摘要
水稻生态系统是陆地生态系统的重要组成部分,在碳循环中起着十分重要的作用,且在小尺度区域中,碳密度空间分布上也会存在不小的差异,故本研究旨在区域尺度上分析水稻生态系统碳密度空间分布差异并探究造成差异的原因。通过实测临安区水稻地上部分、根系以及土壤的碳密度,同时结合临安区地理数据,使用空间自相关分析方法分析各乡镇碳密度空间分布差异,并对差异性作具体分析,探究其影响因素。结果表明,临安区水稻生态系统碳密度空间上呈现一定的自相关性及聚集性,临安中部地区水稻生态系统碳密度值较低,西部地区水稻土壤碳密度值较高且呈聚集性,东部地区水稻作物碳密度值较高且呈聚集性。究其原因,在区域尺度上地形因素对水稻生态系统的碳密度有一定影响;同时,由于中部地区的过度施氮肥导致土壤性质破坏,故土壤氮密度也是影响碳密度的一个重要因素。本研究对指导当地水稻农业生产以及促进水稻农业发展具有重要意义。
Rice ecosystem is an important part of terrestrial ecosystem and plays an important role in the carbon cycle,although there are some differences in the spatial distribution of carbon density in small-scale regions,so this study aims to analyze the differences in the spatial distribution of carbon density in rice ecosystems on a regional scale and explore the reasons for the differences.Based on the measured carbon density of above-ground parts,roots and soil of rice in Lin'an area,and combined with the geographical data of Lin'an an area,we used the spatial autocorrelation analysis to analyze the spatial distribution difference of carbon density in each township,and made a specific analysis of the difference to explore its influencing factors.The results showed that the carbon density of rice ecosystems in Lin'an showed certain autocorrelation and aggregation spatially,with lower carbon density values in the central;higher and aggregated soil carbon density in the western and carbon density in the eastern.Topographic factors have an influence on the carbon density of rice ecosystems at the regional scale,excessive application of nitrogen fertilizer in the central region leads to the destruction of soil properties,so soil nitrogen density is also an important factor affecting carbon density.This study is important for guiding local rice agricultural production as well as promoting the development of rice agriculture.
作者
郭旭东
胡军国
毛国冬
GUO Xu-dong;HU Jun-guo;MAO Guo-dong(College of Mathematics and Computer Science,Zhejiang A&F University,Hangzhou 311300,China;Tonglu County Development and Reform Bureau,Hangzhou 311500,China)
出处
《山东农业大学学报（自然科学版）》
北大核心
2024年第2期202-209,共8页
Journal of Shandong Agricultural University：Natural Science Edition
基金
国家自然基金(31971493,31570629)。
关键词
水稻生态系统
碳密度
空间自相关
地形因素
氮密度
Rice ecosystem
carbon density
spatial autocorrelation
topographic factor
nitrogen density
