古树周边植物的种植对其土壤的影响

The Plants Made Impact on the Soil Surrounding Old Trees

摘要: 在古树周边土壤中种植毛杜鹃、黄馨、吴凤草和麦冬，测试种植植物前和种植后的土壤密度、pH值、土壤EC、土壤有机质和土壤中的细菌总数、真菌和放线菌数量。测试结果表明：在古树周边土壤种植此4种植物，可以降低土壤的密度、pH值的数值；增加土壤中的EC值；除麦冬外，种植其它三种植物能增加土壤的有机质含量，其中种植黄馨提高效果最好；在古树旁种植植物可以明显提高土壤中细菌总数、真菌和放线菌的数量，其中细菌的总数数量增加最多；在细菌总数和放线菌增加方面，黄馨表现优于毛杜鹃、吴凤草和麦冬表现；在真菌方面，吴凤草的表现优于麦冬、毛杜鹃和黄馨的表现。

Abstract: Around the old trees were planted with the Rhododendron pubescens, Jasminum mesnyi, Farfugium japonicum and Ophiopogon japonicus , then test bulk density, pH value of the soil, soil EC, soil organic matter and total bacteria in soil, fungi and actinomycetes. The result showed that: these four kinds of plants can effectively reduce the soil bulk density, pH value, increase the EC value in the soil. In addition to Ophiopogon japonicus, other three kinds of plants can increase the content of organic matter in the soil, among which, planting Jasminum mesnyi has the best effect. At the same time, planting around ancient trees can obviously increase the total number of bacteria, fungi and actinomycetes in the soil, among them, the total number of bacteria increased the most; in the total number of bacteria and the increase of actinomycetes, the performance of Jasminum mesnyi was better than that of Rhododendron pubescens, Farfugium japonicum and Ophiopogon japonicus; in the aspect of fungi, the performance of Farfugium japonicum was better than that of Ophiopogon japonicus, Rhododendron pubescens and Jasminum mesny.