浙江农业学报2026，Vol.38Issue(4)：720-730,11.DOI:10.3969/j.issn.1004-1524.20250617
外源有机物料长期施用对黄泥田团聚体稳定性和有机碳氮积累的影响
Effects of exogenous organic materials amendments on soil aggregate stability and accumula-tion of organic carbon and total nitrogen in yellow clayey paddy soil
摘要
Abstract
To investigate the effects of long-term application of different organic materials on the stability of soil ag-gregates and the contents of organic carbon and total nitrogen in soil aggregates of yellow clayey paddy soil,a field plot experiment was carried out in a rice paddy field in Jinhua City,Zhejiang Province of China from 2011 to 2023.Three treatments were designed in the experiment,namely chemical fertilizer alone(NPK),combined application of chemical fertilizer and straw with rapid decomposer(RS),and combined application of controlled-release bulk-blen-ded(BB)fertilizer and decomposed cow manure(CM).Topsoil(0-20 cm)samples were collected after the late rice harvest in 2023.Soil aggregates with different particle sizes were separated by the wet sieving method.The pro-portion(mass fraction),organic carbon content and total nitrogen content of aggregates in each particle size fraction were determined.The mean weight diameter(MWD),geometric mean diameter(GMD)and the proportion(mass fraction)of soil aggregates＞0.25 mm(R0.25)were calculated,and the storages of organic carbon and total nitrogen in aggregates of each particle size fraction were estimated.The results showed that compared with the NPK treatment:the RS treatment significantly(p＜0.05)reduced the proportion of aggregates with particle size ≤0.25 mm in the soil;the CM treatment significantly decreased soil bulk density and the proportion of aggregates with particle size≤0.25 mm,and significantly increased the proportion of aggregates with particle sizes of＞2.00 mm and＞0.25-1.00 mm,as well as the values of MWD,GMD and R0.25.Compared with the NPK treatment,the CM treatment sig-nificantly increased the organic carbon storage and its contribution rate of aggregates with particle sizes of＞2.00 mm by 66.91％and 11.23 percentage points,respectively,and significantly increased the total nitrogen storage of aggre-gates with particle sizes of＞2.00 mm by 43.89％.Correlation analysis indicated that the stability of soil aggregates was mainly affected by aggregates with particle sizes of＞2.00 mm and＞0.25-1.00 mm.Overall,both the CM and RS treatments contributed to improving the stability of soil aggregates and the storages of organic carbon and total nitrogen in soil aggregates,and the effect of the CM treatment was superior to that of the RS treatment.Therefore,the combined application of controlled-release BB fertilizer and decomposed cow manure can be adopted as an effec-tive measure to enhance the stability of soil aggregates and regulate the soil organic carbon pool and nitrogen pool in yellow clayey paddy soils in central Zhejiang.关键词
黄泥田/有机物料/有机碳/全氮/团聚体稳定性Key words
yellow clayey paddy soil/organic material/organic carbon/total nitrogen/aggregate stability分类
农业科技引用本文复制引用
石其伟,伍少福,陶娟花,吴良欢,马庆旭,刘秀,韩科峰..外源有机物料长期施用对黄泥田团聚体稳定性和有机碳氮积累的影响[J].浙江农业学报,2026,38(4):720-730,11.基金项目
浙江省"三农九方"科技协作计划(2025SNJF025) （2025SNJF025）
国家自然科学基金(32172674) （32172674）
农田智慧施肥项目(20221805) （20221805）
