摘要
研究了城市不同硬化地面类型（水泥地面、水泥砖面和踏实土地面）对悬铃木物质循环、水分循环及营养元素（Ｎ，Ｐ，Ｋ）循环的影响。结果表明：自然降水在城市水泥地面，水泥砖面或坚实的地表上很容易形成较大的地表径流，其中以水泥地面最甚，达４８％；各类型地面对雨水的渗透能力有明显差异，对照（花坛土）最强，为８７６％，踏实土（７２８％）次之，水泥砖面较差（３３％），水泥地面渗透量接近于零。城市土壤营养元素除Ｋ外，Ｎ，Ｐ含量以踏实土最高，分别为００７７７和００８６６，其次为水泥砖面（００６９９和００５８７）及水泥地面（００５６２和００６３１）；生产力排序为：踏实土＞水泥砖面＞水泥地面。树木对土壤养分的吸收量也呈现相似的趋势，表现为：吸收量越大，理论归还量越大，但由于实际归还量较小，则土壤亏损就较多。
Studies were carried out on the effects of different hardened grounds,namely cement ground,cementblock ground and compressed ground on the material recycling,water recycling and the nurient elements of Platanus acerifolia (Ait)wild.The results show that most of the rainfall in the urban areas becomes surface run-off,especially on the cement ground,and the infiltration is almost none on the cement ground. Nutrients and water in the soil affect absorption and growth of trees.It is found that N,P,K concentration in one-year,two-year,three-year is and older branches of the trees on the compressed ground is higher than that on the other two types.So is the productivity and the absorption of soil nutrient on the compressed soil.The fact is that the more the tree absorbs,the more the theoretical return is,but when the practical return is less,the nutrient shortage of urban soil will become more serious.
出处
《河南农业大学学报》
CAS
CSCD
1998年第4期314-319,共6页
Journal of Henan Agricultural University
关键词
悬铃木
城市土壤
硬化地面
生物循环
营养元素
Platanus acerlfolia (Ait)wild
hardened ground
urban soil
biocycling
natrient element
productivity
