广东肇庆3种珍贵树种人工林土壤酶活性及养分状况分析

Analysis of Soil Enzyme Activity and Nutrient Status of Three Precious Tree Species Plantations in Zhaoqing of Guangdong Province

为珍贵树种人工林管理提供依据,以黑木相思、红锥、火力楠人工林作为研究对象,对其土壤基本理化性质、全量养分含量、速效养分含量、酶活性进行测定分析,并进行组间比较。结果表明:红锥人工林土壤状况优于火力楠和黑木相思人工林,3种珍贵树种人工林土壤有机质含量比较高,全量养分含量、速效养分含量均处于缺乏水平,且3种人工林土壤酶活性与土壤养分指标相关,均表现为蔗糖活性高于其他酶活性。在3种珍贵树种人工林中,红锥人工林养分状况优于火力楠和黑木相思。

In order to provide a basis for the management of precious tree species plantations,the basic physical and chemical properties,total nutrient content,available nutrient content and enzyme activity of Acacia melanoxylon,Castanopsis hystrix and Michelia macclurei plantations were measured and analyzed,and the comparison between groups was carried out.The results showed as follows:the soil condition of Castanopsis hystrix plantation was better than that of Michelia macclurei plantation and Acacia melanoxylon plantation;the soil organic matter content of the three precious tree species plantations was higher,and the total nutrient content and available nutrient content were at the deficiency level;moreover,the soil enzyme activity of the three kinds of plantations was related to the soil nutrient index,and the sucrose activity was higher than other enzyme activities.In the three precious tree species plantations,the nutrient status of Castanopsis hystrix plantation is better than that of Michelia macclurei plantation and Acacia melanoxylon plantation.