红壤性水稻土有机无机复合体中碳氮特征对长期施肥的响应  

Response of Carbon and Nitrogen Distribution in Organo-Mineral Complexes of Red Paddy Soil to Long-Term Fertilization

作　　者：李浩 陈金[3] 王洪亮 柳开楼[4] 韩天富[1] 都江雪 申哲 刘立生[1,5] 黄晶[1,5] 张会民[1,5] LI Hao;CHEN Jin;WANG HongLiang􀀍;LIU KaiLou;HAN TianFu;DU JiangXue;SHEN Zhe;LIU LiSheng;HUANG Jing;ZHANG HuiMin(Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences/Key Laboratory of Arable Land Quality Monitoring and Evaluation,Ministry of Agriculture and Rural Affairs,Beijing 100081;School of Resources and Environment,Henan Institute of Science and Technology,Xinxiang 453003,Henan;Soil and Fertilizer&Resources and Environment Institute,Jiangxi Academy of Agricultural Sciences/Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River,Ministry of Agriculture and Rural Affairs/National Engineering and Technology Research Center for Red Soil Improvement,Nanchang 330200;Jiangxi Institute of Red Soil/National Engineering and Technology Research Center for Red Soil Improvement/Scientific Observational and Experimental Station of Arable Land Conservation in Jiangxi,Ministry of Agriculture and Rural Affairs,Nanchang 330046;Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences/Qiyang Farmland Ecosystem National Observation and Research Station,Qiyang 426182,Hunan)

机构地区：[1]中国农业科学院农业资源与农业区划研究所/农业农村部耕地质量监测与评价重点实验室,北京100081 [2]河南科技学院资源与环境学院,河南新乡453003 [3]江西省农业科学院土壤肥料与资源环境研究所/农业农村部长江中下游作物生理生态与耕作重点实验室/国家红壤改良工程技术研究中心,南昌330200 [4]江西省红壤研究所/国家红壤改良工程技术研究中心/农业农村部江西耕地保育科学观测实验站,南昌330046 [5]中国农业科学院农业资源与农业区划研究所/祁阳农田生态系统国家野外科学观测研究站,湖南祁阳426182

出　　处：《中国农业科学》2023年第7期1333-1343,共11页Scientia Agricultura Sinica

基　　金：国家自然科学基金(41671301);国家红壤改良工程技术研究中心开放基金(2020NETRCRSI-9);国家重点研发计划(2016YFD0300901)。

摘　　要：【目的】研究长期施肥对红壤性水稻土有机无机复合体中有机碳(OC)、全氮(TNOIC)特征的影响,为红壤性水稻土管理和培育土壤肥力提供依据。【方法】以长期定位施肥试验的红壤性水稻土为研究对象(始于1984年),选取CK(不施肥)、PK(施磷钾肥)、NPK(施氮磷钾肥)、NPKM(施70%氮磷钾肥+30%有机肥)4个处理。采集0—20 cm土层土样,分析各粒级(<2、2—10、10—20、20—50和50—250μm)有机无机复合体的分布,并探讨施肥对复合体中有机碳(OC)和全氮(TNOIC)含量、储量和碳氮比(C/N)的影响,以及有机无机复合体中OC和TNOIC对红壤性水稻土有机碳(SOC)、全氮(TN)贡献率的影响。【结果】与不施肥CK相比,施肥处理显著提高了20—50μm粒级复合体的比例,降低了<10μm粒级复合体比例,而NPKM处理与其他施肥处理相比,50—250μm粒级复合体的比例增加更显著;不同施肥对各粒级复合体中OC和TNOIC含量影响不同,与PK相比,NPK处理的50—250μm粒级复合体中OC和TNOIC分别增加了36.3%、80.6%;与NPK相比,NPKM处理的50—250μm粒级复合体中OC和TNOIC含量分别增加了35.4%、19.5%,OC和TNOIC主要分布在10—20μm粒级复合体中,施肥显著降低了<2μm粒级复合体OC和TNOIC储量,同时增加了20—50μm粒级复合体OC和TNOIC储量,与PK相比,NPK处理对<2和50—250μm粒级复合体OC储量分别增加了18.5%和31.2%,TNOIC储量分别增加了18.8%和73.7%,与NPK相比,NPKM处理对<2μm粒级复合体中OC和TNOIC储量分别降低了25.6%和27.4%,而50—250μm粒级复合体则分别提高了56.3%和38.6%;不同施肥处理显著影响50—250μm粒级复合体的C/N,与PK相比,NPK处理的50—250μm粒级复合体的C/N比降低了24.6%,与NPK相比,NPKM处理的50—250μm粒级复合体C/N比提高了13.4%;长期不同施肥显著影响各粒级有机无机复合体对土壤SOC、TN的贡献率,与PK相比,NPK处理50—250μm粒级复合体对SOC、TN贡献率分别提高了17.4%和47【Objective】The effects of long-term fertilization on the distribution of organic carbon(OC)and total nitrogen(TNOIC)of organo-mineral complexes in red paddy soil were studied,so as to provide a basis for long-term management and cultivation of soil fertility in red paddy soil.【Method】The red paddy soils in long-term fertilization experiment were studied(Since 1984),which included four treatments:no fertilization(CK),inorganic P and K fertilizers(PK),inorganic N,P and K fertilizers(NPK),and NPK plus manure(NPKM,70%NPK plus 30%manure).Soil samples of 0-20 cm soil layer were collected,and the distribution of organo-mineral complexes at each particle level(<2μm,2-10μm,10-20μm,20-50μm,and 50-250μm)was analyzed.The effects of fertilization on the content,storage of organic carbon and total nitrogen as well as the carbon-nitrogen ratio(C/N)were discussed.The effects of OC and TNOIC contents in organo-mineral complex on contribution rate of SOC and TN contents in red paddy soil were investigated too.【Result】Compared with the CK treatment,the fertilization treatment significantly increased the particle size ratio of 20-50μm and decreased the particle size ratio of<10μm.Compared with other fertilization treatments,NPKM treatment increased the proportion of 50-250μm grain size complex more significantly.Different fertilization treatments had different effects on the content of OC and TNOIC in grain size.Compared with PK,the content of OC and TNOIC in grain size from 50μm to 250μm under NPK treatment increased 36.3%and 80.6%,respectively.Compared with NPK,the content of OC and TNOIC in 50-250μm granular complex increased by 35.4%and 19.5%under NPKM treatment,respectively.The OC and TNOIC storage of the organic and inorganic complexes were mainly distributed at the 10-20μm particle level.And fertilization significantly reduced the storage of<2μm particle-level complex OC and TNOIC,but increased the storage of OC and TNOIC at 20-50μm particle-level.Compared with PK treatment,the OC storages of<2μm an

关 键 词：长期施肥 红壤性水稻土 有机无机复合体 有机碳 全氮 

分 类 号：S147[农业科学—肥料学]