| 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 |
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| 引用本文： | 李浩,陈金,王洪亮,柳开楼,韩天富,都江雪,申哲,刘立生,黄晶,张会民.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[J].中国农业科学,2023,56(7):1333-1343. |
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| 作者姓名： | 李浩 陈金 王洪亮 柳开楼 韩天富 都江雪 申哲 刘立生 黄晶 张会民 |
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| 作者单位： | 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;2. 河南科技学院资源与环境学院;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;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;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 |
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| 基金项目： | 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) |
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| 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...
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| 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 |
| 收稿时间： | 2022-02-27 |
Response of Carbon and Nitrogen Distribution in Organo-Mineral Complexes of Red Paddy Soil to Long-Term Fertilization |
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| LI Hao,CHEN Jin,WANG HongLiang,LIU KaiLou,HAN TianFu,DU JiangXue,SHEN Zhe,LIU LiSheng,HUANG Jing,ZHANG HuiMin.Response of Carbon and Nitrogen Distribution in Organo-Mineral Complexes of Red Paddy Soil to Long-Term Fertilization[J].Scientia Agricultura Sinica,2023,56(7):1333-1343. |
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| Authors: | LI Hao CHEN Jin WANG HongLiang LIU KaiLou HAN TianFu DU JiangXue SHEN Zhe LIU LiSheng HUANG Jing ZHANG HuiMin |
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| Abstract: | 【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 (<2 μm, 2-10 μm, 10-20 μm, 20-50 μm, and 50-250 μm) 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 20-50 μm and decreased the particle size ratio of <10 μm. Compared with other fertilization treatments, NPKM treatment increased the proportion of 50-250 μm 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 50 μm to 250 μm under NPK treatment increased 36.3% and 80.6%, respectively. Compared with NPK, the content of OC and TNOIC in 50-250 μm 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 10-20 μm particle level. And fertilization significantly reduced the storage of <2 μm particle-level complex OC and TNOIC, but increased the storage of OC and TNOIC at 20-50 μm particle-level. Compared with PK treatment, the OC storages of <2 μm and 50-250 μm particle-level complexes treated by NPK increased by 18.5% and 31.2%, respectively, and the storages of TNOIC increased by 18.8% and 73.7%, respectively. Compared with NPK, the NPKM treatment reduced the OC and TNOIC storages of the <2 μm particle-level complex by 25.6% and 27.4%, respectively, while OC and TNOIC storages of 50-250 μm particle-level complex increased by 56.3% and 38.6%, respectively. Fertilization significantly influenced the C/N ratio of 50-250 μm particles. Compared with PK, the C/N ratio of 50-250 μm fraction treated with NPK decreased by 24.6%; compared with NPK, the C/N ratio of 50-250 μm fraction treated with NPKM was increased by 13.4%. Fertilization significantly affected the contribution rate of organo-mineral complexes of each particle size to SOC and TN content. Compared with PK, the contribution rate of NPK treatment 50-250 μm particle-level complex to SOC and TN increased by 17.4% and 47.4%, respectively. Compared with NPK, the contribution rate of NPKM treatment 50-250 μm particle to SOC and TN were reduced by 39.5% and 32.8%, respectively.【Conclusion】 In red paddy soil, the long-term fertilization promoted the formation of large-grain organo-mineral complexes. The nitrogen input in the chemical fertilizers significantly increased the grain-level organic carbon, total nitrogen content and storage of the granular grade of 50-250 μm. The organo-mineral combined application was conducive to increasing the soil organic carbon content and the proportion of large-grain organo-mineral complexes, which was helping to preserve the inorganic nitrogen fertilizer application. Therefore, organic and inorganic compound application was an effective measure for long-term fertilization management of red paddy soils. |
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| Keywords: | long-term fertilization red paddy soil organo-mineral complex organic carbon total nitrogen |
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