nitrogen · Physiology: photosynthesis · Gossypium hirsutum (cotton)

Positive and negative results31 papers: 22 positive, 9 negative or no effect

45 claims from these papers; 7 citations between them.

Papers here report positive and negative or no-effect results. No pair of them has been accepted in the claim-by-claim check.

How these papers cite each other

7 citations between these papers: 5 on the same side, 2 across the two sides.

Positive result
Negative result or no effect
Citation, pointing to the cited paper
Citation across the two sides
Larger circle: more citations overall

Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.

Papers reporting a positive result 22

Carbon Dioxide Uptake in Nitrogen‐Deficient Plants¹ · 1969
- positive
  Nitrogen deficiency decreased carbon assimilation in maize, cotton, and bean.
  About lacking this nutrient, so it counts the other way round
Effect of Nitrogen on Canopy Photosynthesis and Yield Formation in High-yielding Cotton of Xinjiang · 2002
- positive
  Excessive nitrogen improved cotton leaf photosynthesis function.
- positive
  Excessive nitrogen improved cotton canopy apparent photosynthesis in flowering and boll stages.
cited by 1 paper here
Effect of Nitrogen on Chlorophyll Fluorescence of Leaves of High-yielding Cotton in Xinjiang · 2003
- positive
  Proper nitrogen application improved cotton leaf photosynthesis, PSII activity and photochemical efficiency.
- positive
  Proper nitrogen application improved PSII non-photochemical quenching coefficients.
- positive
  Nitrogen application increased photosynthetic electron transport rate and quantum yield.
Effects of different levels of nitrogen on physiological characteristics of function leaf and plant traits and yield components of cotton · 2005
- positive
  Middle nitrogen gave the highest cotton functional leaf photosynthesis rate.
Effects of different fertilizer application combined with different DPC quantities on photosynthesis property and yield of cotton directly seeded after wheat · 2006
- positive
  Fertilizer application combined with DPC spraying can improve maximal PSⅡ light energy transformation efficiency (Fv/Fm), PSⅡ activity (Fv/Fo) and photosynthesis rate (Pn) of cotton leaves.
- positive
  Fertilizer application combined with DPC spraying can increase canopy photosynthesis rate (CAP), bolls per plant and high-quality bolls of cotton.
Effects of controlled release of N fertilizer on cotton yield · 2007
- positive
  The 150kg/hm2 treatment increased LAI and three fluorescence measures.
cited by 1 paper here
Effects of nitrogen application rates on photosynthetic and physiological characteristics and yield and quality of hybrid cotton. · 2010
- positive
  Photosynthetic and physiological indices of hybrid cotton increased at the earlier stages with nitrogen application.
- positive
  Photosynthetic and physiological characteristics of hybrid cotton increased with nitrogen rates in the range of 0-225 kg/ha.
- negative
  Photosynthetic and physiological indices of hybrid cotton decreased at the later stages under nitrogen application.
- no effect
  Photosynthetic and physiological characteristics showed no significant differences among nitrogen rates on July 5.
  compared with among different N ratesNo difference from an alternative treatment
Effects of N,P,and K Fertilizer Application on Cotton Grown in Saline Soil in Yellow River Delta · 2010
- positive
  Combined N, P and K fertilisation maintained the highest leaf area, chlorophyll content and Pn among the three treatments in low, middle and high salinity fields.
  compared with the three treatments
Comparative Effect of Nitrogen Forms on Nitrogen Uptake and Cotton Growth Under Salinity Stress · 2014
- positive
  Nitrogen accumulation in nitrate-fed plants is asserted to enhance photosynthesis under salinity.
cited by 2 papers here
Controlled‐release urea decreased ammonia volatilization and increased nitrogen use efficiency of cotton · 2017
- positive
  CRU increased net photosynthetic rates.
cited by 1 paper here
Morpho-agronomical and physiological response of cotton seedlings to low nitrogen supply · 2019
- positive
  Low nitrogen significantly reduced cotton photosynthesis.
  About lacking this nutrient, so it counts the other way round
High Nitrogen Enhance Drought Tolerance in Cotton through Antioxidant Enzymatic Activities, Nitrogen Metabolism and Osmotic Adjustment · 2020
- positive
  High nitrogen increased antioxidant enzymatic activities, leaf relative water content and photosynthesis in drought-stressed cotton seedlings.
Nitrogen Enhances Salt Tolerance by Modulating the Antioxidant Defense System and Osmoregulation Substance Content in Gossypium hirsutum · 2020
- positive
  Nitrogen increased water status, pigment synthesis and gas exchange.
cites 1 paper herecited by 1 paper here
Effects of plant density and nitrogen rate on cotton yield and nitrogen use in cotton stubble retaining fields · 2021
- positive
  Net photosynthetic rate and leaf N concentration of cotton were higher under 210 to 420 kg N ha-1 than under 0 or 105 kg N ha-1 at all three densities.
  compared with N rate of 0 or 105 kg N ha−1
Biochar and slow-releasing nitrogen fertilizers improved growth, nitrogen use, yield, and fiber quality of cotton under arid climatic conditions · 2021
- positive
  Bacterial coated urea at 160 kg ha -1 gave a higher net leaf photosynthetic rate of 32.8 μmol m -2 s -1.
cites 2 papers here
Influence of nitrogen on the growth and yield of cotton under salinity stress · 2021
- positive
  Nitrogen at 2.5 mmol·L−1 increased An in SS relative to salinity alone by 2.96-fold.
  compared with salinity treatment alone
- positive
  Nitrogen at 2.5 mmol·L−1 increased An in ST relative to salinity alone by 2.84-.
  compared with salinity treatment alone
cites 2 papers here
Effects of New Stimulators and Use of Suspension on the Dry Mass Collection and Leaf Area Formation of Cotton · 2021
- positive
  Urea suspension raised net photosynthesis productivity by 0.55-2.19 g / m2 per day versus water.
  compared with water treatment
Physiological Characteristics of Cotton Subtending Leaf Are Associated With Yield in Contrasting Nitrogen-Efficient Cotton Genotypes · 2022
- positive
  Moderate to high nitrogen significantly improved CCRI-69 photosynthesis compared with XLZ-30.
  compared with XLZ-30
cited by 1 paper here
Photosynthetic Performance and Urea Metabolism After Foliar Fertilization with Nickel and Urea in Cotton Plants · 2025
- positive
  Nickel during foliar urea fertilization significantly increased photosynthetic rate.
- positive
  Nickel during foliar urea fertilization significantly increased photosynthetic pigments.
Short-Season Direct-Seeded Cotton Cultivation Under Once-Only Irrigation Throughout the Growing Season: Investigating the Effects of Planting Density and Nitrogen Application · 2025
- positive
  Moderate nitrogen input (N2) prolonged the photosynthetic performance of the cotton canopy.
- negative
  The D1N1 treatment caused premature photosynthetic decline in cotton.
Response of Cotton to Mineral Nitrogen-Phosphorus Fertilization and Nano-Fertilizers of Zinc and Copper · 2025
- positive
  Increasing NP rate increased cotton leaf water status, nutrients, pigments, and carbohydrates.
Comparative effects of organic and inorganic fertilizers on photosynthetic pigments, oxidative metabolism, and yield in cotton (Gossypium hirsutum L.) under semi-arid field conditions · 2026
- positive
  Nitrogen-enriched chemical fertilizers positively affected photosynthesis.

Papers reporting a negative result or no effect 9

Canopy development and photosynthesis of cotton as influenced by nitrogen nutrition · 1990
- no effect
  N deficiency did not affect photosynthesis, transpiration or stomatal conductance of upper-canopy cotton leaves.
  About lacking this nutrient, so it counts the other way round
- no effect
  Canopy photosynthetic rates per unit ground area of cotton were similar between N treatments.
Methanol Effect on Upland Cotton · 1994
- no effect
  No tested foliar treatment differed for cotton photosynthesis and transpiration.
  compared with untreated check
Effects of nitrogen on cotton senescence and the corresponding physiological mechanisms. · 2009
- negative
  Low nitrogen reduced chlorophyll, soluble protein and photosynthetic rate relative to middle and high nitrogen.
  compared with mid-nitrogen and high-nitrogen treatments
Effects of nitrogen fertilization on gas exchange and chlorophyll fluorescence parameters of leaf during the flowering and boll-forming stage of cotton under short-term waterlogging. · 2010
NK combinations do not alleviate the effects of salt stress on gas exchange, photosynthetic pigments and growth of cotton (Gossypium hirsutum L.) · 2019
- no effect
  Combined nitrogen and potassium did not alleviate salt-stress effects on cotton gas exchange, pigments or growth.
Uses and losses of nitrogen by maize and cotton plants under salt stress · 2020
- negative
  Nitrogen doses beyond the recommended values exacerbated the negative effects of salinity on growth and photosynthetic rates, especially in maize under moderate to high salinity.
  compared with recommended values
Interactive effect of nitrogen fertilizer and plant density on photosynthetic and agronomical traits of cotton at different growth stages · 2021
- no effect
  At the seedling stage, cotton plant biomass production, photosynthetic rate and intercellular CO2 were unaffected by nitrogen application rate and plant density.
cites 1 paper here
Exploring genotypic variations in cotton associated with growth and nitrogen use efficiency · 2024
- negative
  Low nitrogen reduced chlorophyll content and photosynthetic efficiency.
cites 1 paper here
Hyperspectral reflectance‐based partial least squares regression models for predicting cotton leaf physiological traits · 2025
- no effect
  High nitrogen had no effect on net photosynthetic rate.

A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.

nitrogen · Physiology: photosynthesis · Gossypium hirsutum (cotton)

How these papers cite each other

Papers reporting a positive result 22

Papers reporting a negative result or no effect 9

nitrogen on Gossypium hirsutum (cotton) against other targets

nitrogen · physiology: photosynthesis on other organisms