农业环境科学学报Issue(9)：1761-1768,8.DOI:10.11654/jaes.2015.09.019
不同土地利用方式及施肥措施对红壤木质素积累特性的影响
Effects of Land Use and Fertilization on Lignin Accumulation in Red Soil
摘要
Abstract
Lignin is an important component in soil carbon cycle, and plays a particular role in the carbon storage. Lignin phenol content was calculated as the sum of vanillyl(V), syringyl(S), and cinnamyl(C)type phenols. To investigate the effect of long-term fertilization on lignin accumulation in agricultural soils, lignin content and its monomer composition were determined in upland and upland-paddy rotation fields under different fertilization practices[chemical fertilizer(NPK), combined straw and NP(S+NP)] in a subtropical red soil region. Soil pH, soil organic matter, and total nutrient content, and key enzymes were also determined. Results showed that both NPK and S+NP fertiliza-tion increased lignin content(VSC). The average accumulation rate of lignin in the upland was(17.67±0.87)μg·g-1·a-1 and(126.48±0.03)μg·g-1·a-1 for NPK and S+NP, respectively, while it was correspondingly(8.15±1.39)μg·g-1·a-1 and(119.85±3.10)μg·g-1·a-1 in upland-paddy rotation field. Long-term fertilization significantly increased the proportion of relative unstable cinnamyl(C)type monomer(P<0.05), with lower values in the rotation field than that in upland, suggesting that the composition of lignin monomers in the rotation field was more stable than in upland. Land use and fertilization significantly influenced soil nutrient, enzyme activity and lignin monomer content. Land use and fertilization interaction had significant effect on the content of V and C type monomers(P<0.01). Both correlation and RDA analysis showed that soil organic matter, nitrogen(total nitrogen and available nitrogen, P<0.05), and available potassium(P<0.01)were the key factors determining the lignin accumulation. Therefore, the influences of nitrogen and available potassium on lignin accumulation should be considered when studying the sequestration and turnover of organic carbon in red soil.关键词
长期施肥/土地利用方式/红壤/木质素/单体/积累特性Key words
long-term fertilization/land use/red soil/lignin/monomer/accumulation characteristics分类
农业科技引用本文复制引用
冯书珍,陈香碧,何寻阳,董明哲,邱虎森,黄道友,曾希柏,苏以荣..不同土地利用方式及施肥措施对红壤木质素积累特性的影响[J].农业环境科学学报,2015,(9):1761-1768,8.基金项目
国家科技支撑计划项目（2012BAD05B06）；国家自然科学基金青年基金（41301273）；国家自然科学基金重点项目（41430860）；中国科学院西部之光人才培养计划“西部博士资助项目” （）
