临安市不同乡镇山核桃林地土壤理化性质比较

Comparison of Soil Physiochemical Properties at Carya cathayensis Stands in Lin’an

采集临安市山核桃（Caryacathayensis）产区8个乡镇共321个土壤样品，分析其主要理化性质。结果表明，不同乡镇山核桃林地土壤理化性质受成土母岩和人为经营的影响，具有一定的差异性，其中太湖源镇林地土壤容重ld,，仅为0．9g／cm3，总孔隙度最大，为65．86％；昌化、河桥、龙岗3个乡镇土壤砂粒（2-O．02mm）含量较高，大于30％，而粉粒（0．002～0．02）含量则较低，小于46．0％；土壤pH值以河桥镇为高，pH6．17，太湖源镇最低，pH4．81；土壤有机围冶量以岛石镇和太湖源镇为高，分别达38．00、35．54g压唔，而河桥镇最低，为23．95g／kg；昌化、岛石、太湖源3个乡镇水解氮、速效钾含量较高，分别达200．00、100．00mg/kg；土壤旮故磷和有效硫含量以岛石镇为最高，分别为10．80，24．90mg/kg；不同乡镇山核桃林地土壤微量元素平均含量排序为锰〉铁〉锌〉硼〉铜，土壤有效锰、铁、铜含量以岛石镇山核桃林地土壤较高，分别为62．46、26．88、1．30mg/kg，而有效锌、硼则以清凉峰镇为高，含量分别为2．26，1．77mg/kg。

Detection and analysis were made on physiochemical properties of 321 soil samples from Carya cathayensis stands in 8 towns and villages of Lin＇an, the most famous hickory production area, Zhejiang province. The results showed that soil bulk density was the smallest（0.9g/cm3） but with the biggest total porosity （65.86%） in Taihuyuan. Sand content occupied more than 30% in Changhua, Heqiao and Longgang, but with the lowest silt content of 46.0%. The highest pH value was detected in Heqiao （6.17）, and the lowest in Taihuyuan（4.81）. Content of soil organic matter in Daoshi and Taihuyuan topped 38.00 and 35.54 g/kg. The content of hydrolytic nitrogen, available potassium in the soil was higher as 200.00 and 100.00 mg/kg in Changhua, Daoshi and TaJhuyuan. Availability phosphorus and sulfur were 10.80 mg/kg and 24.90rng/kg in Daoshi. The mean content of trace elements in the soil of different town was as follows： Mn 〉 Fe 〉 Zn 〉 B 〉 Cu. The content ofMn, Fe and Cu was higher in Daoshi than that in other towns, respectively 62.46, 26.88, 1.30 mg/kg, the content of Zn and B was higher in Qingliangfeng, respectively 2.26, 1.77 mg/kg.