北京开花竹林土壤主要养分分析

Analysis on Main Soil Nutrients of Flowering Bamboo Forest in Beijing

采用对比分析法,研究了北京市早园竹开花竹林和正常竹林土壤主要养分含量的差异。结果表明:开花竹林土壤中氮肥和磷肥含量明显低于正常竹林,钾肥含量没有明显差异;随着土壤深度增加,土壤中氮、磷、钾肥含量明显降低,尤其是竹鞭和竹根集中分布的10~30 cm深的土层,土壤养分严重亏缺。因此,在竹林经营中,应以"补氮提磷"为土壤养分管理目标,同时将10~30 cm深的土层作为竹林施肥的"目标土层",积极探索有效的竹林施肥和土壤改良技术。

The paper studied the difference in content between main soil nutrients of flowering bamboo( Phyllostachys propinqua) forest and normal bamboo forests. The results showed that the flowering bamboo forest had the lower content in P and N than normal ones,while K presented no obvious difference in content. When the soil depth increased,the N,P and K content in soil decreased evidently,especially in the soil at 10-30 cm deep,where the rhizomes and roots concentratedly distributed. Therefore,adding N and P should be the soil nutrients improvement goal and the soil layer at 10-30 cm deep be the targeted soil layer of the fertilization in the bamboo forest management,in order to the explore the effective bamboo forest fertilization and soil improvement technology.