Effect
Increased produce quality
No effect on produce quality
Increased nitrogen N use efficiency
Trainer treated lamb's lettuce, cv. Princess HM CLAUSE, subject to varying fertilisation rates (100%, 50% or 0% optimum), showed significantly increased marketable yield (no difference at 100% fertilisation), increased SPAD index, increased nitrogen use efficiency (+18.8%), increased nitrogen uptake efficiency (+73.3%), increased chlorophyll a content (+26.6%), increased chlorophyll b content (+43.9%), increased total chlorophyll content (+32.4%), increased nitrate content (+571.1%), no difference in lipophilic antioxidant activity (-4.2%), increased hydrophilic antioxidant activity (+6.3%), no difference in total phenols content (-4.1%) and no difference in ascorbic acid content (-5.2%), compared to untreated control plants.
Trial details
Polytunnel, grown in pots (sandy soil), two consecutive growing seasons, varied nitrogen fertilisation rates (100% - 5 g/m², 50% - 2.5 g/m² or 0% optimum)
Italy
Crop
Lamb's lettuce, Valerianella locusta L.
Trial application
Method
Foliar spray
Timing
First application at 21 days after sowing, followed by 3 treatments with a 6-days interval (27, 33 and 39 days after sowing)
Rate
4mL/L at 1000L/ha
2020
Nitrogen Use and Uptake Efficiency and Crop Performance of Baby Spinach (Spinacia oleracea L.) and Lamb’s Lettuce (Valerianella locusta L.) Grown under Variable Sub-Optimal N Regimes Combined with Plant-Based Biostimulant Application
Agronomy
10 (2)
278
Crop group
