南昌工程学院学报2018，Vol.37Issue(3)：6-11,6.
长期模拟氮沉降对杉木人工林土壤养分含量的影响
Nutrient concentrations of soils under Chinese fir plantation in response to long-term nitrogen deposition
摘要
Abstract
In order to study the effects of nitrogen(N)deposition on soil macroelements and microelements concentration at three soil depth(0-5 cm,5-20 cm and 40-55 cm),a long-term field simulated N additions experiment was conducted at four levels,N0(control),N1,N2,N3 with the doses of 0,60,120,and 240 kg·N·hm-2·a-1respectively. A fifth treat-ment,NR,240 kg·N·hm-2·a-1,was terminated after two years,allowing assessment of recovery during 11 yearing. CO (NH2)2was used as the source of N. The results show that soil elemental concentration decreased in the sequence of Al＞Fe＞Mn＞C＞Ca＞K＞N＞P＞Mg. With the increasing soil depth,soil C,N,P content decreased,while Al increased. N dep-osition decreased soil pH while increased soil N and Al contents. N1 promoted soil C,N2 increased soil Fe content. Worth emphasizing was that NR(11 years after termination of N3 treatment)can alleviate the change of soil pH and N. NR de-creased soil C but increased Ca,Mg,Mn. Pearson correlation coefficient shows that significant correlation was established between soil element contents,soil C with P,Mg,Al,Fe,and Mn,soil N with K,soil pH with P and Ca.关键词
长期氮沉降/杉木人工林/大量元素含量/微量元素含量Key words
long-term nitrogen deposition/Chinese fir plantation/macroelements concentration/microelements concentration分类
资源环境引用本文复制引用
苏兵强..长期模拟氮沉降对杉木人工林土壤养分含量的影响[J].南昌工程学院学报,2018,37(3):6-11,6.基金项目
江西省教育厅科技项目(GJJ161118) （GJJ161118）
国家自然科学基金资助项目(31360175) （31360175）
江西省主要学科学术和技术带头人项目(20162BCB22021) （20162BCB22021）
