土壤学报2013，Vol.50Issue(3)：525-533,9.
侵蚀程度对不同粒径团聚体中养分含量和红壤有机质稳定性的影响
EFFECT OF EROSION ON NUTRIENT CONTENT IN AGGREGATES OF DIFFERENT PARTICLE-SIZE FRACTIONS AND STABILITY OF ORGANIC MATTER IN ULTISOLS
摘要
Abstract
Contents and distributions of nutrients (total N,total P,total K and OM) and organic carbon of different forms (ready-to-oxidize and hard-to-oxidize) in water-stable aggregates (＞ 0.25 mm) in ultisols different in erosion degree (slight,medium and severe) were studied.Results show that with erosion aggravating,the contents of nutrients (OM,total N and total P) in water-stable aggregates (＞ 0.25 mm) gradually decreased.In terms of contribution to the total of soil nutrients,various fractions of water-stable aggregated a sequence of [＞ 4 mm] ＞ [0.5 ～ 1 mm] ＞ [1 ～2 mm] ＞ [2 ～ 4 mm] ＞ [0.25 ～ 0.5 mm].The contents of total N,total P and OM were significantly and positively related to the content of ＞ 0.25 mm water-stable aggregates.The contents of soil total organic carbon,readily-oxidation and hard-oxidation organic carbon took on a falling trend with the enhancing of erosion degree and had the marked positive correlation with ＞ 0.25 mm water-stable aggregates,OM,total N and total P,while oxidation stability coefficient of organic matter was negatively related to the contents of water-stable aggregates of various fractions,OM,total N and total P.关键词
侵蚀红壤/养分/水稳性团聚体/易氧化碳/难氧化碳/有机质氧化稳定性Key words
Eroded ultisol/Nutrients/Water-stable aggregate/Ready-to-oxidize carbon/Hard-to-oxidize carbon/Organic oxidation stability分类
农业科技引用本文复制引用
董雪,王春燕,黄丽,谭文峰,胡红青..侵蚀程度对不同粒径团聚体中养分含量和红壤有机质稳定性的影响[J].土壤学报,2013,50(3):525-533,9.基金项目
国家自然科学基金项目(40971143)和中央高校基本科研业务费专项基金(2012SC30)资助 （40971143）
