Summary
This two-season field trial examined how compost amendment (0, 15, or 30 tonnes/ha) affects Nigella sativa performance under three irrigation regimes (100%, 75%, or 50% of crop evapotranspiration). Compost application significantly improved soil water-holding capacity and organic matter, and substantially mitigated the detrimental effects of drought stress on seed yield, oil content, and fatty acid composition. The highest compost rate (30 tonnes/ha) increased seed yield by 34.7%, fixed oil by 46.6%, and essential oil by 58.1% compared to the control, suggesting that organic soil amendment is an effective drought-resilience strategy for this crop.
UK applicability
The findings are of limited direct applicability to UK commercial agriculture, as Nigella sativa is not a staple crop in British farming systems and UK growing conditions differ substantially from the trial location. However, the underlying principles—that compost amendment improves soil water retention and enhances crop resilience to water stress—are broadly relevant to UK horticulture and may inform practices for improving drought tolerance in temperate cropping systems.
Key measures
Soil porosity, permeability, pore geometry, water-holding capacity, organic content, cation exchange capacity; plant growth traits; osmoprotectant substances (proline, free amino acids, carbohydrates, soluble sugars); fixed oil content; essential oil content; saturated and unsaturated fatty acid profiles; seed yield
Outcomes reported
The study measured soil properties (porosity, permeability, water-holding capacity, organic content, cation exchange capacity), morphophysiological and biochemical traits of Nigella sativa plants, seed yield, oil content (fixed and essential oil), and fatty acid profiles under three irrigation regimes and three compost application levels. Results demonstrated that compost amendment significantly improved these parameters and mitigated negative effects of water stress on plant performance.
Topic tags
Dig deeper with Pulse AI.
Pulse AI has read the whole catalogue. Ask about this record, its theme, or how the findings apply to UK farming and policy — every answer cites the underlying studies.