Summary
This field trial evaluated the interactive effects of vesicular arbuscular mycorrhizal (VAM) fungal inoculation on nutrient acquisition and yield in rainfed lowland rice under factorial combinations of nitrogen and phosphorus fertiliser rates. The results indicate that VAM inoculation enhanced uptake of nitrogen, phosphorus, and potassium whilst enabling reduced fertiliser application rates (90 kg N/ha and 75 kg P/ha) to achieve equivalent productivity, suggesting potential for improved nutrient-use efficiency and input optimisation in rainfed rice systems.
Regional applicability
The findings may have limited direct applicability to UK rice cultivation, which is not commercially significant. However, the methodology and principles of mycorrhizal-assisted nutrient efficiency could inform research on similar biofertilisation strategies in UK cereal crops, particularly for rainfed systems or marginal soils with low nutrient availability.
Key measures
Nitrogen uptake, phosphorus uptake, potassium uptake, grain yield, fertiliser application rates (N: 0, 45, 90, 135 kg/ha; P: 0, 25, 50, 75 kg/ha)
Outcomes reported
The study measured nitrogen, phosphorus, and potassium uptake in rice tissue and grain yield under varying nitrogen (0–135 kg/ha) and phosphorus (0–75 kg/ha) fertiliser rates with vesicular arbuscular mycorrhizal (VAM) fungal inoculation in rainfed lowland rice fields. Results demonstrated that VAM inoculation increased nutrient acquisition and yield at 90 kg N/ha and 75 kg P/ha compared to unfertilised controls.
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