【摘要】 在沙坡头人工固沙植被区,调查了掘穴蚁蚁穴密度在不同固沙年代和不同地形的分布,并研究了蚁穴密度与土壤参数的关系.研究结果表明:地形、固沙年代及其互作显著影响掘穴蚁的蚁穴密度.随着固沙年代的延长,掘穴蚁的蚁穴密度增加;不同地形之间的大小顺序为:丘间地>迎风坡>丘顶>背风坡;蚁穴密度与土壤沙粒含量(P<0.05)和土壤容重(P<0.01)呈负相关,与土壤粘粒(P<0.05)、全钾(P<0.05)、CaCO3(P<0.05)、全氮(P<0.01)、有机质(P<0.01)、盐分(P<0.01)和结皮厚度(P<0.01)呈正相关.更多还原

【Abstract】 The distribution of the ant-nest density of Formica cunicularia along with different sand-fixing ages and topography in Shapotou artifical sand-fixing vegetation area were investigated,meanwhile the relationship between ant-nest density and soil parameters was researched.The results showed that the topography,sand-fixing ages and their interaction had significant effects on the ant-nest density of Formica cunicularia.The ant-nest density of Formica cunicularia increased along with sand-fixing ages.Different topographic types were arranged in order of the ant-nest density as follows:hollow > windward slope>dune top>leeward.In addition,the ant-nest density displayed negative correlation to the sand content of soil(P<0.05)and the bulk density(P<0.01),but on the contrary,it presented positive correlation to the soil clay(P<0.05),total K(P<0.05),CaCO3(P<0.05),total N(P<0.01),organic matter(P<0.01),total soluble salt(P<0.01)and thickness of crust(P<0.01)in the soil.更多还原