模拟氮沉降对华北落叶松人工林土壤氮含量的短期影响  

Short Term Effects of Simulated Nitrogen Deposition on Soil Nitrogen Content in Larix Principis-rupprechtii Plantation

作　　者：胡芳[1] 徐美丽[1] 刘婷[1] HU Fang XU Meili LIU Ting(College of Information, Shanxi Agricultural University, Taigu 030800, Chin)

机构地区：[1]山西农业大学信息学院,山西太谷030800

出　　处：《山西农业科学》2017年第4期596-598,共3页Journal of Shanxi Agricultural Sciences

摘　　要：为研究氮沉降对土壤氮含量的影响,以关帝山华北落叶松人工林为研究对象,分别设置浓度为0(CK),80(LN),150 kg/hm^2(HN)_3个施氮水平进行短期氮输入试验。结果表明,在氮输入影响下,显著增加了华北落叶松林下0~10,10~20 cm土壤层中NH_4^+-N,NO_3^--N的含量,尤其对0~10 cm土壤的影响更明显,且在整个生长季内月份间的变化较大;各样方林下0~10,10~20 cm土壤全氮含量在各处理间没有显著差异,但是仍有一定的增长趋势。To study the effect of nitrogen deposition on soil nitrogen content, taking Guan Mountain in the northern part of the larch plantation forest as the object, the paper sets up the contrast （CK, 0 kg/hm2）, low nitrogen （LN, 80 kg/hm2）, high nitrogen （HN, 150 kg/hm2） three nitrogen levels on short-term nitrogen input experiment. The results showed that after the whole growing season of short-term nitrogen treatment, the NH4＋-N, NOf-N concentration were significantly increased in 0-10, 10-20 cm two layers soil, especially for surface（0-10 cm） the influence of the soil was more noticeable, and the large variation between month throughout the growing season. TN concentration was no significant difference in 0-10, 10-20 cm soils, but there was still some growth trend.

关 键 词：氮沉降 华北落叶松人工林 土壤氮含量 短期影响 

分 类 号：S714.5[农业科学—林学]