旱作黑土中不同种类有机肥的残留效应及对土壤CO2排放的影响

doi:10.13287/j.1001-9332.202409.015

应用生态学报 ›› 2024, Vol. 35 ›› Issue (9): 2609-2619.doi: 10.13287/j.1001-9332.202409.015

旱作黑土中不同种类有机肥的残留效应及对土壤CO₂排放的影响

伍志阳^1,2, 陈增明¹, 刘玉莲¹, 陈艺周^1,2, 许士麒¹, 张久明³, 张永成⁴, 郭小俊¹, 丁维新^1,5*

¹中国科学院南京土壤研究所, 土壤与农业可持续发展国家重点实验室, 南京 210008;
²中国科学院大学, 北京 100049;
³黑龙江省黑土保护利用研究院/农业农村部黑土地保护与利用重点实验室, 哈尔滨 150086;
⁴双鸭山市气象局, 黑龙江双鸭山 155100;
⁵中国科学院大学南京学院, 南京 211135

收稿日期:2024-04-06 接受日期:2024-07-29 出版日期:2024-09-18 发布日期:2025-03-18
通讯作者: * E-mail: wxding@issas.ac.cn
作者简介:伍志阳, 男, 1995年生, 硕士研究生。主要从事黑土固碳减排的有机物料施用策略研究。E-mail: wuzhiyang@issas.ac.cn; wzy678@vip.qq.com
基金资助:
国家重点研发计划项目(2021YFD1500801)、中国科学院战略性先导科技专项(XDA28010302)和中国科学院南京土壤研究所“十四五”自主部署项目(ISSASIP2212)

Different organic composts application in dryland Mollisol:Residual effect and soil CO₂ emission

WU Zhi-yang^1,2, CHEN Zengming¹, LIU Yulian¹, CHEN Yizhou^1,2, XU Shiqi¹, ZHANG Jiuming³, ZHANG Yongcheng⁴, GUO Xiaojun¹, DING Weixin^1,5*

¹State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
²University of Chinese Academy of Sciences, Beijing 100049, China;
³Heilongjiang Academy of Black Soil Conservation and Utilization/Laboratory of Black Soil Protection and Utilization, Ministry of Agriculture and Rural Affairs, Harbin 150086, China;
⁴Bureau of Meteorology of Shuangyashan City, Shuangyashan 155100, Heilongjiang, China;
⁵University of Chinese Academy of Sciences, Nanjing 211135, China

Received:2024-04-06 Accepted:2024-07-29 Online:2024-09-18 Published:2025-03-18

摘要/Abstract

摘要： 施用有机肥对黑土肥力提升具有重要作用,但不同种类有机肥的固碳效果存在较大变异且内在机制尚不清楚。为探究不同有机肥的残留及其对土壤碳排放的影响,选取东北旱作黑土开展田间试验,设置仅施化肥对照(SNF)和施用牛粪(CRH)、羊粪(SHP)、鸡粪(CKN)、玉米淀粉渣(BCS)、秸秆(HRS)、菇渣(WMC)制成的有机肥,共7个处理。利用静态箱法监测全年土壤CO₂排放通量,同步测定环境因子和土壤活性碳、氮含量,并运用神经网络分析揭示有机组分特征对有机肥碳残留率的调控机制。结果表明: 与SNF处理相比,有机肥处理使土壤溶解性有机碳(DOC)含量增加26.3%～103.5%,可浸提有机氮含量提高21.4%～150.0%,但是明显降低了土壤DOC的芳香度。土壤异养呼吸通量主要受土壤温度和DOC含量影响,且其温度敏感性在CKN处理显著降低。施用有机肥使土壤异养呼吸年累积量由对照的203 g·C·m^-2增至234～334 g·C·m^-2,其中CKN和HRS处理最显著。黑土中不同有机肥处理周年碳残留率为CRH(91.2%)>WMC(82.9%)>BCS(82.6%)>SHP(78.1%)>CKN(70.2%)>HRS(69.3%),有机肥半纤维素含量和碳氮比是影响其碳残留率的关键因素,解释度分别为58.8%和32.9%。低碳氮比与低半纤维素、溶解性多酚含量使牛粪有机肥具有最高的碳残留率且不显著影响黑土异养呼吸。综上所述,施用牛粪有机肥更有助于实现旱作黑土有机碳的高效提升。

关键词: 有机肥, 黑土, 碳残留率, CO₂排放, 有机组分

Abstract: Organic compost application plays an important role in improving the fertility of Mollisol. However, the effects of different organic composts on carbon sequestration varies greatly and its internal mechanism are unclear. We conducted a field experiment to explore the residual proportion of different organic composts and their effects on carbon emissions in dryland Mollisol in Northeast China. There were a total of seven treatments, including chemical fertilizer control (SNF), organic composts from cattle excreta (CRH), sheep excreta (SHP), chicken excreta (CKN), residue after corn starch production (BCS), residue with crop straws (HRS) and mushroom residue (WMC). We monitored annual soil CO₂ flux by static chamber method, as well as the changes of environmental factors and soil dissolved carbon and nitrogen. The regulatory mechanism of organic component characteristics on carbon residual porprotion of organic composts were examined by neural network analysis. The results showed that compared with the SNF treatment, soil dissolved organic carbon (DOC) and extractable organic nitrogen increased by 26.3%-103.5% and 21.4%-150.0%, respectively. The aromaticity of soil DOC was significantly reduced. Heterotrophic respiration flux was mainly affected by soil temperature and DOC content, while its temperature sensitivity was significantly reduced in the CKN treatment. Annual accumulation of heterotrophic respiration increased from 203 g·C·m^-2 of the control to 234-334 g·C·m^-2 under treatments with organic composts applications, with the CKN and HRS treatments showing the strongest impact. The annual carbon residual proportion of different organic composts in Mollisol was in an order of CRH (91.2%)> WMC (82.9%)> BCS (82.6%)> SHP (78.1%)> CKN (70.2%)> HRS (69.3%). Hemicellulose content and C/N of organic composts were the key factors, which explained 58.8% and 32.9% of the total variations of carbon residual proportion. Organic compost from cattle excreta had higher residual proportion due to lower C/N, hemicellulose content and soluble polyphenol content, and thus did not significantly affect Mollisol heterotrophic respiration. Therefore, the application of organic compost from cattle excreta was more efficient to improve organic carbon in dryland Mollisol.

Key words: organic compost, Mollisol, carbon residual proportion, CO₂ emission, organic component

伍志阳, 陈增明, 刘玉莲, 陈艺周, 许士麒, 张久明, 张永成, 郭小俊, 丁维新. 旱作黑土中不同种类有机肥的残留效应及对土壤CO₂排放的影响[J]. 应用生态学报, 2024, 35(9): 2609-2619.

WU Zhi-yang, CHEN Zengming, LIU Yulian, CHEN Yizhou, XU Shiqi, ZHANG Jiuming, ZHANG Yongcheng, GUO Xiaojun, DING Weixin. Different organic composts application in dryland Mollisol:Residual effect and soil CO₂ emission[J]. Chinese Journal of Applied Ecology, 2024, 35(9): 2609-2619.

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旱作黑土中不同种类有机肥的残留效应及对土壤CO₂排放的影响

Different organic composts application in dryland Mollisol:Residual effect and soil CO₂ emission

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