nitrogen · Growth · Helianthus annuus (common sunflower)

SOIL VOLUME AND FERTILIZER EFFECTS ON GROWTH AND NUTRIENT CONTENTS OF SUNFLOWER PLANTS · 1970

• positive
  Added nitrogen increased growth by 30–60%.
• no effect
  Nitrogen and phosphorus fertilizers compensated little, if at all, for small soil volumes that reduced sunflower growth.

Effects of Fertilizers on the Composition and Emergence of Sunflower Seeds · 1978

• positive
  The same fertilizer combination gave maximum seed emergence of 85·0%.

  compared with basal level of nitrogen and phosphorus

Distribution of Nitrogen during Growth of Sunflower (Helianthus annuus L.) · 1983

• positive
  Sunflower plants receiving 6 mM nitrate accumulated more dry matter than urea-grown plants.

  compared with urea-grown plants

Leaf and Floret Production in Sunflower (Helianthus annuus L.) as Affected by Nitrogen Supply · 1983

• positive
  Relieving nitrogen stress in mid vegetative growth restored final leaf number to the unstressed number.

  compared with unstressed number

cited by 1 paper here

Response of sunflower cultivars to plant density and nitrogen · 1985

• positive
  Nitrogen application improved leaf area, head size and filled seed percentage up to 60 kg/ha.

cited by 1 paper here

Effect of potassium on growth and the electrophoretic pattern of leaf proteins of sunflower supplied with ammonium or nitrate · 1990

• positive
  Dry matter and organic nitrogen content were higher in plants supplied ammonium + nitrate with potassium than in nitrate-grown plants

  compared with nitrate grown plants

• no effect
  Growth with ammonium + nitrate was comparable to growth with nitrate in the presence of potassium

  compared with nitrateNo difference from an alternative treatment

• negative
  Plants grown on ammonium-N only grew significantly less than plants supplied nitrate or ammonium + nitrate with potassium

  compared with nitrate or ammonium + nitrate in the presence of potassium

Nutrient-limited growth rates: quantitative benefits of stress responses and some aspects of regulation · 1995

• positive
  Low nitrate or phosphate increased root:shoot ratio and uptake kinetic parameters.

Effect of irrigation and nitrogen on oil percentage, yield and water-use efficiency of winter sunflower (Helianthus annuus) · 2001

• positive
  Leaf-area index and ancillary traits were maximal with three irrigations and 40 kg N/ha.

THE INFLUENCE OF TWO APPLYING METHODS OF MICRONUTRIENTS MIXTURE WITH DIFFERENT LEVELS OF NITROGEN FERTILIZATION ON SUNFLOWER PLANTS GROWN UNDER SANDY SOIL CONDITIONS. · 2002

• positive
  Increasing nitrogen from 30 to 120 kg N/fed increased plant height, leaf area per plant and specific leaf weight of sunflower

Photosynthetic attributes and seed yield of sunflower (Helianthus annuus L.) as influenced by different levels and ratios of nitrogen and phosphorus fertilizers · 2003

• positive
  Higher-nitrogen N/P treatments had significantly greater leaf area and LAI than lower ratios and control later.

  compared with N/P ratios of <1.0 and the control

Quantitative and qualitative traits of sunflower (Helianthus annuus L.) as influenced by planting dates and nitrogen application · 2004

• positive
  Early sowing with 150 kg N ha-1 increased sunflower leaf area per plant.

  compared with 30 August

• positive
  Early sowing with 150 kg N ha-1 increased sunflower plant height.

  compared with 30 August

cited by 1 paper here

Effects of Different Nitrogen Forms on the Growth and Photosynthesis of Sunflower (Helianthus annuus) · 2005

• positive
  Nitrate nitrogen fertilization gave significantly higher plant height, leaf area and dry matter of sunflower than ammonium nitrogen.

  compared with ammonium nitrogen

(70) Hydroponic Sunflower Production as Influenced by Cultivar, Nitrogen Fertilization, and Root-knot Nematode Infestation · 2005

• positive
  Dry weight of Mezzulah sunflower increased with increasing N rate.
• negative
  Dry weight of Golden Cheer sunflower decreased with increasing N rate.

Induction of leaf senescence by low nitrogen nutrition in sunflower (Helianthus annuus) plants · 2009

• positive
  High nitrate increased leaf area and specific leaf mass relative to low nitrate.

  compared with 2 mM nitrate

Response of sunflower (Helianthus annuus L.) to nitrogen application in a savanna Alfisol · 2010

• positive
  At 120 kg N ha-1, the highest sunflower heights were 120 cm in 2003 and 138 cm in 2004.

cited by 2 papers here

EFFECT OF NITROGEN FERTILIZER RATES AND FOLIAR FERTILIZATION ON GROWTH, YIELD AND YIELD COMPONENTS OF SUNFLOWER · 2010

• positive
  Foliar nutrient application of urea markedly improved sunflower growth traits.
• positive
  Plant height, leaf area and dry matter per plant of sunflower significantly increased with increasing nitrogen level.

Effects of nitrogen supply on canopy development of maize and sunflower · 2012

• positive
  Nitrogen limitation reduced leaf area index in sunflower.

  About lacking this nutrient, so it counts the other way round

cites 2 papers here

Effect of nitrogen and boron on growth and yield attributes of sunflower (Helianthus annuus L.) · 2012

• positive
  Maximum growth occurred at 120 kg N/ha plus 0.2% boron spray.

The Effects of Nitrogen Mineral on Yield Performance of Sunflower (Helianthus Annuus L.) in Bauchi State, Nigeria · 2012

• positive
  Leaf area, plant dry weight and crop growth rates increased with nitrogen rate.
• positive
  Applying 120kg N ha -1 produced higher crop vigour than other N rates at stated sampling times.

  compared with other N rates

• positive
  Applying 90kg N ha -1 accelerated crop growth in the 2011 wet season.

  compared with other N rates

Comparison Effect of different Seed priming methods on Sunflower Germination and seedling growth · 2013

• positive
  Urea priming significantly increased radicle and shoot length.
• positive
  Urea and KNO3 priming increased seedling growth more than PEG.

  compared with PEG

• no effect
  Urea priming had no positive significant effect on germination percentage.

Effect of nitrogen and sulphur on growth, yield and quality of sunflower (Helianthus annuus l.) · 2013

• positive
  Plant height, number of leaves per plant and leaf area index increased significantly with each increment of nitrogen up to 120 kg/ha and sulphur up to 30 kg/ha.

Effect of nitrogen and sulphur on growth, yield and quality ofsunflower (Helianthus annuus L.) · 2013

• positive
  Increasing nitrogen up to 120 kg/ha increased plant height, leaves per plant and leaf area index of sunflower.

Biometry and Water Consumption of Sunflower as Affected by NPK Fertilizer and Available Soil Water Content under Semiarid Brazilian Conditions · 2014

• positive
  Leaf number increased significantly with nitrogen, phosphorus, and potassium fertilizer amount.
• no effect
  Nitrogen and potassium did not affect sunflower plant height.

cites 2 papers here

Effect of Nitrogen Fertilizer Application Levels on Morphological Traits, Yield and Yield Components of Sunflower (Cultivar Masters) · 2014

• positive
  Nitrogen application increased plant height, diameter and stem diameter.

cites 1 paper here

INTEGRATED NITROGEN AND BORON FERTILIZATION IMPROVES THE PRODUCTIVITY AND OIL QUALITY OF SUNFLOWER GROWN IN A CALCAREOUS SOIL · 2015

• positive
  Individual nitrogen application significantly increased sunflower plant height and stem and head diameters.

cited by 1 paper here

Effect of Different Levels of Nitrogen and Planting Patterns on Dry Matter Production and Growth Physiological Indices in Intercropping Maize and Sunflower · 2015

• positive
  Nitrogen up to 150 kg.ha -1 significantly increased sunflower height and fresh weight.

Root System, Phenology and Yield of Sunflower in Relation to Nitrogen and Phosphorus · 2015

• positive
  N increases sunflower canopy dry matter (CDM).
• no effect
  Grain size did not change with N and P.

Influence of sunflower stover and nutrient management on growth, yield and energetics of sunflower (Helianthus annuus) in a pigeonpea (Cajanus cajan)- sunflower cropping system · 2016

• positive
  Recommended N and P dose increased sunflower growth parameters significantly.

Production of sunflower under saline water irrigation and nitrogen fertilization · 2016

• positive
  Increasing nitrogen rates stimulated chapter biomass.

Emergence and growth dynamicsof springsunflower(Helianthus annuusL.) in relation to sowing dates, densities and nitrogen rates · 2016

• positive
  Nitrogen increased AGR, CGR and RGR.
• positive
  Nitrogen improved SLW only after day 50.
• positive
  Nitrogen improved NAR up to day 75.
• negative
  Nitrogen lowered NAR between day 75 and maturity versus control.

  compared with control

Effect of CO₂ enrichment and increased nitrogen supply on the induction of sunflower (Helianthus annuus L.) primary leaf senescence · 2016

• positive
  Sunflower grown under enriched CO2 and high nitrogen supply grew faster than under elevated CO2 with low nitrogen supply.

  compared with elevated CO 2 with low nitrogen supply

Effects of biochar and fertilizer management on sunflower (Helianthus annuusL.) feedstock and soil properties · 2016

• positive
  High nitrogen increased whole-plant above-ground biomass by 18%.

  compared with control nitrogen treatment

Shoot and Root Biomass Allocation of Sunflower Varying with Soil Salinity and Nitrogen Applications · 2017

• positive
  After bud initiation, a moderate N application rate accelerated shoot and root biomass accumulation at the S0 and S1 levels.
• negative
  A moderate N application rate had a detrimental effect on sunflower seedling growth at the S1 salinity level.
• negative
  At the S2 level, a moderate N application rate aggravated salt stress and inhibited sunflower growth at the flowering and mature stages.

Effect of Different Levels of Nitrogen, Sulphur and Foliar Application of Boron in Sunflower (Helianthus annuus L.) · 2017

• positive
  Treatment T8 produced higher capitulum diameter of 14.93 cm.
• positive
  Treatment T13 gave significantly higher plant height of 130.60 cm.

cited by 1 paper here

Physiology, growth and productivity of staggered sown spring sunflower (Helianthus annuus) in response to varying intra-row spacing and applied nitrogen in the Indo-Gangetic Plains · 2017

• positive
  Nitrogen improved seed dry matter partitioning significantly up to 75 kg N/ha in 2015.

The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status · 2018

• positive
  High nitrogen increased stem, leaf and shoot dry matter.

Influence of staggered sown Spring sunflower ( Helianthus Annuus L.) at varying intra–row spacing and applied–N on pre– and post–anthesis N dynamics and dry matter partitioning in Indo–Gangetic Plains Region · 2018

• positive
  Nitrogen improved seed dry matter partitioning significantly up to 75 kg N ha–1 in 2015.

Responses of Linoleic and High Oleic Type Sunflower Varieties (Helianthus Annuus L.) to Nitrogen and Potassium Applications · 2018

• positive
  Nitrogen application increased sunflower dry matter.

cites 1 paper here

Behavior of Sunflower Irrigated With Salt Water and Nitrogen Fertigation · 2019

• positive
  Nitrogen fertigation at 10 days after emergence increased sunflower stem diameter.

Appropriate Nitrogen and Phosphorus Fertilizer Regime for Sunflower ( Helianthus Annuus L.) In the Humid Tropics · 2019

• positive
  N and P fertilizer, applied split or single, significantly increased plant height at R5 and R9, 100 achene weight and achene weight per head over the control in both years.

  compared with Control

Growth and Yield Response of Sunflower Helianthus annuus l to Spacing and Nitrogen Fertilization in Southern Guinea Savanna Ecological Zone of Nigeria · 2019

• positive
  Applying 120 N kg ha 1 produced the highest leaf numbers, 18.76 and 18.83.
• positive
  Applying 120 N kg ha 1 gave the biggest stem girth, 3.03 and 3.12 cm.

The effect of N based fertilizer and soil type on the performance of sunflower (Helianthus annuus) · 2020

• positive
  At 180 kg N/ha sunflower had large leaf area of 221.4 cm2.

Effect of Levels of Nitrogen and Biofertilizers on Growth and Yield of Sunflower (Helianthus annuus L.) · 2021

• positive
  The combination had plant height of 106.26 cm at 60 DAS.
• positive
  The combination had plant dry weight of 26.67 g at 60 DAS.

INTEGRATED MANAGEMENT OF NP FERTILIZERS CAN BOOST THE GROWTH AND YIELD PERFORMANCE OF SUNFLOWER (HELIANTHUS ANNUS L.) · 2021

• positive
  Sunflower plant height was maximum at 184.25 cm with 150-50 NP kg ha-1.
• positive
  Sunflower stem girth was maximum at 6.66 cm with 150-50 NP kg ha-1.

Effect of Nitrogen and Potassium Fertigation Schedules on Plant Growth Parameters and Fertilizer Use Efficiency of Sunflower · 2021

• positive
  N and K fertigation at 4-day intervals gave higher dry matter than the 8-day interval.

  compared with N and K at 8 days interval

• positive
  N and K fertigation at 4-day intervals gave higher leaf area index than the 8-day interval.

  compared with N and K at 8 days interval

• positive
  N and K fertigation at 4-day intervals gave higher number of leaves per plant than the 8-day interval.

  compared with N and K at 8 days interval

• positive
  N and K fertigation at 4-day intervals gave higher plant height than the 8-day interval.

  compared with N and K at 8 days interval

Effect of slow release nitrogenous fertilizers and biochar on growth, physiology, yield, and nitrogen use efficiency of sunflower under arid climate · 2022

• positive
  Neem-coated urea enhanced leaf area index at four sampled dates.
• positive
  Neem-coated urea at 148 kg N ha −1 increased crop growth rate to 19.16 g m −2 d −1.
• positive
  Neem-coated urea increased total dry matter across five dates.

Physiological Studies and Ultrastructure of Vigna sinensis L. and Helianthus annuus L. under Varying Levels of Nitrogen Supply · 2022

• positive
  Combined half-rate fertilizer gave the best growth and nitrogen response in sunflower.
• negative
  Helianthus annuus L. net assimilation rate decreased with combined full-rate potassium nitrate and urea.

Effect of Nitrogen and Spacing on Growth and Yield of Sunflower (Helianthus annuus L.) · 2023

• positive
  70 kg N/ha plus 55 X 20 cm produced the maximum plant height of 148.48 cm.
• positive
  70 kg N/ha plus 55 X 20 cm produced the maximum plant dry weight of 60.53 g.
• positive
  70 kg N/ha plus 55 X 20 cm produced the maximum capitulum diameter of 15.13 cm.

Study of Productivity and Economics of Sunflower (Helianthus annuus L.) var. KBSH – 1 as Influenced by Nitrogen and Spacing · 2023

• positive
  The 70 kg N/ha plus 45 X 20 cm treatment had maximum capitulum diameter of 15.13 cm.

Response of Sulphur and Foliar Application of Nano Urea on Growth and Yield of Sunflower (Helianthus annus L.) · 2023

• positive
  diameter of capitulum was maximal at 14.85 cm under sulphur 40 kg/ha and nano urea 3 ml/l.
• positive
  plant dry weight was higher at 70.08 g under sulphur 40 kg/ha and nano urea 4 ml/l.
• positive
  plant height was higher at 118.83 cm under sulphur 40 kg/ha and nano urea 4 ml/l.

Effects of split-applied nitrogen fertigation on sunflower (Helianthus annuus) · 2023

• positive
  Split nitrogen fertigation positively influenced sunflower leaf dry mass, leaf area and thousand seed mass.

cited by 1 paper here

Interception of photosynthetically active radiation, growth and yield of grains in sunflower under doses of nitrogen · 2023

• positive
  Nitrogen doses increased sunflower leaf area index.

NITROGEN USE EFFICIENCY IN SUNFLOWER (HELIANTHUS ANNUUS L.) INFLUENCED BY VARIOUS FERTIGATION AND BED PLANTING TECHNIQUES · 2023

• positive
  In the fertigation plus bed-sown treatment, sunflower stem diameter was higher.
• positive
  In the fertigation plus bed-sown treatment, sunflower reached a maximum plant height of 174.33 cm.

cites 1 paper here

SUNFLOWER GROWTH AND YIELD IN RESPONSE TO COMBINEDAPPLICATION OF FARMYARD MANURE AND INORGANIC FERTILIZERS(NITROGEN AND PHOSPHORUS) · 2023

• positive
  T5 gave the tallest sunflower plants, about 248.8 cm.

Synergic effect of sulfur and nitrogen on morpho-physiological and biochemical traits of sunflower · 2024

• positive
  Sulfur and nitrogen increased fresh and dry weight of sunflower relative to control

  compared with control conditions

• positive
  Sulfur and nitrogen increased root and shoot length of sunflower relative to control

  compared with control conditions

The Effect of Different Nitrogen Doses on Growth Attributes of Some Sunflower (Helianthus annuus L.) Cultivars Grown as Second Crop · 2024

• positive
  Emergence occurred earliest at 150 and 200 kg ha-1 nitrogen.

Effect of Enriching Vermicompost with Chemical and Biological Fertilizers on the Growth and Yield of Sunflower · 2024

• positive
  Vermicompost with urea and phosphate rock gave the highest sunflower plant height.

  compared with vermicompost without addition

• positive
  Vermicompost with urea and phosphate rock gave the largest flower disc diameter.

  compared with vermicompost without addition

Optimizing irrigation and nitrogen application strategies to improve sunflower yield and resource use efficiency in a cold and arid oasis region of Northwest China · 2024

• positive
  Increasing irrigation and N raised sunflower leaf area index by 15.39%−66.14% versus W1N1.

  compared with W1N1

Effect of biomass ash on yield and nutrient uptake of sunflower in vertisol · 2024

• positive
  With 50% water-soluble K through biomass briquette ash plus recommended N and P, sunflower capitulum diameter reached a maximum of 19.57 cm.

Integrated Soil Applied Fertilizers (Nitrogen, Zinc, and Boron) Effects on Growth and Yield of Sunflower · 2024

• positive
  The combination gave stem girth 12.35.
• positive
  Combined nitrogen, zinc and boron gave maximum sunflower height of 181.0 cm.

Investigating the Effects of Nitrogen and Silicon-dioxide Nanoparticles on Sunflower in the Semi-arid Region · 2025

• positive
  The longest sunflower leaves occurred with 80 kg N ha-1 plus 100 ppm SiO2.
• positive
  Nitrogen application improved sunflower plant height, leaf number and canopy width.
• negative
  Nitrogen application decreased sunflower stem diameter.

Effect of black soldier fly larval frass a novel organic manure on growth and yield of sunflower (Helianthus annuus L.) · 2025

• positive
  BSF frass nitrogen treatment significantly improved plant height, leaf area index and SPAD

Improving source-sink relationship and harvest index through assimilate partitioning in sunflower (Helianthus annuus L.) · 2026

• positive
  The combined treatment increased plant height.

  compared with others

• positive
  The combined treatment increased crop growth rate.

  compared with others

• positive
  The combined treatment increased leaf area index.

  compared with others