Soil-Water-Plant Relations and Growth Response of Curly Lettuce to Integrated Microbial and Reduced Chemical Fertilization

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Combining microbial fertilizer with a 50% reduction in chemical fertilizers significantly affects the growth performance of curly lettuce under greenhouse conditions. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Zeynep Demir; Levent Değirmenci; Dilek Kaya Özdoğan

doi:10.47115/bsagriculture.1946779

September 14, 2026Black Sea Journal of Agriculture

Soil-Water-Plant Relations and Growth Response of Curly Lettuce to Integrated Microbial and Reduced Chemical Fertilization

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Key Points

To assess whether combining a Streptomyces-based microbial fertilizer with a 50% reduction in synthetic chemical fertilization maintains or improves curly lettuce growth under greenhouse conditions.
Arranged a completely randomized greenhouse experiment with seven treatments across four replications: unfertilized control, optimum chemical fertilization, three 50% reduced chemical fertilizer treatments combined with microbial fertilizer (5, 10, or 20 mL L⁻¹), and two sole microbial fertilizer treatments (10 or 20 mL L⁻¹).
Supplied irrigation at four-day intervals to restore soil moisture to field capacity based on pot weight, recording seasonal evapotranspiration and harvest measurements of fresh weight, dry weight, and head diameter.
Total seasonal evapotranspiration for curly lettuce reached 214.2 mm during the experimental period under pot-weight-monitored irrigation.
Treatment effects produced statistically significant differences in curly lettuce growth parameters, including fresh weight, dry weight, and head diameter.

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Implication

Controlled experiment demonstrates significant growth responses in curly lettuce to microbial fertilizer with reduced chemical fertilizer, highlighting sustainable crop management strategies.

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Demir et al. (2026) studied this question.

synapsesocial.com/papers/6aa913e49013453be30a2290 https://doi.org/10.47115/bsagriculture.1946779

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Soil-Water-Plant Relations and Growth Response of Curly Lettuce to Integrated Microbial and Reduced Chemical Fertilization

Key Points

No abstract yet

Implication

Discussion

Cite This Study

Soil-Water-Plant Relations and Growth Response of Curly Lettuce to Integrated Microbial and Reduced Chemical Fertilization

Key Points

No abstract yet

Implication

Discussion

Cite This Study

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