摘要
掌握农作物种质资源的空间分布特征,分析种质资源在地理空间上的聚集离散特征,对于作物种质资源全面收集、有效保护和高效利用具有重要意义。本研究基于空间统计学原理和方法,借助ARCGIS软件,从种质资源的数量、方位特征、集中程度分别分析不同综合农业分区内种质资源的空间分布特征。通过数量分析显示,黄淮海区和黄土高原区密度最大,说明这两个地区的种质资源最为丰富,需要重点保护;方位分析得出,华南区和甘新区的资源分布范围最广,并且资源方向分布趋势最为明显,除甘新区外,其他区域的资源方向角均在90°以内。资源的分布范围、分布趋势和方向角度不仅能分析区域资源的方位分布特征,还可从空间角度辅助寻找影响种质资源地理分布的关键因子;集中度分析中,青藏区、内蒙古及长城沿线区和东北区的种质资源分布最为聚集,可采取集中区域资源重点保护的策略。该项研究可为种质资源在不同综合农业分区内的保护、利用和收集提供理论依据。
It 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 Arc GIS 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.
出处
《作物学报》
CAS
CSCD
北大核心
2017年第3期378-388,共11页
Acta Agronomica Sinica
基金
国家科技基础性工作专项"贵州农业生物资源调查(2012FY110200)"
国家农作物种质资源平台项目(NICGR)资助~~
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
Crop germplasm resources
Spatial statistics
Spatial distribution characteristics
Comprehensive agricultural regions
