Nano NPK foliar application increased seed nitrogen content compared with lower levels.

application · nutrient: content · Helianthus annuus (common sunflower)Positive and negative results

23 papers in the same direction as this claim · 1 in the opposite direction

1. negative
   Foliar ZnO significantly decreased kernel Zn content compared with control.

   Mahmoud, A. M.1; E. A. Ali1; Manal A. M. Hassan2* and Asmaa S. A. Sayed1 1 Department of Agronomy, Faculty of Agriculture, Assiut University, Assiut, 71526, Egypt 2 Food Science and Technology Department, Faculty of Agriculture, Assiut University, Assiut 71526, Egypt · 2019 · compared with control one

   Opposite direction

2. positive
   Both ZnO forms decreased leaf Na content.

   Effects of foliar spray of two kinds of zinc oxide on the growth and ion concentration of sunflower cultivars under salt stress · 2015

   Same direction

3. positive
   All foliar B spray rates increased the B concentration in various parts of the plant tops, including parts that developed after spraying.

   Effects of Boron Foliar Applications on Vegetative and Reproductive Growth of Sunflower · 2003

   Same direction

4. positive
   Foliar zinc sulfate produced the highest leaf zinc concentration in the first year, 162 mg kg−1.

   Zinc Application Effects on Yield and Seed Oil Content of Sunflower Grown on a Saline Calcareous Soil · 2006

   Same direction

5. positive
   Micro-XRF imaging showed a clear enrichment of Zn in the vascular tissues of sunflower petioles treated with foliar Zn fertilizers.

   Supplemental macronutrients and microbial fermentation products improve the uptake and transport of foliar applied zinc in sunflower (Helianthus annuus L.) plants. Studies utilizing micro X-ray florescence · 2015

   Same direction

6. positive
   Foliar-applied SA improved leaf and root Ca2+ concentrations.

   Does exogenous application of salicylic acid improve growth and some key physiological attributes in sunfl ower plants subjected to salt stress? · 2012

   Same direction

7. positive
   Foliar treatment was more effective for sunflower Fe content in some cases.

   EDTA-Coated Fe3O4 Nanoparticles: a Novel Biocompatible Fertilizer for Improving Agronomic Traits of Sunflower (Helianthus Annuus) · 2015

   Same direction

8. positive
   Fe-Asp produced greater essential amino acid accumulation and nutrient acquisition than FeSO4.

   Foliar Spray of Fe-Asp Confers Better Drought Tolerance in Sunflower as Compared with FeSO4: Yield Traits, Osmotic Adjustment, and Antioxidative Defense Mechanisms · 2020 · compared with FeSO4

   Same direction

16 papers more in this group

fertilization · nutrient: content · Helianthus annuus (common sunflower)Positive and negative results

63 papers in the same direction as this claim · 7 in the opposite direction

1. negative
   High pH in the nutrient solution restricted Fe uptake and shoot translocation in sunflower, independently of N form, inducing Fe deficiency chlorosis at low Fe supply.

   Nitrate Does Not Result in Iron Inactivation in the Apoplast of Sunflower Leaves · 2003

   Opposite direction

2. no effect
   Exudates from detopped sunflower plants contained the same amount of boron whether roots were immersed in 500 or 1,000 μg per liter nutrient solutions.

   Absorption and Translocation of Boron by Sunflower Plants · 1965 · compared with 1,000 μg of boron per liter

   Opposite direction

3. no effect
   Low irrigation and high fertilizer did not enhance sunflower nitrogen absorption.

   Coupling effects of water and nitrogen on photosynthetic characteristics, nitrogen uptake, and yield of sunflower under drip irrigation in an oasis · 2021

   Opposite direction

4. negative
   Potassium to sodium ratios in sunflower decreased with greater EC values of the nutrient solution and low soil ODR.

   Interactions of oxygen‐nitrogen‐salinity stresses on plant growth and mineral content of sunflower (Helianthus annuus L.) in sand culture · 1981

   Opposite direction

5. negative
   Compost without Fe lowered Fe content in sunflower

   Einfluß von Müllkompost und Eisenverbindungen auf die Eisen‐, Zink‐ und Manganaufnahme von Sonnenblumen und Mais im Gefäßversuch · 1978

   Opposite direction

6. negative
   High pH in the nutrient solution restricted Fe uptake and shoot translocation in sunflower, independently of N form.

   イギリスにおけるホスピス・ボランティアの教育・訓練に関する研究 · 2004

   Opposite direction

7. no effect
   Increasing phosphate fertilizer at depth did not increase sunflower phosphorus accumulation, even under water stress.

   Interference from the vertical variation of soil phosphorus and from water stress on growth in maize, the soybean and sunflower · 2017

   Opposite direction

8. positive
   Biomass incorporation with fertilizer built up soil nutrients relative to fallow.

   Effects of long‐term legume cover crop incorporation on soil organic carbon, microbial biomass, nutrient build‐up and grain yields of sorghum/sunflower under rain‐fed conditions · 2007 · compared with fallow plots

   Same direction

62 papers more in this group

nanoparticle · nutrient: content · Helianthus annuus (common sunflower)Results agree

6 papers in the same direction as this claim

1. positive
   Nano-Fe-EDTA increased sunflower Fe content by 137% relative to control.

   EDTA-Coated Fe3O4 Nanoparticles: a Novel Biocompatible Fertilizer for Improving Agronomic Traits of Sunflower (Helianthus Annuus) · 2015 · compared with the control

   Same direction

2. positive
   Nano-sulfur improved available sulfur in soil.

   Synthesis and Characterization of Nano-Sulfur and Its Impact on Growth, Yield, and Quality of Sunflower (Helianthus annuus L.) · 2022

   Same direction

3. positive
   Nano-B was prominent for B concentrations on old leaves of sunflower in alkaline soil.

   Effect of Synthetic Nano-Calcium Borate as an Alternative Boron Fertilizer on the Growth and Boron Utilization of Sunflower Plant · 2023

   Same direction

4. positive
   Nano-Fe-EDTA raised plant iron content by 137% relative to control.

   Improving Agronomic Traits of Sunflower (Helianthus Annuus) · 2015 · compared with the control

   Same direction

5. positive
   Nano fertilizers gave higher nitrogen use efficiency than conventional fertilizer, at 72.01 kg kg-1.

   Evaluating the Varied Impacts of Conventional Versus Nano Fertilizers on Soil Nutrient Levels, Utilization Efficiency and Biological Activity in Acidic Soil · 2024 · compared with conventional one

   Same direction

6. positive
   Nutrient uptake was higher with nano DAP sprayed at two stages.

   Performance of sunflower (Helianthus annuus L.) under different levels of granular fertilizers and nano fertilizers · 2025

   Same direction