%0 Journal Article %T Analysis of Seasonal Variation in Crop Residue Harvest and Sustainability of Its Energy Supply
秸秆资源收获季节性及其能源供应持续性分析 %A ZHOU Jing %A WU Haitao %A DING Shijun %A ZHU Chao %A
周晶 %A 吴海涛 %A 丁士军 %A 朱超 %J 资源科学 %D 2011 %I %X Sustainability of energy supply is particularly important for energy resources assessment. Crop residue is important raw material for bioenergy, while the seasonal variance nature of residue harvest may restrain its sustainable supply. In this paper, the authors examined seasonal variations in residue harvest and sustainability of its energy supply in 31 provinces of China by using the seasonal index and building the sustainability coefficient, respectively, based on main crop production data from 2005 to 2009. Subsequently, influencing factors affecting the persistence degree of supply were discussed. Results show that obvious seasonal variation occurred in straw harvest in 31 provinces. Over two thirds of provinces had more than half of their total residue resources distributed in September and October. However, monthly distribution of the residue varied significantly among provinces. All of the provinces could not guarantee continuous residue supply throughout the year in the absence of straw storage. The sustainability of supply varied greatly among provinces. Hunan, Anhui, and other major grain producing provinces located in the lower and middle reaches of the Yantze River had the highest continuity degree of supply with abundant residue which could fulfill the residue demand for 6 to 8 months, whereas other provinces just had enough supply in a few months and suffered from supply shortage to varying degrees during the rest months. The sustainability of supply was positively correlated with total residue production and negatively with the seasonal index and energy consumption, suggesting that abundant residue resources with uneven monthly distribution or huge straw demand measured by electricity consumption might lead to a low continuity degree. Geographic location, climatic condition, cropping system, industrial structure, and agricultural structure were the major causes of supply continuity degree. Diverse and abundant crop residue due to fertile soil across plain areas, temperate climate with plenty of rainfall and sunshine were the primary reasons why southern major grain producing provinces had a higher supply continuity degree than other provinces. Decreases in farmlands and the horticultural crop-oriented agricultural structure due to the advanced secondary industry and tertiary industry might explain why economically developed provinces had the lowest supply continuity. High-cool and rich-wind arid climate in the Qinghai-Tibet Plateau was the chief cause of bad supply persistence degree in Tibet and Qinghai. Henan, Shandong, and Heilongjiang were the largest crop residue producers, while their supply persistence degrees were not the highest ones. %K Biomass energy %K Crop residue %K Seasonal variation %K Sustainability of supply %K Seasonal index %K Sustainability coefficient
生物质能源 %K 秸秆 %K 季节性 %K 持续性 %K 季节指数 %K 持续性系数 %U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=EEC77E274DE7318A3783EDCEF97B692A&yid=9377ED8094509821&vid=27746BCEEE58E9DC&iid=5D311CA918CA9A03&sid=05D0CF7AA2D40B14&eid=05487D1A4AAEBAA6&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=26