摘要
【目的】研究不同施肥措施对水稻土有机碳及物理、化学组分的影响,为改善土壤结构,维持土壤地力提供依据。【方法】以红黏土发育的水稻土为研究对象,通过秸秆、紫云英还田,分析土壤有机碳物理、化学组分质量及含量分布变化。【结果】与单施化肥(F)相比,处理秸秆+化肥(SF)、紫云英+化肥(MF)和秸秆+紫云英+化肥(MSF)土壤有机碳增幅为28.79%~41.23%(P<0.05),且处理MSF显著高于处理SF和MF;大团聚体(Ma)质量占比提高16%~20%(P<0.05),有机碳含量增加60.32%~93.45%(P<0.05);微团聚体(Mi)质量占比减低6%~7%(P<0.05),而有机碳含量无显著变化;粘粉粒(s+c)质量占比下降10%~13%(P<0.05),而有机碳含量上升10.97%~25.38%(P<0.05)。大团聚体中粗颗粒态有机质(M-cPOM)质量占比提高7.36%~8.83%(P<0.05),有机碳含量增加28.39%~48.18%(P<0.05);大团聚体中微团聚体(M-Mi)质量占比显著上升32.48%~43.97%(P<0.05),同时有机碳含量增加43.14%~74.06%(P<0.05);大团聚体中粘粉粒(M-s+c)质量占比无显著变化,有机碳含量提高22.10%~42.75%(P<0.05)。重组粘粉粒(HL-s+c)质量占比降幅为5.31%~9.61%(P<0.05),有机碳含量增幅为16.43%~24.16%(P<0.05);重组沙粒(HL-sand)质量占比上升10.53%~20.13%(P<0.05),有机碳含量提高66.83%~105.74%(P<0.05)。惰性碳库(RP-C)、活性碳库1(LP1-C)、活性碳库2(LP2-C)有机碳含量增幅分别为21.89%~33.42%(P<0.05)、44.12%~71.43%(P<0.05)、15.65%~21.77%(P<0.05)。【结论】施加秸秆、紫云英能显著影响土壤有机碳含量及其物理、化学组分质量与含量分布。
[Objective]To study the effects of different fertilization measures on the organic carbon and its physical and chemical components of paddy soil so as to provide a basis for improving soil structure and maintaining soil fertility.[Method]Taking the paddy soil developed from red clay as the research object,returning straw and milk vetch to the field to analyze the changes in the quality and content distribution of the physical and chemical components of soil organic carbon.[Results]Compared with chemical fertilizer(F)only,the increase in soil organic carbon in the treatments of straw+chemical fertilizer(SF),milk vetch+chemical fertilizer(MF)and straw+milk vetch+chemical fertilizer(MSF)was 28.79%-41.23%(P<0.05),there were significant differences among MSF,SF and MF;the mass proportion of large aggregates(Ma)increased by 16%-20%(P<0.05),and the organic carbon content increased by 60.32%-93.45%(P<0.05);the mass proportion of micro-aggregates(Mi)decreased by 6%-7%(P<0.05)without significant change in organic carbon content;the mass proportion of sticky powder particles(s+c)decreased by 10%-13%(P<0.05),while the organic carbon content increased by 10.97%-25.38%(P<0.05).The mass proportion of coarse particulate organic matter(McPOM)in large aggregates increased by 7.36%-8.83%(P<0.05),and the organic carbon content increased by 28.39%~48.18%(P<0.05);the mass proportion of micro aggregates in large aggregates(M-Mi)increased significantly by 32.48%-43.97%(P<0.05),while the organic carbon content increased by 43.14%-74.06%(P<0.05);there was no significant change in the mass proportion of sticky powder particles in large aggregates(Ms+c),and the organic carbon content increased by 22.10%-42.75%(P<0.05).The weight percentage of recombined sticky powder(HL-s+c)decreased to 5.31%-9.61%(P<0.05),and the increase in organic carbon content was 16.43%-24.16%(P<0.05);the mass proportion of reorganized sand(HL-sand)increased by 10.53%-20.13%(P<0.05),and the organic carbon content increased by 66.83%-105.74%(P<0.05).The increases in or
作者
范钊
高绘文
吴建富
魏宗强
颜晓
FAN Zhao;GAO Huiwen;WU Jianfu;WEI Zongqiang;YAN Xiao(College of Land Resources and Environmental,Key Laboratory of Poyang Lake Basin Agricultural Resource and Ecology of Jiangxi Province,Jiangxi Agricultural University,Nanchang,Jiangxi 330045,China)
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2021年第1期214-222,共9页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(31660596)
国家重点研发计划项目(2017YFD0301601)。
关键词
红壤性水稻土
紫云英
秸秆
有机碳组分
Red paddy soil
milk vetch
straw
organic carbon component
