[1]刘蓉,陈春兰,傅心赣,等.秸秆还田替代部分化肥对红壤稻田土壤活性有机碳、有机氮含量及相关酶活性的影响[J].江苏农业学报,2025,(10):1954-1961.[doi:doi:10.3969/j.issn.1000-4440.2025.10.009]
　LIU Rong,CHEN Chunlan,FU Xingan,et al.Effects of straw incorporation as a partial substitute for chemical fertilizers on labile organic carbon, organic nitrogen content, and relevant enzyme activities in red paddy soils[J].,2025,(10):1954-1961.[doi:doi:10.3969/j.issn.1000-4440.2025.10.009]
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秸秆还田替代部分化肥对红壤稻田土壤活性有机碳、有机氮含量及相关酶活性的影响()

江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2025年10期
页码:
1954-1961
栏目:
耕作栽培·资源环境
出版日期:
2025-10-31

文章信息/Info

Title:
Effects of straw incorporation as a partial substitute for chemical fertilizers on labile organic carbon, organic nitrogen content, and relevant enzyme activities in red paddy soils
作者:
刘蓉1; 2; 陈春兰1; 3; 傅心赣1; 3; 秦红灵1; 3; 方成1; 3
(1.中国科学院亚热带农业生态研究所,湖南长沙410125；2.华南农业大学资源环境学院,广东广州510642；3.中国科学院桃源农业生态试验站,湖南常德415700)
Author(s):
LIU Rong1; 2; CHEN Chunlan1; 3; FU Xingan1; 3; QIN Hongling1; 3; FANG Cheng1; 3
(1.Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;2.The College of Natural Resources and Environment,South China Agricultural University,Guangzhou 510642, China;3.Taoyuan Agro-Ecology Research Station, Chinese Academy of Sciences, Changde 415700, China)
关键词:
化肥减施; 秸秆还田; 可溶性有机碳; 可溶性有机氮; 微生物生物量碳; 微生物生物量氮; 土壤酶活性
Keywords:
fertilizer reduction; straw incorporation; soluble organic carbon; soluble organic nitrogen; microbial biomass carbon; microbial biomass nitrogen; soil enzyme activities
分类号:
S154；S158
DOI:
doi:10.3969/j.issn.1000-4440.2025.10.009
文献标志码:
A
摘要:
红壤稻田长期施用高量化肥,导致微生物活性受到抑制,碳氮循环失衡,影响土壤健康和稻田生产力。本研究基于连续17年的长期定位田间试验结果,探讨化肥减施配合秸秆还田对土壤活性有机碳、有机氮含量及相关酶活性的影响,以优化红壤稻田的可持续施肥策略。本研究设置3个处理:不施肥(CK)、施用高量氮磷钾化肥处理(NPK)和减量施用化肥+秸秆还田处理(OF)。结果表明,与CK和NPK处理相比,OF处理显著提高红壤稻田土壤微生物生物量碳、可溶性有机氮含量和微生物生物量氮含量(P＜0.05)。土壤β-葡萄糖苷酶(BG)和N-乙酰-β-D-氨基葡萄糖苷酶(NAG)活性的总体趋势均表现为OF处理＞NPK处理＞CK。土壤微生物生物量碳、微生物生物量氮、可溶性有机氮含量与BG活性、NAG活性之间均呈现显著或极显著正相关。综上,连续17年实施化肥减施并配合秸秆还田,可整体提升红壤稻田土壤活性有机碳和有机氮的含量,增强BG和NAG的活性,进而提高土壤肥力与质量。减量施用化肥+秸秆还田是提升红壤稻田土壤质量的较优施肥管理方案,并通过优化氮磷钾肥配施,间接促进了农业生态环境的改善。
Abstract:
Long-term application of large amounts of chemical fertilizers in red paddy soils inhibits microbial activity, disrupts carbon and nitrogen cycling, and ultimately compromises soil health and paddy field productivity. To optimize the sustainable fertilization strategies for red paddy soils, this study explored the effects of chemical fertilizer reduction combined with straw returning on soil labile organic carbon, organic nitrogen content, and relevant enzyme activities based on the long-term field experiment for 17 consecutive years. We set up three treatments: no fertilizer (CK), high-rate nitrogen, phosphorus and potassium fertilizer (NPK) and reduced chemical fertilizer combined with straw incorporation (OF). The results showed that compared with CK and NPK treatment, OF treatment significantly increased the content of microbial biomass carbon, soluble organic nitrogen and microbial biomass nitrogen in red paddy soils (P<0.05). The overall trend of soil β-glucosidase (BG) and N-acetyl-β-D-glucosaminidase (NAG) activities was OF treatment＞NPK treatment＞CK. Soil microbial biomass carbon, microbial biomass nitrogen, and soluble organic nitrogen (SON) content all exhibited significant or highly significant positive correlations with BG and NAG activities. Based on the above findings, the 17-year continuous practice of reducing chemical fertilizer combined with straw incorporation comprehensively enhanced soil labile organic carbon and organic nitrogen content, increased BG and NAG activities, and thereby improved soil fertility and quality in red paddy soils. Reduced chemical fertilizer application combined with straw incorporation is a superior management strategy for enhancing soil quality in red paddy soils, which also indirectly improves the agricultural ecological enviroment through optimized nitrogen, phosphorus and potassium fertilizer formulation.

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备注/Memo

备注/Memo:
收稿日期：2025-02-12基金项目：科技基础资源调查专项(2021FY100504)；国家生态系统观测研究网络(CNERN)湖南桃源农田生态系统国家野外科学观测研究站运行服务项目；中国生态系统研究网络(CERN)桃源农业生态试验站运行项目作者简介：刘蓉(2002-),女,湖北咸宁人,硕士研究生,主要从事稻田综合种养技术研究。(E-mail)lr020109@stu.scau.edu.cn通讯作者：方成,(E-mail)fangcheng@isa.ac.cn
更新日期/Last Update: 2025-11-17