人为活动对四川中部丘陵区村级景观的能流研究

Study on Energy Flow of Village-level Landscape in the Hill Region of Middle Sichuan Under Human Activities

村落具有人类活动所造成的许多景观特征,是研究人为干扰对景观影响的良好场所。利用美国IKONOS公司高分辨率卫星电子遥感图、GPS定位和GIS软件技术,研究川中丘陵区乡村景观生态系统能流特征。结果表明:住房到地块的时间与经济产能之间呈显著负相关;单位面积总投能与总产能之间、总投能与粮食产量之间、单位面积化肥投能和有机肥投能与粮食单产之间均存在显著二次曲线关系;初步确定新桥村的合理投能区间为1.80～8.887GJ/666.7m2。而由于投能不合理造成了不同景观立地间投能效益存在显著差异,能量产投比呈下降趋势,今后需合理配置土地资源,优化投能结构。

Villages have plenty of landscape characteristics resulted from human activities which makes them good objects to investigate the effects of human disturbance on landscape. In this paper, the highresolution satellite remote sensing images from the IKONOS Company and RS, GIS and GPS technology were used to study the energy flow of village-level landscape characteristics in the hill region of middle Sichuan. The results show that economic output-energy has significant negative correlation with the time used from house to farm. Significant conic equation correlation is also detected between whole input-energy and foodstuff output, whole input-energy and output-energy, fertilizer input-energy or orgarlic fertilizer input-energy and single yield. The reasonable input-energy interval of Xinqiao village is from 1.80-8.887 GJ/666.7 m^2. However, due to the unconscionable energy input, there is an obviously difference of the input-energy benefit among landscapes, and the proportion of output-energy and input-energy shows a reducing trend. In the future, it is necessary to reasonably deploy the land resources and optimize the input-energy structure.