Zeyu Zhang, Dongxing Xie, Wenhao Teng, Feng Gu, Rui Zhang, Kui Cheng, Zhuqing Liu, Ying Zhao, Fan Yang
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引用次数: 0
Abstract
Background and aims
Paddy nutrients play a significant role in maintaining ecological balance and ensuring food security. However, most current research on paddy nutrients focuses on nutrient transformation mechanisms or rice absorption mechanisms, with a lack of systematic analysis of the nutrient cycling process.
Methods
Therefore, this article first introduces the cycling process of key elements (carbon, nitrogen, phosphorus) in paddy soil.
Results
It was found that biochemical processes such as fixation, decomposition and mineralisation promote decomposition of organic matter and affect the efficiency of soil organic carbon accumulation. Mineralisation converts organic nitrogen to ammonium nitrogen (NH4+), and nitrification further converts ammonium nitrogen to nitrate nitrogen (NO3–), which is easily absorbed and utilised by plants and microorganisms, whereas denitrification, leaching, and runoff are the important pathways of nitrogen loss. The processes of adsorption, precipitation and immobilisation reduce the bioavailability of phosphorus, while desorption, solubilisation and mineralisation promote the uptake of phosphorus by rice. Secondly, the nutrient absorption mechanism of rice was reviewed. Leaves assimilate carbon dioxide and produce organic matter through photosynthesis, while the xylem and phloem of stems jointly undertake nutrient transport, and the root system absorbs nutrients such as nitrogen and phosphorus through the symplastic and extracellular pathways. Finally, based on the above research progress, future development trends in this field are proposed. Specifically, these include the impact of key micronutrients on nutrient cycling, the development of high precision sensor technologies, and a focus on cross-scale nutrient cycling research.
Conclusion
This study can provide theoretical reference for further research on the efficient utilization of nutrients in paddy fields.
期刊介绍：
Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.
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