纳雍珙桐自然保护区湿地土壤化学性状研究

Chemical Property of the Wetland Soil in Nayong Nature Reserve of Davidia involucrate Baillon

通过对纳雍珙桐自然保护区内不同湿地类型的土壤化学性状及腐殖质特征进行测定、分析，结果表明：1）不同湿地类型的土壤pH值在4．43～5．44之间，均为酸性土壤；土壤有机质、全N、水解N、全P、有效P、全K和速效K的平均含量分别为：162．74g／kg、5．25g／kg、362．52mg／kg、1．23g／kg、4．4ling／kg、8．83g／kg和60．83mg／kg；2）土壤腐殖酸及其组分HA和FA的平均含量分别为56．69g／kg、39．27g／kg和17．42g／，kg，占腐殖质全c量的62．52％、40．74％和21．78％；HA／FA比值在0．55～4．34之间，平均值为2．87；3）综合不同湿地类型土壤化学性状及腐殖质特征的分析结果：以藓类沼泽的土壤有机质、全N、水解N、有效P、全K的含量最大，土壤腐殖质化程度也最高，综合表现为最好。

In this study, the soil chemical property and the characteristics of humus of different wetland types in Nayong Nature Reserve for Davidia involucrate were measured and analyzed. The results were as follows ： 1 ） the soil of different wetland types were all acid, with the pH values between 4. 43 and 5.44 ; the average contents of organic matter, total nitrogen, rapidly available nitrogen, total phosphorus, rapidly available phosphorus, total potassium and rapidly available potassium were 162.74g/kg, 5.25g/kg, 362. 52mg/kg, 1.23g/kg, 4. 41mg/kg, 8.83g/kg and 60. 83mg/kg, respectively; 2） averagely, the total contents of the soil humic acid and its two components HA and FA were 56.69g/kg, 39.27g/kg and 17.42g/kg, respectively, accounting for 62. 52%, 40. 74% and 21.78% of the SOC, respectively; the HA/FA ratio was between 0.55 and 4.34 with an average value of 2. 87; 3 ） according to the comprehensive analysis on soil chemical properties and humus characteristics of different wetlandtypes, the moss bog had the highest quality of soil, since the average contents of organic matter, total nitrogen, phosphorus, total potassium, and the degree of humification under the moss bog environment were the highest.