南京林业大学学报（自然科学版）2017，Vol.41Issue(5)：7-12,6.DOI:10.3969/j.issn.1000-2006.201607039
模拟氮沉降对典型阔叶红松林土壤微生物群落特征的影响
Effects of simulated nitrogen deposition on soil microbial biomass carbon and nitrogen in a mixed broadleaf Korean pine forest
摘要
Abstract
[Objective]This study explored the effects of increasing nitrogen deposition on soil microorganisms in a mixed broadleaf Korean pine ( Pinus koraiensis) forest.[Method]A simulated nitrogen deposition experiment was performed in a mixed broadleaf Korean pine forest. Nitrogen deposition levels were contacted as control ( N0, 0 kg/( hm2·a) ) , low N ( N1, 30 kg/( hm2·a) ) , medium N ( N2, 60 kg/( hm2·a) ) , and high N ( N3, 120 kg/( hm2·a) ) . Soil samples were collected from 0-10 cm and≥10-20 cm soil layers monthly from mid?May to mid?September in 2014, and soil microbi?al biomass carbon ( SMBC) and soil microbial biomass nitrogen ( SMBN) were measured.[Result]First, the simulated nitrogen deposition did not influence the vertical changes of SMBC, SMBN, or SMBC/SMBN; seasonal changes of SMBC and SMBN between the four treatments plots during the growing season showed a unimodal curve;and the season?al dynamics of SMBC/SMBN were obvious and their ranges were different. The 0-10 cm soil layer in the N0 treatment plot had the smallest range ( 283-697) . Second, the simulated nitrogen deposition significantly affected the SMBC in June and August in the 0-10 cm layer and the SMBC/SMBN of May, June, and August in the 0-10 cm layer ( P<005) . However, the simulated nitrogen deposition did not significantly affected seasonal averages of SMBC, SMBN and SMBC/SMBN.[Conclusion]There was a obvious effect of simulated nitrogen deposition on soil microbial biomass in the mixed broadleaf Korean pine forest in some specific months. However, to find a distinct effect throughout the whole grow?ing season would require longer simulated nitrogen deposition.关键词
氮沉降/土壤微生物生物量碳(SMBC)/土壤微生物生物量氮(SMBN)/阔叶红松林Key words
nitrogen deposition/soil microbial biomass carbon ( SMBC )/soil microbial biomass nitrogen ( SMBN )/mixed broadleaf Korean pine forest分类
农业科技引用本文复制引用
宋蕾,林尤伟,金光泽..模拟氮沉降对典型阔叶红松林土壤微生物群落特征的影响[J].南京林业大学学报（自然科学版）,2017,41(5):7-12,6.基金项目
中央高校基本科研业务费专项资金项目(2572017EA02) （2572017EA02）
