【摘要】 随着人类工业化进程,近百年来全球变暖情况日益严峻,水稻产量受到严重冲击。水稻作为我国主要粮食作物与人民饮食直接相关,因此研究影响水稻产量的驱动因子并寻找有效措施具有重要意义。本文选取1990年与2017年Landsat影像,通过面向对象的分类方法提取营口市的土地利用类型,分析水稻种植区的时空变化,并探究气候因子与经济因子对水稻产量的影响。主要结论如下:(1)营口市水稻种植区主要分布在北部平原。近三十年,水稻种植面积缩减,转变为人工鱼塘;(2)水稻总产量与化肥折纯投入、水稻播种面积呈极显著正相关,适度增加化肥用量和增加水稻种植面积对增加水稻产量有积极作用;(3)水稻总产量与气候因子呈现不显著相关,但其作用依旧不可忽视;(4)高温热害会导致水稻产量下降,但适度的增温有助于产量提高。更多还原

【Abstract】 With the progress of human industrialization, global warming has become increasingly severe in the past 100 years,and rice production has been severely impacted. As the staple crops in China, rice is directly related to people’s diet. Therefore,it’s significant to study the driving factors affecting rice yield and find solutions. This paper selects the Landsat images from 1990 and 2017 to extract the land use types in Yingkou City through object-oriented classification method and analyzes the spatial and temporal changes of rice planting areas, then explores the effects of climatic factors and economic factors on rice yield. The main conclusions are as follows:(1) The rice growing areas in Yingkou City are mainly distributed in the northern plain. In the past three decades, rice planting area has been reduced and converted into artificial fish ponds.(2) The total rice yield was significantly positively correlated with the chemical fertilizer input and rice planting area; moderately increasing the chemical fertilizer amount and increasing the rice planting area had a positive effect on increasing rice yield.(3) The total rice yield is not significantly related to the climatic factors, but its role can’t be ignored.(4)High temperature weather will cause rice yield to decline, but moderate warming will help increase yield.更多还原