Effect of AMF Inoculation on Reducing Excessive Fertilizer Use

Area of Science:

• Agricultural Science
• Soil Science
• Mycology

Background:

• Excessive chemical fertilizer use poses global environmental challenges.
• Arbuscular mycorrhizal fungi (AMF) form symbiotic relationships with crops, offering a sustainable alternative.
• AMF can enhance nutrient uptake and plant growth.

Purpose of the Study:

• To evaluate the impact of AMF inoculation on maize yield, fertilizer efficiency, plant traits, and soil nutrients.
• To investigate AMF efficacy under reduced chemical fertilizer regimes.
• To determine the role of phosphorus supplementation in enhancing AMF benefits.

Main Methods:

• Field study with reduced fertilizer application (30% reduction).
• Inoculation of maize with AMF.
• Application of pure chemical fertilizers versus mixed fertilizers with phosphorus supplementation.
• Measurement of grain yield, fertilizer use efficiency, plant traits, root colonization, soil mycelium density, and soil nutrients.

Main Results:

• Phosphorus supplementation after fertilizer reduction enhanced AMF's positive effect on grain yield (3.47% with chemical, 6.65% with mixed fertilizers).
• AMF inoculation significantly increased root colonization and soil mycelium density.
• Mixed fertilizer treatments with phosphorus supplementation showed greater mycorrhizal benefits on plant traits and soil nutrients compared to chemical fertilizers.
• AMF did not significantly alter nitrogen and phosphorus fertilizer use efficiency.

Conclusions:

• AMF inoculation, combined with appropriate fertilization strategies (especially phosphorus supplementation), can sustain or enhance maize yields while reducing chemical fertilizer input.
• This symbiotic approach offers a viable strategy for more sustainable agriculture.
• Fertilization regimes significantly influence the effectiveness of AMF in agricultural systems.