CAJ | 학술논문

自杭州城区选择了102个代表性绿地表层土壤，研究了不同类别绿地表土物理、化学和肥力性状。结果表明：城市绿地不同于农地和自然林地，具有较高的＞5 mm砾石含量和较高的容重及较低的孔隙度；其土壤pH值、有效磷、速效钾和重金属含量均较高。城市绿地土壤有机质和全氮低于自然林地，但高于一般农用地。土壤容重和坚实度以绿地间的露地土壤最高，其次为草坪和乔木地，灌木/花草地和树池土壤较低。总体上，杭州城市绿地土壤CEC以中下为主，有机质和全氮以中等为主，有效磷和速效钾较为丰富，重金属呈现轻度污染；pH值以中性为主，质地以壤土为主，比较适合植物的生长，但该市多数绿地土壤容重较高，这可能是该市绿地对植物生长和土壤透水性的主要限制因素。
자항주성구선택료102개대표성록지표층토양，연구료불동유별록지표토물리、화학화비력성상。결과표명：성시록지불동우농지화자연임지，구유교고적＞5 mm력석함량화교고적용중급교저적공극도；기토양pH치、유효린、속효갑화중금속함량균교고。성시록지토양유궤질화전담저우자연임지，단고우일반농용지。토양용중화견실도이록지간적로지토양최고，기차위초평화교목지，관목/화초지화수지토양교저。총체상，항주성시록지토양CEC이중하위주，유궤질화전담이중등위주，유효린화속효갑교위봉부，중금속정현경도오염；pH치이중성위주，질지이양토위주，비교괄합식물적생장，단해시다수록지토양용중교고，저가능시해시록지대식물생장화토양투수성적주요한제인소。
In this paper , 102 representative greenbelt surface soil samples were selected from Hangzhou urban area , and the physical, chemical and fertility properties of the surface soils in different types of greenbelts were investigated .The results showed that the urban greenbelt was different from farmland and natural forest land , it had higher gravel ( >5 mm) content, higher bulk density and lower porosity , and its soil pH -value, available phosphorus , rapidly available potassium , and heavy metal contents were higher .The contents of soil organic matter and total nitrogen in urban greenbelt were lower than those of natural forest land , but they were higher than those of the common farmland .The soil bulk density and compactness of the open soils between greenbelts were the highest , followed by those of lawn and arbor land , while they were lower in bush/flower grassland and tree grate .Overall , the soils in greenbelt of Hangzhou city had middle -low CEC, medium contents of organic matter and total nitrogen , and high con-tents of available P and K .Heavy metals in the soils showed slight pollution .The soils primarily had neutral pH -value and the tex-ture of loam.The above soil properties were more suitable for the growth of plants .However, most greenbelts in this city had higher soil bulk density , which might be the main factor restricting plant growth and water permeability .