ArticlePeerJ2025
Exploration of nitrogen use efficiency and root-shoot-soil variation on the stoichiometric characteristics of carbon, nitrogen, phosphorous and potassium for winter wheat under various nitrogen treatments.
Article in PeerJ, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Nitrogen (N) addition has significant effects on grain yield and nutrient use efficiency (NUE) in farmland ecosystems, and the total carbon: nitrogen: phosphorus: potassium (TC:TN:TP:TK) stoichiometry in plants and soil is of great significance for improving plant productivity and nutrition. However, there is still uncertainty regarding the effects of N fertilizers on the stoichiometric characteristics of different root-shoot parts of winter wheat during growth progression. Methods: 'Fengdecunmai5' wheat was selected as the material for the positioning test field. Three N application treatments (0, 180 and 300 kg ha Results: The N180 treatment increased the total nitrogen (TN) content in roots, stems plus leaves and grain at each stage. The TN and TP content in stems plus leaves gradually decreased from jointing to maturity stages, whereas the TN content in grain gradually increased from filling to maturity stages. Under the N180 treatment, TN:TP values significantly increased, by 20.3%, 27.9% and 26.3% compared with N0 treatment, respectively. Moreover, the farmland ecosystem was mainly limited by the TN content. TK content in roots and TC:TN in stems plus leaves was significantly positively correlated with NUE. TN:TK and TN: TP in stems plus leaves were positively correlated with yield, and TN and TK content in stems plus leaves considerably influenced the yield. Conclusions: Under N180 treatment, compared with N0 and N300 treatments, wheat plants achieved higher nutrient uptake, and greater yield and NUE. This study contributes to the assessment of plant productivity and the precise optimization of ecosystem stoichiometry in the context of green sustainable agricultural development.
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