关键词:作物种质资源; 空间统计学; 空间分布特征; 综合农业分区 Spatial Distribution Characteristics of National Crop Germplasm Resources Based on Spatial Statistics in Comprehensive Agricultural Regional Scale CHEN Yan-Qing, CAO Yong-Sheng, FANG Wei*, CHEN Li-Na Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China Fund:This study was supported by the National Science and Technology Basic Work Special Project “Agricultural Biological Resources Survey of Guizhou Province” (2012FY110200) and the National Infrastructure for Crop Germplasm Resources (NICGR). AbstractIt is important to analyze and understand the spatial distribution features and models for the comprehensive collection, effective protection and efficient utilization of crop germplasm resources. The spatial distribution features of crop germplasm resources were analyzed in quantity, density and orientative features in comprehensive agricultural regional scale by using the spatial statistical principles and methods and ArcGIS software. In conclusion, the crop germplasm densities of The Yellow Huaihe-Haihe Rivers region and loess plateau region are the largest showing abundant crop germplasm resources in these two regions, which should be protected as a key point. The crop germplasm resources of the southern region of China and Gansu-Xinjiang region are the most widely distributed, and the distribution trend in these two areas is also the most obvious. The orientation angles of all districts except for the Gansu-Xinjiang region are within 90°. The distribution, distribution trend and the orientation angle not only can be used to analyze orientative distribution characteristics of regional resources, but also can help us to find the key factors affecting germplasm resource geographic distribution from spatial perspective. In concentration characteristics, the germplasm resources in Qinghai Tibet region, Inner Mongolia and the area along the Great Wall region and North-east region of China are the most centralized in distribution. We can take some measures to protect germplasm resources in these areas. This study reveals the difference in density and orientation characteristics of germplasm resources distribution and provides some theoretical bases in protection, utilization and collection of germplasm resources in different comprehensive agricultural regions.
Keyword:Crop germplasm resources; Spatial statistics; Spatial distribution characteristics; Comprehensive agricultural regions Show Figures Show Figures
图5 各农业区地理重心与种质资源重心对比图Fig. 5 Comparison chart between geographical center of gravity of comprehensive agricultural regions and the germplasm resources center of gravity
表1 各农业区标准差椭圆长短轴及方向角度 Table 1 Axes and orientation angles of standard deviation ellipse of germplasm resources in different comprehensive agricultural regions
农业区划名称 Agricultural districts’ name
短轴标准差距离 Standard deviation distance of minor axis (m)
长轴标准差距离 Standard deviation distance of long axis (m)
方向角度 Orientation angles (° )
东北区 North-east Region
203140.19
434764.44
15.16
内蒙古及长城沿线区 Inner Mongolia and the area along the Great Wall Region
144909.48
472624.79
58.35
华南区 Southern Region of China
223020.77
821941.19
86.27
甘新区 Gansu-Xinjiang Region
356182.90
1196847.53
109.40
西南区 South-west Region of China
308132.40
498914.56
38.11
长江中下游区 Middle and lower reaches of Yangtze River
302222.49
543553.91
50.78
青藏区 Qinghai Tibet Region
268163.17
665283.37
84.19
黄土高原区 Loess Plateau Region
191786.24
410850.27
73.77
黄淮海区 The Yellow Huai he-Hai he Rivers Region
247559.59
328552.74
5.80
表1 各农业区标准差椭圆长短轴及方向角度 Table 1 Axes and orientation angles of standard deviation ellipse of germplasm resources in different comprehensive agricultural regions
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