施氮肥模拟氮沉降对油松天然次生林土壤特性的短期影响

Short-term Effects of Nitrogen Fertilizer Simulated Nitrogen Deposition on Undergrowth Soil Properties in Natural Secondary Forest of Pinus tabuliformis

以吕梁市离石区吴城镇油松天然次生林为对象,通过对比2个施氮肥模拟氮沉降试验,从林下土壤属性分析了氮沉降对油松天然次生林的影响。结果表明:氮沉降对土壤属性具有一定影响,不同氮沉降强度下,土壤铵态氮、硝态氮和有机碳含量均有所提高,而全氮含量和pH变化不大。

Grasping the influence of nitrogen deposition on the soil properties of the natural secondary forest of Pinus tabuliformis can provide a theoretical basis for the sustainable management of Pinus tabuliformis forest.The natural secondary forest of Pinus tabuliformis in Wucheng District,Lishi District,Lyuliang City,was compared with two nitrogen application experiments,and the influence of nitrogen deposition on the natural secondary forest of Pinus tabuliformis was analyzed from the properties of the understory soil.The following basic conclusions were obtained:Soil properties have a certain influence.Under different nitrogen deposition intensities,the content of ammonium nitrogen,nitrate nitrogen and organic carbon in the soil all increase,but the total nitrogen content and pH value did not change much.