中国农业科学 ›› 2025, Vol. 58 ›› Issue (23): 4952-4966.doi: 10.3864/j.issn.0578-1752.2025.23.011

• 土壤肥料·节水灌溉·农业生态环境 • 上一篇    下一篇

有机无机肥配施调控红壤稻田土壤肥力、生态化学计量特征及产量

陈均权1(), 马驰远2, 胡鑫1, 李朵1, 郭艳琦1, 刘灿1, 周凯1, 郑太辉1,*()   

  1. 1 江西农业大学国土资源与环境学院/农业农村部鄱阳湖流域农业资源与生态重点实验室,南昌 330045
    2 南昌海关技术中心,南昌 330038
  • 收稿日期:2024-11-05 接受日期:2024-12-30 出版日期:2025-12-01 发布日期:2025-12-09
  • 通信作者:
    郑太辉,E-mail:
  • 联系方式: 陈均权,E-mail:jqchengd@163.com。
  • 基金资助:
    国家自然科学基金(42167047); 赣鄱俊才经费-高校领军青年项目(QN2023017); 2022年度井冈山农高区省级科技专项“揭榜挂帅子课题(20222-051261-2-4); 江西省农业关键核心技术攻关子课题(JXNK202307-01-02)

Effects of Incorporation of Inorganic-Organic Fertilizers on Soil Fertility, Ecological Stoichiometric Characteristics, and Yields of Rice Cropping System in the Red Soil Region of China

CHEN JunQuan1(), MA ChiYuan2, HU Xin1, LI Duo1, GUO YanQi1, LIU Can1, ZHOU Kai1, ZHENG TaiHui1,*()   

  1. 1 College of Land Resources and Environment, Jiangxi Agricultural University/Key Laboratory of Agricultural Resources and Ecology in Poyang Lake Watershed, Ministry of Agriculture and Rural Affairs, Nanchang 330045
    2 Technology Center of Nanchang Customs District, Nanchang 330038
  • Received:2024-11-05 Accepted:2024-12-30 Published:2025-12-01 Online:2025-12-09

摘要:

【目的】 分析有机肥与化肥不同配比施用对土壤肥力和水稻产量的影响,旨在为红壤稻田土壤改良及可持续管理提供科学指导。【方法】 采用田间定位试验,于 2021—2023 年,在江西省上高县的绿色种养循环农业示范区内实施。试验设置 7 个处理:不施肥(CK),常规单施化肥(CF),化肥优化施用(COF),腐熟猪粪替代 15%、30% 化学氮肥(OFN15、OFN30)和替代 30%、60% 化学磷肥(OFP30、OFP60)。通过系统分析,评估各处理对土壤pH、碳组分含量、氮磷钾养分状况、生态化学计量特征、土壤综合肥力及水稻产量的影响。【结果】 与 CF 相比,采用有机肥部分替代化肥的处理显著提高了土壤的速效钾含量,增幅达10.8%—34.2%;同时土壤pH也有所提高,增加了 0.19—0.30 个单位,有机碳含量增加了1.7%—11.6%。不同比例有机肥替代对土壤养分的提高效果差异显著,其中OFN30处理在增加土壤氮、磷、钾和碳含量方面表现最为突出。相对于CF处理,OFN15 和 OFP60 处理的水稻产量显著下降了7.3% 和 10.6%,而 OFN30 和 OFP30 处理的水稻产量则没有显著差异。利用内梅罗指数法对7个处理进行了综合肥力评价,得出的内梅罗指数(IFI)从高到低依次为OFN15(1.407)、OFN30(1.391)、OFP60(1.379)、OFP30(1.356)、COF(1.354)、CF(1.341)和 CK(1.309)。尽管无机肥的施用对水稻产量的直接影响更为显著,但偏最小二乘结构方程模型(PLS-SEM)的分析显示,在改善土壤化学性质方面,有机肥的效果优于无机肥,并且对提高水稻产量产生了显著的正效应。特别是,以有机肥替代化学氮肥,显著提高了稻田土壤的全氮、有机碳和有效氮的含量。【结论】 施用有机肥对于提高红壤稻田土壤的碳、氮、磷、钾生态化学计量学特征及其综合肥力具有显著的正向影响。将有机肥替代化学氮肥的比例控制在30%左右(基于氮含量计算),可以在短期内达到土壤肥力与水稻产量的最佳平衡状态。

关键词: 有机肥替代, 红壤, 水稻, 生态化学计量特征, 产量, 综合肥力评价

Abstract:

【Objective】 Long-term reliance on chemical fertilizers in red soil paddy fields has caused a decline in soil fertility and nutrient imbalances, leading to unstable rice yields. This study evaluated the effects of combining organic fertilizers and chemical fertilizers at different ratios on soil fertility and rice yields. The findings aim to provide scientific guidance for improving soil quality and promoting sustainable management of red soil paddy fields. 【Method】 A field experiment was conducted in the Green Breeding and Recycling Agricultural Demonstration Area, Shanggao County, Jiangxi Province, from 2021 to 2023. Seven treatments were implemented: no fertilization (CK), conventional chemical fertilizers alone (CF), optimized chemical fertilizers (COF), and partial replacement of chemical nitrogen fertilizers with 15% or 30% fermented pig manure organic fertilizers (OFN15, OFN30), and replacement with 30% or 60% of chemical phosphorus fertilizers with organic fertilizers (OFP30, OFP60). The study systematically analyzed the effects of these treatments on soil pH, carbon content, nitrogen, phosphorus, potassium nutrient levels, ecological stoichiometric characteristics, comprehensive soil fertility and rice yields. 【Result】 Treatments involving partial replacement of chemical fertilizers with organic fertilizers significantly increased the available potassium content in the soil by 10.8%-34.2% compared to CF treatments. Soil pH also increased by 0.19-0.30 units, while organic carbon content rose by 1.7%-11.6%. The effects of different organic fertilizer replacement proportions on soil nutrient improvement varied significantly, indicating the importance of determining the optimal proportion for soil enhancement. Among these treatments, the OFN30 treatment showed the greatest enhancement in soil nitrogen, phosphorus, potassium, and carbon content. Compared to CF, the OFN15 and OFP60 treatments reduced rice yields by 7.3% and 10.6%, respectively, while the OFN30 and OFP30 treatments showed no significant yield differences. A comprehensive soil fertility evaluation using the Nemero index (IFI) method ranked the seven soil treatments from highest to lowest as follows: OFN15 (1.407), OFN30 (1.391), OFP60 (1.379), OFP30 (1.356), COF (1.354), CF (1.341) and CK (1.309). While inorganic fertilizers had a more significant impact on rice yields, analysis using the partial least squares structural equation model (PLS-SEM) revealed that organic fertilizers were more effective in improving soil chemical properties. Furthermore, organic fertilizers had a significant positive impact on rice yield. Specifically, replacing chemical nitrogen fertilizers with organic fertilizers notably increased the levels of total nitrogen, organic carbon, and available nitrogen in paddy soil. 【Conclusion】 Based on a comprehensive evaluation of rice yields and improvements in soil physical and chemical properties, this study found that the application of organic fertilizers significantly enhanced the ecological stoichiometric characteristics of carbon, nitrogen, phosphorus, and potassium, as well as the overall fertility of red soil paddy fields under the experimental conditions. By maintaining the replacement ratio of organic fertilizers to chemical nitrogen fertilizers at about 30% (calculated based on nitrogen contents), an optimal balance between soil fertility and rice yield can be achieved in the short term. These findings provide important scientific evidence and practical guidance for the sustainable management and fertility improvement of red soil paddy fields.

Key words: organic fertilizer replacement, red soil, rice, ecological stoichiometric characteristics, yield, comprehensive fertility assessment