期刊论文

中文

土壤

0253-9829

2022

54

2

338-343

10.13758/j.cnki.tr.2022.02.017

41571211:国家自然科学基金 15A085:湖南省高校科学研究重点项目

本校为第一机构

利用自1981年开始的红壤性水稻土长期定位试验,对耕层土壤有机碳活性组分、孔隙状况及团聚体进行分析,以探究不同地下水位(20、80 cm)和施肥(高量有机肥、常量有机肥、化肥)管理对红壤性水稻土有机碳活性组分的影响,并分析孔隙状况和团聚体对土壤有机碳活性组分的作用关系。结果表明:降低地下水位导致高量有机肥和化肥处理的轻组有机碳(LFOC)和颗粒有机碳(POC)含量显著降低,各处理的易氧化有机碳(EOC)含量则显著升高;长期施用有机肥显著提高土壤LFOC、EOC和POC的含量;双因素方差分析显示,施肥对有机碳活性组分的影响大于地下水位。红壤性水稻土粗大团聚体可促进毛管孔隙的形成,从而保护或稳定LF...

A long-term field experiment was conducted since 1981 in order to explore the effects of underground water table and organic manure on labile carbon fractions(light fraction organic carbon,LFOC;easily oxidized carbon,EOC;and particulate organic carbon,POC)as well as the interaction relation of aggregates and porosity on labile carbon fractions,the treatments included two underground water tables of 20 cm and 80 cm,applying organic manure with a high rate(HOM)and a normal rate(NOM),and applying chemical fertilizer(CF).The results showed that lowering underground water table resulted in signific...