应用生态学报2017，Vol.28Issue(5)：1661-1667,7.DOI:10.13287/j.1001-9332.201705.006
长期施肥对潮棕壤有机氮组分的影响
Effects of long-term fertilization on organic nitrogen fractions in aquic brown soil
摘要
Abstract
The purpose of present research was to investigate how different fertilization regimes altered soil organic nitrogen fractions and their inter-annual dynamics based on a series of long-term experiment (initiated at 1990),including:CK (non-fertilization);M (recycled pig manure);NPK (chemical fertilizer NPK);NPK + M (recycled pig manure with chemical fertilizer NPK).The results showed that soil organic nitrogen components under the different fertilization treatments presented contrastive patterns from the establishment the experiments to 2015.Generally,acid hydrolysable organic nitrogen content increased year by year.The amino acid nitrogen content under CK and NPK treatments consistently declined,although amino acid nitrogen for M and NPK+M treatments showed a increasing trend.These phenomena were probably ascribed to the utilization of soil amino acids by microbes.From 1990 to 2015,NPK treatment substantially elevated the content of acid-released ammonium nitrogen by 31.1％ compared with CK (mean value across the experiment),and for the treatments using organic manure (M and NPK+M),the contents of all fractions of soil organic nitrogen increased.Notably,the increase magnitudes for NPK+M were more dramatic than those of M.These results demonstrated that combined use of organic and inorganic fertilizers could more effectively elevate soil organic nitrogen,subsequently helping to improve the capacity of soil nitrogen supply and enhance the soil fertility.关键词
潮棕壤/土壤有机氮组分/长期施肥Key words
aquic brown soil/soil organic nitrogen form/long-term fertilization引用本文复制引用
任金凤,周桦,马强,徐永刚,姜春明,潘飞飞,宇万太..长期施肥对潮棕壤有机氮组分的影响[J].应用生态学报,2017,28(5):1661-1667,7.基金项目
本文由国家科技部支撑计划项目(2012BAD05B01)和国家自然科学基金项目(41471250,41301326)资助 This work was supported by the National Key Technology R&D Program (2012BAD05B01),and the National Natural Science Foundation of China (41471250,41301326). （2012BAD05B01）
