中国中、东部典型县域土壤与地表水体多样性的粒度效应及关联性  

EFFECT OF GRAIN SIZE ON AND CORRELATION ANALYSIS OF PEDODIVERSITY AND SURFACE WATER BODY DIVERSITY IN COUNTIES TYPICAL OF CENTRAL AND EAST CHINA

作　　者：任圆圆[1] 张学雷[1] 

机构地区：[1]郑州大学水利与环境学院自然资源与生态环境研究所,郑州450001

出　　处：《土壤学报》2015年第6期1237-1250,共14页Acta Pedologica Sinica

基　　金：国家自然科学基金项目(41171177)资助

摘　　要：选取河南省和江苏省的6个典型县域作为研究区,在1 km×1 km网格尺度下采用空间粒度方法研究优势土属(DSF)和稀有土属(RSF)的土壤多样性值、3个研究时期空间分布面积指数(MSHDAI)和空间分布长度指数(MSHDLI)的粒度响应类型和4个指数间的关联性和相关关系的粒度响应及稳定性。结果表明:土壤DSF和RSF多样性值对空间粒度的响应基本上属于"无响应型",且RSF空间位置位于研究区边缘时随着粒度的增大而影响土壤多样性的稳定性;地表水体多样性MSHDAI和MSHDLI指数对粒度的响应均属于"下降型",二者间及二者平均值间的尺度效应关系为多项式函数时,拟合度最高;2000—2013年间,襄城县和吴江区土壤和地表水体多样性间的相关性类型为稳定型,二者相关关系的粒度效应有显著正、负相关两种,且相关性均未发生本质性变化,具有一定的稳定性。林县、固始县和溧水县为不稳定型,如皋市由于水网密度过大未表现出相关性。由此可知,研究区的地形、水体形态和密度及人类活动干扰等是影响土壤和地表水体多样性关系的主要因素。Six counties, typical of Henan and Jiangsu are selected in a case study on application of the spatial grain size method on a 1 km x 1 km grid scale to exploration of soil diversity of dominant and rare soil families （DSF and RSF）, type of grain size effects on MSHDAI and MSHDLI, and grain size effects on correlativity and correlations between the four indices and their stabilities. In terms of soil diversity, soil families, the highest in diversity index and in soil patch area as well are deemed as dominant ones. Counties dominated with plains in terrain are the lowest in number of soil families, while those dominated with hills are the highest. For instance, in Rugao County, the water network, being too high in density, plays a unique role in the study on correlativity between pedodiversity and surface water body diversity. With rising spatial grain size, the grain size effects on both DSF and of RSF fall basically into the type of ＂non- responsive＂ , suggesting that the two indices are not sensitive to changes in spatial grain size, or that they are relatively stable. However, when RSF is located at the edge of the study area, soil patches change in shape with grain size, which in turn affects stability of the pedodiversity. In the research of surface water body diversity, the effects of grain size on MSHDAI and MSHDLI are both of the ＂declining type＂ . In the study areas, regardless of research period, the relationships in terms of scale effect between MSHDLI and MSHDAI and between their means are all polynomial functions, which indicates that as time goes on, changes of the water bodies in either area or shape do not affect the fitted functional relationship between the two indices. With rising spatial grain size, the correlations between pedodiversity and the surface water body diversity exist in two types, ＂stable type＂ （ including unchanged significant positive correlationship, unchanged significant negative correlationship and unchanged non-existence of significant correlationship ） an

关 键 词：土壤 地表水体 多样性 粒度 关联性 尺度效应 

分 类 号：S151[农业科学—土壤学] K928.4[农业科学—农业基础科学]