Nitrogen Nutrition and Planting Density Effects on Sunflower Growth and Yield: A Review

Ali, Amjed; Ahmad, Ashfaq; Khaliq, Tasneem; Ali, Anser; Aḥmad, Muḥammad Musḥtaq

doi:10.3923/pjn.2013.1024.1035

Cited by 18 publications

(17 citation statements)

References 79 publications

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“…There is also a decrease in the weight of 1000 seeds and seeds number from the anthode [34]. However, with plant density increasing, competition for light between plants increases, which leads to a decrease in vegetative and reproductive plasticity of the plant [35], while lower plant density leads to reduced light absorption by plants what leads to a reduction in yield per unit area [36] [37] [38]. Theoretical studies and practical experience have shown that high yields per unit area are usually associated with low plant competitiveness due to reduced anthode diameter, plant biomass, weight of 1000 seeds, seed yield per plant, unsaturated fatty acids [39] [40].…”

Section: Morphological Features Of Plants Sunflower Yield Depending On Plants' Densitymentioning

confidence: 99%

Morphological Features of Plants and Yield of Sunflower Hybrids Cultivated in the Northern Part of the Forest-Steppe of Ukraine

Kalenska¹,

Ryzhenko²,

Novytska³

et al. 2020

AJPS

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In Ukraine, a sunflower is the main oil crop from which more than 90% of vegetable fats are produced. An increase in production is due to the expansion of cultivation area, which necessitates research on sunflower hybrids adaptability in the northern regions of Ukraine, where in recent decades, there has been a significant change of weather conditions and which may be favorable for its cultivation. The research was carried out in the Northern part of the Forest-Steppe of Ukraine on light loam chernozems. Reaction to growing conditions of four hybrids was studied by establishing the stability and plasticity of hybrids in terms of yield formation due to changes in morphological characteristics of plants. Yield potential realization is high enough, which is provided by sufficient amounts of positive, active, effective temperatures and precipitation. Calculation of the coefficients of plasticity and stability allows identifying stable sunflower hybrids, hybrids with a high level of plasticity, and recommending them to production. The yield of early-maturing hybrid Ukrainskyi F1 increases rectilinearly with plant density increasing (r = 0.977 -0.998), while hybrids P63LL06 (r = 0.651 -0.882); NK Ferti (r = 0.589 -0.846), and NK Brio (r = 0.689 -0.804) form a higher yield at standing densities up to 60 thousand plants per hectare, and with further thickening, the yield decreases. With the thickening of sowings, the height of all hybrids plants increases (r = 0.97 -0.99), and there is a decrease in the number of seeds per anthode, and the weight of 1000 seeds. Sunflower hybrids can be divided into the groups according to the peculiarities of yield formation due to morphological features: 1) yield increases only due to sowings' thickening-Ukrainskyi F1; 2) combined efficiency-increasing sowings' density to 60 thousand plants/ha and generative organs formation-NCKBrio; 3

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Section: Morphological Features Of Plants Sunflower Yield Depending On Plants' Densitymentioning

confidence: 99%

Morphological Features of Plants and Yield of Sunflower Hybrids Cultivated in the Northern Part of the Forest-Steppe of Ukraine

Kalenska¹,

Ryzhenko²,

Novytska³

et al. 2020

AJPS

View full text Add to dashboard Cite

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“…Ali et al . (2013) conducted study to investigate the effect of microelements on the yield and yield components of sunflower at different levels of plant density. They concluded that increasing plant density resulted in increased sunflower seed yield through increasing the number of heads per square metre.…”

Section: Discussionmentioning

confidence: 99%

“…In other words, the only factor that can affect the number of sunflower heads per unit area is plant density, and factors such as genotype or moisture stress do not have a significant effect on the number of heads per unit area. Ali et al (2013) conducted study to investigate the effect of microelements on the yield and yield components of sunflower at different levels of plant density. They concluded that increasing plant density resulted in increased sunflower seed yield through increasing the number of heads per square metre.…”

Section: Discussionmentioning

confidence: 99%

Effect of drought stress on agro-morphological traits in sunflower (Helianthus annuusL.) genotypes and identification of informative ISSR markers

darbani

Mehrabi

Pordad

et al. 2020

Plant Genet. Resour.

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The aims of the current study were to investigate the effect of drought stress on phenological and morphological traits of sunflower genotypes and to determine the important traits for identifying drought-tolerant and drought-sensitive cultivars. For this purpose, a lattice square-design experiment was conducted with 64 sunflower genotypes in an 8 × 8 pattern with two replications under non-stress and moisture-stress conditions (irrigation holding at the flowering stage) during 2 years 2016 and 2017. Measured and recorded traits were included the some phenological and morphological traits seeds. Sil-96 genotype showed the highest yield under both non-stress and moisture-stress conditions. Among the morphological traits, the head and stem diameters were highly significant to determine the final yield. In comparing the genotypes, it was concluded that the number of seeds per head was the most influential component affecting the yield. Furthermore, 1000-seed weight was the most important factor affecting grain yield under moisture-stress conditions. The result of association analysis study shows that 45 of inter-simple sequence repeat markers in a general linear model are associated with yield and yield component traits and 23 of them were verified in a mixed linear model (MLM) association approach. Also, 32 markers were informative for morpho-physiological traits and 24 of them verified using the MLM. Finally, 19 informative markers were identified for phenological traits and 10 of them were verified by the MLM.

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“…El rendimiento del girasol está condicionado principalmente por la variedad, sin embargo, el uso de fertilizantes es sin duda alguna un eslabón clave (Li et al, 2017). Es bien conocido que el rendimiento en campo del girasol está condicionado principalmente por la disponibilidad de nitrógeno (Ali et al, 2014;Awais et al, 2017).…”

Section: Introductionunclassified

Desarrollo del girasol (Helianthus annuus L.) con aplicación de codornaza bajo distintas láminas de riego

Palacio-Román

Agudelo-Escobar

2020

Cien. Agri.

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Actualmente se están buscando alternativas para reducir los costos que implican los químicos en la agricultura. La aplicación de materia orgánica se propone no solo como alternativa para mejorar las propiedades químicas del suelo sino también como un medio para favorecer sus propiedades físicas y la capacidad del mismo para retener humedad. Un insumo poco utilizado en la agricultura son los excrementos de codornices o codornaza, que actualmente por su falta de uso están siendo desperdiciados transformándose de esta manera en un importante contaminante rural. El objetivo de este trabajo fue evaluar el efecto de dos dosis (6250 y 12500 kg/ha) de codornaza y dos láminas de riego (100 mL y 200 mL) en el crecimiento y desarrollo de Helianthus annuus L. a través de variables alométricas como la altura de las plantas, el número de hojas, numero de botones florales y plantas florecidas, variables evaluadas cada ocho días. El experimento fue establecido en la ciudad de Medellín, región caracterizada por su vocación floricultora, mientras que la codornaza fue obtenida de una granja coturnicultora en el municipio de Marinilla, ubicado al occidente de Colombia sobre la rama central de la cordillera de los Andes. Los tratamientos no mostraron diferencias significativas para las variables relacionadas a la fenología de las plantas, sin embargo, mostraron una marcada tendencia para el tratamiento de 6250 kg/ha en la mejora de las variables vegetativas y en el peso de las semillas, además, los niveles de codornaza utilizados en el estudio no presentaron efectos de restricción nutricional en las plantas para ninguna de las variables medidas.

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Nitrogen Nutrition and Planting Density Effects on Sunflower Growth and Yield: A Review

Cited by 18 publications

References 79 publications

Morphological Features of Plants and Yield of Sunflower Hybrids Cultivated in the Northern Part of the Forest-Steppe of Ukraine

Morphological Features of Plants and Yield of Sunflower Hybrids Cultivated in the Northern Part of the Forest-Steppe of Ukraine

Effect of drought stress on agro-morphological traits in sunflower (Helianthus annuusL.) genotypes and identification of informative ISSR markers

Desarrollo del girasol (Helianthus annuus L.) con aplicación de codornaza bajo distintas láminas de riego

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