最新录用：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

doi:10.3864/j.issn.0578-1752.220173

中国农业科学

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最新录用：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

李浩^1,2，陈金³，王洪亮²，柳开楼⁴，韩天富¹，都江雪¹，申哲¹，刘立生^1,5，黄晶^1,5，张会民^1,5

¹中国农业科学院农业资源与农业区划研究所/耕地保护国家工程研究中心，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中国农业科学院祁阳农田生态系统国家野外试验站，湖南祁阳 426182

发布日期:2022-06-22

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

LI Hao^1,2, CHEN Jin³, WANG HongLiang², LIU KaiLou⁴, HAN TianFu¹, DU JiangXue¹, SHEN Zhe¹, LIU LiSheng^1,5, HUANG Jing^1,5, ZHANG HuiMin^1,5 #br#

¹Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences/National Engineering Research Center of Arable Land Protection, Beijing 100081; ²School of Resources and Environment, Henan Institute of Science and Technology, Xinxiang 453003, Henan; ³Soil 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; ⁴Jiangxi 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; ⁵National Observation Station of Qiyang Agri-Ecology System, Institute of Agricultural Resources and Regional Planning, CAAS, Qiyang 426182, Hunan

Online:2022-06-22

摘要/Abstract

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（TN_OIC）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—250 μm）有机无机复合体的分布，并探讨施肥对复合体中OC和TN_OIC的含量、储量和碳氮比（C/N）的影响，以及有机无机复合体中OC和TN_OIC对红壤性水稻土土壤有机碳（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—50 μm粒级复合体的比例，降低了<10 μm粒级复合体比例，而NPKM处理与其他施肥处理相比，50—250 μm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TN_OIC含量影响不同，与PK相比，NPK处理的50—250 μm粒级复合体中OC和TN_OIC分别增加了36.3%、80.6%；与NPK相比，NPKM处理的50—250 μm粒级复合体中有机碳和全氮含量分别增加了35.4%、19.5%；OC和TN_OIC主要分布在10—20 μm粒级复合体中，施肥显著降低了<2 μm粒级复合体OC和TN_OIC储量，同时增加了20—50 μm粒级复合体OC和TN_OIC储量，与PK相比，NPK处理对<2和50—250 μm粒级复合体OC储量分别增加了18.5%和31.2%，TN_OIC储量分别增加了18.8%和73.7%，与NPK相比，NPKM处理对<2 μm粒级复合体中OC和TN_OIC储量分别降低了25.6%和27.4%，而50—250 μm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—250 μm粒级复合体的C/N，与PK相比，NPK处理的50—250 μm粒级复合体的C/N比降低了24.6%，与NPK相比，NPKM处理的50—250 μm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—250 μm粒级复合体对SOC、TN贡献率分别提高了17.4%和47.4%。与NPK相比，NPKM处理50—250 μm粒级复合体对SOC、TN贡献率分别提高了39.5%和32.8%。【结论】在红壤性水稻土中，长期施肥促使大粒级有机无机复合体形成；化肥中的氮投入显著提高50—250 μm粒级复合体中有机碳、全氮含量和储量；有机无机配施有利于提高土壤有机碳含量，提高大粒级有机无机复合体比例，有助于保存施入的无机氮肥，是红壤性水稻土长期培肥管理的有效措施。

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

Abstract: 【Objective】The effects of long-term fertilization on the distribution of organic carbon (OC) and total nitrogen (TN_OIC) of organo-mineral complexes in red paddy soil were studied, which provided 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 include 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 were collected and the distribution of organo-mineral complexes at each particle level (<2 μm, 2-10 μm, 10-20 μm, 20-50 μm, 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. And the effects of SOC and TN contents in organo-mineral complex on contribution rate of SOC and TN contents in red paddy soil.【Result】Compared with the CK treatment, 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 had different effects on the content of OC and TN_OIC in grain size. Compared with PK, the content of OC and TN_OIC 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 TN_OIC in 50-250 μm granular complex increased by 35.4% and 19.5% in NPKM treatment, respectively. The SOC and TN_OIC 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 TN_OIC, but increased the storage of OC and TN_OIC 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 TN_OIC increased by 18.8% and 73.7%, respectively. Compared with NPK, the NPKM treatment reduced the SOC and TN storages of the <2 μm particle-level complex by 25.6% and 27.4%, respectively, while OC and TN_OIC 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% and 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 soil 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%.【Conclusion】In red soil paddy soil, 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 is conducive to increasing the soil organic carbon content and the proportion of large-grain organo-mineral complexes, which is helping to preserve the inorganic nitrogen fertilizer applied. Therefore, organic and inorganic compound application is an effective measure for long-term fertilization management of red paddy soils.

Key words: long-term fertilization, red paddy soil, organo-mineral complex, organic carbon, total nitrogen

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, . 最新录用：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, 0, (): 1-.

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, 0, (): 1-.

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最新录用：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

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