滇黄精不同林分复合种植模式对土壤理化性质的影响

为探寻合适的林药复合种植模式，在昆明市海口林场选择华山松+滇黄精、油橄榄+滇黄精、核桃+滇黄精3种不同林药复合种植模式，1.5年后对3种林药复合种植模式下的土壤有机质、氮、磷、钾含量进行对比分析。结果表明：华山松+滇黄精复合模式林地土壤肥力得到提高，其中土壤有机质、全氮、有效磷和全钾提高较为明显；油橄榄+滇黄精复合模式对林地土壤有效磷、速效钾含量的影响较大，其余指标差异不明显，土壤总体肥力变化也不明显；核桃+滇黄精复合模式林地土壤除速效钾和全钾含量提高外，其余指标含量均下降。林下种植滇黄精对土壤理化性质有影响，且不同林分复合种植模式下的影响差异明显，其中以华山松+滇黄精复合模式对土壤理化性质有明显的改善作用，适合推广。

Effects of compound planting patterns of different forests intercropping with Polygonatum kinganum on soil physicochemical properties

In order to explore the suitable tree-medicinal plant intercropping, in Kunming Haikou Forest Farm, different compound management modes were selected: Pinus armandii+Polygonatum kinganum , Olea europaea+Polygonatum kinganum , Juglans reiga+Polygonatum kinganum .After 1.5 years, the? contents of soil organic matter, N, P and K of the three tree-medicinal plant intercropping were determined and compared .The results showed that there were significant differences in other physicochemical properties except hydrolyzed N in different stands of Polygonatum kinganum compound model. The soil fertility of P+P model was improved, and the organic matter, total N, fast P and total K were most significantly improved; The soil fertility of O+P model forest land has a great impact on the speed P and K, the other differences are not obvious, and the overall soil fertility changes are not obvious; In J+P mode, except for the increase of speed K and total K, the overall content of the rest decreased. Therefore, it is believed that the planting of Polygonatum kinganum under the forest has an impact on the physicochemical properties of soil, and the impact of different plant intercropping is significantly different, among which the physicochemical properties of soil after the P+P compound planting mode is significantly improved, which is suitable for popularization.