 2013, Dongying produced on average 147.51×10
4 t of crop straw every year, and the yields fluctuated aong a rising trend; in Dongying City, crop straw resources were distributed mostly, about 53.61%, in Guangrao County, followed by Lijin County, Kenli County, Dongying District and Hekou District; the resources were composed mainly of corn stalk, wheat straw and cotton stalk, but varied slightly from county (district) to county (district) proportion; and a gradually rising trend from the north to the south of Dongying was observed in density and per capita quantity of straw resources. In the end, crop straw production in Dongying City for the next 10 years was predicted with the GM (1, 1) model, with results indicating that the yield of crop straw will keep on rising steadily and may reach up to 154.611×10
4 t in 2020.