外源腐殖质材料添加对土壤有机质组分与水稻产量的影响

Effects of Adding Exogenous Humus Material on Soil Organic Matter Components and Crop Yield

    摘要
  • 摘要:
    目的 本研究探讨外源腐殖质材料添加对新垦耕地地力的影响，以期为耕地质量与产能快速提升提供技术支撑。
    方法 以新垦耕地为研究对象，采用田间小区试验的方法，设置单施化肥（CK，对照），单施有机肥（OM），单施天然腐殖质材料（MO1）、单施生物激发剂（MO2），有机肥、天然腐殖质、生物激发剂三种施用比例5﹕5﹕1（MT1）、5﹕10﹕1（MT2）、5﹕15﹕1（MT3）共7种处理，对比分析处理试验后首季作物成熟期水稻产量、土壤有机质及其组分变化，研究不同处理对土壤有机质组分与作物产量影响的耦合关系。
    结果 OM、MO1、MO2处理土壤有机质增幅分别为1.48、1.85、0.78g kg−1，MT1、MT2、MT3处理土壤有机质增幅较大（分别增加1.93、3.37、3.00 g kg−1）。土壤有机质增加的土体成分为难氧化的惰性有机质，占土壤有机质总量的51.72% ~ 71.01%。不同类型外源有机物料添加均能显著提升土壤碳库CPI指数（P < 0.05），有机肥与天然腐殖质配施处理显著提升了土壤微生物量碳含量但降低了可溶性有机碳含量，路径分析结果显示不同处理条件下水稻产量除受土壤有机质与可溶性有机碳直接影响外，还受难氧化的惰性有机质组分的间接影响。
    结论 天然腐殖质材料组合有机肥、生物激发剂添加处理能够快速提升土壤有机质含量，其地力提升效果明显高于单施有机肥或生物激发剂处理，并能够维持土壤本底有机碳库变化的稳定性，即“相似增效”作用，可作为短期内快速提升新垦农田土壤地力的有效手段之一。

     

    Abstract:
    Objective This study investigated the effects of exogenous humic material application on soil fertility in newly reclaimed cropland, aiming to provide technical support for the rapid improvement of cropland quality and productivity enhancement.
    Method Newly cultivated land was used as the research area and the method of a field positioning experiment was adopted in the study, including single application of chemical fertilizer control (CK), organic fertilizer (OM), natural humus material (MO1), biological activator (MO2), and combined application of organic fertilizer, natural humus, biological activator materials with gradient amounts ( MT1, MT2, MT3).
    Result The contents of soil organic matter in OM, MO1, and MO2 treatments were increased by 1.48, 1.85, and 0.78 g kg−1, respectively. And MT1, MT2, and MT3 treatments have shown the relative higher increase in organic matter contents (by 1.93, 3.37, and 3.00 g kg−1, respectively). The increment in soil organic matter predominantly consists of oxidation-resistant recalcitrant organic fractions, accounting for 51.72% - 71.01% of the total soil organic matter pool. The addition of different types of exogenous organic materials could also significantly increase the CPI index of soil carbon pool. The combined application of organic manure and natural humus material increased soil microbial biomass carbon content but decreased dissolved carbon content, significantly. Path analysis results proved that rice yield under different treatments conditions was not only affected by soil organic matter and dissolved organic carbon contents directly, but also affected by stable organic matter component indirectly.
    Conclusion This combined application of natural humic substances with organic manure and bio-stimulants have shown significantly superior soil fertility enhancement compared to singular applications of organic fertilizers or bio-stimulants, while maintaining the stability of native soil organic carbon pool dynamics. That is "similarity enhancement effect"), which can be used as an effective strategy for rapid soil productivity restoration in newly reclaimed farmlands within short-term cultivation practices.

     

    • HTML全文
    • 参考文献(24)
    • 相关文章
    • 施引文献
  • 资源附件(0)

/

返回文章
返回