Carciochi W.D., J.L. Ferrari, L. Orden, J.A. Galantini. 2024. Pelletized organomineral vs. inorganic nitrogen and phosphorus fertilizers: impact on wheat nutritional status, productivity, and grain quality. Journal of Soil Science and Plant Nutrition https://doi.org/10.1007/s42729-024-02045-9
The literature presents conflicting findings
regarding the efficacy of organomineral fertilizers (OMFs) in comparison to
inorganic counterparts. Furthermore, limited information is available comparing
these fertilizer sources in terms of wheat (Triticum aestivum L.) productivity,
especially in Mollisols from humid regions. Therefore, this study aims to
evaluate and compare the effectiveness of OMFs with that of inorganic
fertilizers as nitrogen (N) and phosphorus (P) sources, with a focus on their
influence on wheat nutrition, yield, and grain quality. Three field trials were
conducted in the Argentinean Pampas to compare OMFs enriched with N and P (OMF
+ N and OMF + P) against urea and monoammonium phosphate, respectively. The
greenness index (GI) and normalized difference vegetation index (NDVI) were
measured to characterize the nutritional status of the crop. Grain yield and
quality parameters (i.e., hectolitre weight, protein, and gluten concentration)
were determined. The main findings of this study were: (i) the combined
application of OMF + N and OMF + P increased wheat yield by 13% (588 kg ha−1)
compared to inorganic fertilizers; (ii) OMF + N exhibited slower N release
compared to urea; (iii) GI and, particularly, NDVI were related to grain yield
(R2 = 0.71 and 0.81, respectively); and (iv) fertilizer sources did
not affect grain quality parameters. In conclusion, OMFs offer a suitable
option for contributing to the recycling of nutrients in agroecosystems and
reducing reliance on inorganic fertilizers, allowing increased wheat yield
while maintaining grain quality in Mollisols of humid regions.
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