Effect
Increased produce quality
Kelpak treated baby Lettuce, cv. Zarina, grown under different N rates had on average a significant higher yield, a significant higher LAI, a 13 % lower specific leaf weight, leaves had a 7.8 % significant higher succulence and contained 32.7 % significant more nitrates, 3.7 % more chlorophyll and 16.8 % significant more carotenoids compared to the untreated control. There wasn't an interaction effect between the biostimulant and the N rate, when a result was significant it was the case for every N rate.
Trial details
outdoor, unheated plastic tunnel, soil grown, 4 different N rates (0, 10, 20 or 30 kg/ha)
Italy
Crop
Lettuce, Lactuca sativa L.
Trial application
Method
Foliar spray
Timing
First application 3 weeks after sowing, followed by 4 treatments with a 7-days interval
Rate
3 mL/L
2019
Effect of Vegetal- and Seaweed Extract-BasedBiostimulants on Agronomical and Leaf QualityTraits of Plastic Tunnel-Grown Baby Lettuce underFour Regimes of Nitrogen Fertilization
Agronomy
9
1-15
Crop group
