京津冀地区夏玉米生产潜力时空变异及其与现实产量的对比分析(英文)

编号 zgly0001585537

文献类型 期刊论文

文献题名 京津冀地区夏玉米生产潜力时空变异及其与现实产量的对比分析(英文)

作者 王涛  吕昌河  于伯华 

作者单位 InstituteofGeographicSciencesandNaturalResourcesResearch  CAS 

母体文献 Journal of Geographical Sciences 

年卷期 2011年04期

年份 2011 

分类号 S513 

关键词 WOFOST  summermaize  yieldpotential  yieldgap  theBeijing-Tianjin-Hebeiregion 

文摘内容 Crop potential productivity is a key index of scientifically appraising crop production and land population-supporting capacity. This study firstly simulated the potential and waterlimited yield of summer maize in the Beijing-Tianjin-Hebei (BTH) region using WOFOST model with meteorological data of 40 years, and then analyzed yield gaps between the actual and potential yield based on statistical data at county level. The potential and water-limited yield of summer maize in the BTH region is 6854–8789 kg/hm2 and 6434–8741 kg/hm2, and the weighted average for whole region is 7861 kg/hm2 and 7185 kg/hm2, respectively. The simulated yields gradually decrease from northeast to southwest with changes in climatic conditions particularly temperature and precipitation. Annual variation of potential yield is higher in the central and southern parts than the northeastern part. Compared to potential yield, the water-limited yield has higher coefficient of variation (CV), because of precipitation effects. The actual yield of summer maize was 2537–8730 kg/hm2, regionally averaged at 5582 kg/hm2, about 70% of the potential yield, implying that the region has room to increase the yield by improving crop management and irrigation systems.