Effect
Increased produce quality
Kelpak treated Lettuce grown in a greenhouse with half strength nutrient solution had the same dry weight, leaves contained more K, the same amount of Ca and significant more Mg; Treated Lettuce grown with single strength nutrient solutions had less dry weight, leaves contained significant more K, the same amount of Ca and significant less Mg; Treated Lettuce grown with double strength nutrient solution had significant more dry weight, leaves contained significant more K, significant more Ca and significant more Mg compared to the untreated control grown in the same nutrient conditions.
Trial details
indoor, greenhouse, pots filled with acid washed sand, 3 different nutrient regimes (half, single or double strengths nutrient solution)
South Africa
Crop
Lettuce, Lactuca sativa L.
Trial application
Method
Root drench
Timing
First application 15 days after planting, followed by 2 treatments with a 30-days interval
Rate
0,20 % or 0,40 % solution per pot
1990
Effect of seaweed concentrate on the growth and mineral nutrition of nutrient-stressed lettuce
Applied Phycology
2
269-272
Crop group
