磷肥施用对土壤呼吸及其组分影响的研究进展

    Research Progress on the Effects of Phosphorus Fertilizer Application on Soil Respiration and Its Components

    • 摘要: 土壤磷肥大量输入,增加土壤磷有效性,将显著影响陆地生态系统碳循环过程。土壤呼吸作为碳循环过程中的关键组分在全球碳平衡和气候变暖中扮演重要的角色,其对磷肥响应模式及机制是当前生态学研究领域的热点问题。综述了土壤呼吸及其组分对磷肥的响应,发现磷肥对土壤呼吸及其组分的影响表现为增加、降低和无影响,且因生态系统类型、施磷量、施磷时长不同而不同。磷肥主要通过改变土壤pH、可溶性有机碳、植物生产力、凋落物、微生物群落组成等影响土壤呼吸的环境因子,直接或间接影响土壤呼吸及其组分。未来应重点关注施磷对土壤呼吸组分的影响及微生物学作用机制,同时开展土壤呼吸组分对磷肥介导的多种环境因子变化的响应研究,为全面认识磷肥对全球碳平衡的调控提供理论参考。

       

      Abstract: A large amount of soil phosphorus input will increase the availability of soil phosphorus, which will significantly affect the carbon cycle process of terrestrial ecosystem. As a key component of carbon cycle, soil respiration plays an important role in the global carbon balance and climate warming. The response mode and mechanism of soil respiration to phosphorus fertilizer is a hot issue in the current ecological research field. In this paper, the response of soil respiration and its components to phosphorus fertilizer was reviewed. It was found that the effects of phosphorus fertilizer on soil respiration and its components were increased, decreased, and no effect, and varied depending on the types of ecosystem, the application amount of phosphorus, and the duration of phosphorus application. The phosphorus fertilizer mainly affected the soil respiration and its components directly or indirectly by changing the environmental factors such as soil pH, soluble organic carbon, plant productivity, litter, and microbial community composition. In the future, we should focus on the effects of phosphorus application on the soil respiration components and the microbiological mechanism. At the same time, the response of soil respiration components to the changes of various environmental factors mediated by phosphorus fertilizer should be studied, so as to provide theoretical reference for comprehensively understanding the regulation of phosphorus fertilizer on the global carbon balance.

       

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