application · Nutrient: content · Lactuca sativa (garden lettuce)

The Forms of Fe Introduced into Spinach and Lettuce by Soaking Method and Their Changes During Storage. · 2001

• positive
  Leaf Fe content of lettuce after soaking was 2.9 times that of the control.

  compared with control

COMBINED EFFECT OF N-FERTILIZATION LEVELS AND FOLIAR APPLICATION WITH Ca Cl2 AND CITRIC ACID ON YIELD AND NITRATE CONTENT OF LETTUCE PLANTS · 2007

• positive
  40 kg N with CaCl2 gave highest Ca percentage.
• positive
  80 kg N with either foliar spray gave highest N, P and K percentages and uptake.

  compared with other treatments

Effects of Foliar Application of Zn Fertilizer on Nitrate Content and Nitrate Reductase(NR) Activity in Different Lettuce Organs · 2008

• positive
  Nitrate content was lowest with 0.05% foliar zinc.

The effect of CaCl2 foliar treatment (before harvest) on the accumulation of nitrates and nitrites in fresh and stored butterhead lettuce · 2011

• positive
  Pre-harvest foliar CaCl2 treatment significantly decreased nitrate levels in whole leaves of fresh lettuce.

Testing irrigation, day/night foliar spraying, foliar calcium and growth inhibitor as possible cultural practices to reduce tipburn in lettuce · 2012

• positive
  Foliar calcium increased calcium content in young lettuce leaves.

Effects of the foliar application of silicon and cerium sol on relieving toxicity of Pb,Cd in the lettuce · 2012

• positive
  Foliar silicon and cerium sols lowered root to shoot Cd or Pb concentration ratios relative to water.

  compared with foliar application of water

Testing irrigation, day/night foliar spraying, foliar calcium and growth inhibitor as possible cultural practices to reduce tipburn in lettuce · 2012

• positive
  Frequent foliar Ca applications significantly increased Ca content in young leaves.

Spraying Silicon and/or Cerium Sols Favorably Mediated Enhancement of Cd/Pb Tolerance in Lettuce Grown in Combined Cd/Pb Contaminated Soil · 2013

• positive
  Silicon and cerium sol sprays inhibited Cd/Pb absorption in lettuce.

Effect of N Fertigation Rates and Humic Acid on The Productivity of Crisphead Lettuce (Lactuca sativa L.) Grown in Sandy Soil · 2016

• positive
  An 800 mg l-1 humic acid drench gave the highest N, P, and K uptake.

Effects of iron, manganese and zinc enriched coffee and tea wastes on lettuce – a field trial · 2017

• positive
  Lettuce heads accumulated significantly higher amount of iron after soil application of enriched wastes.

Effectiveness of Organic Fertigation and Moringa Leaf Extract Spray as an Alternative to Chemical Fertigation for Improving Yield and Quality of Lettuce under Soilless Condition · 2019

• positive
  Moringa extract spray reduced nitrate to 463.46 mg per plant in 2014 versus 497.14 without spray.

  compared with mineral nutrition without spray

• positive
  Moringa extract spray reduced nitrate to 450.16 mg per plant in 2015 versus 476.8 without spray.

  compared with mineral nutrition without spray

Stimulation Effects of Foliar Applied Glycine and Glutamine Amino Acids on Lettuce Growth · 2019

• positive
  1000 mg/L glycine spray significantly increased leaf Fe concentration compared with control.

  compared with control

• no effect
  Foliar glycine and glutamine did not significantly increase leaf mineral concentrations, except iron.

Preparation Protein Hydrolysates from Fish by-product and Study Effected on Lettuce (Lactuca sativa L.) Growth, Yield, Quality and Enhanced Salt Tolerance · 2019

• positive
  T2 reduced nitrate content significantly.

Effects of Humic Acid And Bread Yeast on Growth And Yield of Lettuce (lactuca Sativa L.) under Protected Conditions · 2020

• positive
  Foliar yeast at 5 g/L gave the highest leaf mineral content (nitrogen, potassium and phosphorus) of lettuce among the treatments.

  compared with control and other treatments

An attempt to use Moringa products as a natural nutrients source for Lettuce organically production · 2022

• positive
  Combined seed cake and 10g/L foliar extract produced the lowest nitrate content.

Effect of iron and zinc spray and nitrogen fertilization levels on some nutrients concentration in lettuce (Lactuca sativa L.) · 2022

• positive
  Spraying iron and zinc alone or together significantly increased leaf Fe and Zn concentrations in lettuce.
• positive
  Spraying iron and zinc alone or together significantly increased leaf N, P and K concentrations in lettuce.

[Effects of Different Control Measures on Cadmium and Lead Accumulation and Quality in Lettuce]. · 2023

• positive
  Spraying 0.8% FAK-Zn reduced Pb content in edible lettuce parts by 60% relative to CK.

  compared with CK

• positive
  Spraying 0.8% FAK-Zn reduced Cd and Pb enrichment coefficients in lettuce.

  compared with CK

• positive
  Spraying 0.8% FAK-Zn reduced Cd content in edible lettuce parts by 77% relative to CK.

  compared with CK

Novel Biodegradable Chelating Agents for Micronutrient Fertilization · 2023

• positive
  Foliar applied IGSA raised uptake 1.1 times over IDS.

  compared with IDS-based complex

• positive
  Foliar applied IGSA raised total mineral uptake 1.8 times over EDTA.

  compared with EDTA-based complex

RESPONSE OF YIELD AND HEAD QUALITY OF LETTUCE TO NITROGEN FERTILIZATION AND SEAWEED EXTRACT FOLIAR APPLICATION UNDER NEW VALLEY CONDITIONS · 2024

• positive
  fertilizing lettuce plants with 90 kg N/fed. and foliar spraying with SWE at 6 ml/l significantly enhanced leaves content of N, P, and K.

Foliar Spraying Zinc–Carbon Dot Nanofertilizer Promotes Yield and Quality of Lettuce (Lactuca sativa L.) through Leaf–Root Regulation · 2025

• positive
  Nano-ZCD spraying improved lettuce Zn content by 41.2%.

cited by 1 paper here

Alginate/okra gum microcapsules containing fulvic acid for agricultural applications · 2025

• positive
  Foliar encapsulated fulvic acid significantly improved lettuce chemical composition by increasing N, P, K, Na, Fe, Cu, Mn and Zn levels.

  compared with 0%

Supplementation with Fe3O4 and ZnO nanoparticles as a strategy for agronomic bioenrichment of lettuce and cucumber · 2025

• positive
  In lettuce, high doses of Fe3O4 and ZnO NPs by foliar application increased Zn content by 45 %.
• positive
  Drenching with 100 ppm Fe3O4 NPs increased Fe content by 80 % compared with control.

  compared with control

• positive
  Foliar application of 250 ppm ZnO NPs increased Zn content by 26 % compared with control.

  compared with control

• positive
  In lettuce, high doses of Fe3O4 and ZnO NPs by foliar application increased Fe content by 26 %.

cites 1 paper here