红心杉根际土壤与非根际土壤养分差异研究

The difference of soil nutrients of rhizosphere and non-rhizosphere soil of Larix potaninii plantation

对江西省南昌市湾里区红心杉林根际土壤与非根际土壤养分差异进行研究。结果表明:不同年龄的红心杉林分,其根际土壤与非根际土壤的养分均存在差异,林分年龄与土壤类型的交互效应均极显著。pH和有效磷、有机质含量在林分年龄和土壤类型间都存在极显著差异;碱解氮、全氮、速效钾含量在林分年龄间存在极显著差异,在土壤类型间无显著差异;全磷含量在林分年龄间存在极显著差异,在土壤类型间存在显著差异。红心杉非根际土壤的养分在20、40年生的变化很小,而根际土壤的全氮、全磷、速效钾含量差异仍然明显。

The research of the difference of soil nutrients of rhizosphere and non-rhizosphere of Larix potaninii plantation was in Wanli District of Nanchang City. The results showed that there is very significant difference of soil nutrients of rhi- zosphere and non-rhizosphere of Lar/x potaninii plantation in different ages, and it＂ also in interaction effect between ages and soil types. The pH, P and organic matter contents in different ages and soil types has very significant difference. The available N, total N and available K contents in different ages has very significant difference, and it in soil types has sig- nificant difference. The total P content in different ages has very significant difference, and in soil types has significant difference. There is no obvious change of soil nutrients in non-rhizosphere soil of Larix potaninii plantation in 20 and 40 year-old, and the total N, total P and available K content of rhizosphere soil has very significant difference. K