【摘要】 为准确提取四川省盆地地区莲藕种植空间信息，掌握该作物种植热点区域，采用高分六号遥感影像和地面调查数据，分析藕田光谱特征，提取该地区最佳遥感时期内莲藕种植空间信息；通过Moran’s I指数和Getis-Ord G_i~*指数分析四川莲藕空间分布特征及种植热点区域。结果表明：（1）基于极大似然分类法的莲藕空间信息的提取总精度为92.35%,Kappa系数为0.9045。（2）基于遥感的四川盆地莲藕种植面积约为128.57 km~2，分布于1374个乡镇，部分地区存在聚集现象；73个热点乡镇的莲藕种植面积为54.31 km~2，占四川盆地莲藕面积的42.24%，空间极化现象明显，主要分布于遂宁安居区、资阳乐至县、成都简阳市等区县。研究结果可为四川省开展乡镇专业化莲藕种植及莲藕产业优化调整提供参考。更多还原

【Abstract】 The purpose of this study is to accurately extract spatial information of lotus root cultivation in the basin area of Sichuan Province and to grasp the hotspot areas for this crop.First of all,we used the remote sensing images of GF-6 and ground survey data as data sources,analyzed spectral characteristics of lotus root fields in order to determine the best period of remote sensing,and extracted spatial information of lotus root cultivation in the area.Then,the spatial distribution characteristics and hotspot areas of lotus root cultivation in Sichuan were analyzed by Moran’s I index and Getis-Ord G_i~*index.The results showed that:(1) the tota accuracy of extracting spatial information of lotus root based on the maximum likelihood classification method was 92.35%,and the Kappa coefficient was 0.9045;(2) the area of lotus root cultivation in Sichuan basin based on remote sensing was about 128.57 km~2,which was distributed in 1374 townships,and some areas had aggregation phenomenon;the area of lotus root cultivation in 73 hotspot townships was 54.31 km~2,accounting for 42.24%of the lotus root cultivation area in the Sichuan basin,with obvious spatial polarization,mainly in Anju of Suining,Lezhi of Ziyang,Jianyang of Chengdu,etc.The results of the study can provide reference for the development of specialized lotus root cultivation in townships and the optimization of lotus root industry in Sichuan Province.更多还原