Nitrogen nutrition of sunflower (Helianthus annuus L.): Yield components, the timing of their establishment and seed characteristics in response to nitrogen supply

Steer, B. T.; Hocking, P. J.; Kortt, Alexander A.; Roxburgh, C. M.

doi:10.1016/0378-4290(84)90028-5

Cited by 74 publications

(26 citation statements)

References 10 publications

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“…Nitrogen deficiency decreased spikelet number and delayed time of double ridge and terminal spikelet (Longnecker et al 1993). Changing nitrogen supply levels at the end of floret initiation and at anthesis showed (Steer et al 1984) that seed number was determined by nitrogen supply before floret initiation (Whingwiri and Stern 1982). In agreement with the result of Whingwiri and stern (1982), the present results showed that high N slightly increased spike dry weight, N contents though not significantly, but did not affect the duration of spikelet initiation and time of spike development.…”

Section: Nitrogen Application At Post Anthesis Stage and Yield Componsupporting

confidence: 81%

Yield Response of Uniculm Wheat (Triticum aestivum L.) to Early and Late Application of Nitrogen: Flag Leaf Development and Senescence

Kumari¹

2011

JAS

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Nitrogen (N) supply increased flag leaf area by increasing cell number. N promoted initiation and development of floret primordia. N availability upto ear emergence affected fertile floret number more than spikelet number and increased the number of grains. Late application of nitrogen at 5 days after anthesis increased percentage nitrogen in grains, grain weight and grain number due to its effect on ability of floret to set grain. Larger number of florets and grains provided sink not only for carbon but also for nitrogen accumulation with high nitrogen availability. The accumulation of grain protein depended on the accumulation and partitioning of reduced N accumulated during the vegetative stage of growth and the relative contributions of nitrate assimilation and N redistribution during grain development in low as well as high nitrogen supply. Flag leaf of 'Gigas' wheat retained the ability to synthesize RuBPCO on induction of nitrate reductase by substrate supply at post anthesis stage. The reductions in proteolytic enzymes were coincident with loss of Chl, total soluble protein and nitrate reductase activity from the flag leaves.

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Section: Nitrogen Application At Post Anthesis Stage and Yield Componsupporting

confidence: 81%

Yield Response of Uniculm Wheat (Triticum aestivum L.) to Early and Late Application of Nitrogen: Flag Leaf Development and Senescence

Kumari¹

2011

JAS

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“…High nitrogen supply promoting both leaf area and iSr could thus be expected to increase grain oil concentration. However, excess of nitrogen can reduce sunflower oil concentration, mainly through an increase in protein concentration with no increase in biomass (Steer et al, 1984, and references therein). Zheljazkov et al (2008Zheljazkov et al ( , 2009) observed that grain oil concentration of different sunflower hybrids decreased with increased nitrogen supply, but grain oil yield was unaffected due to higher total grain dry mass yield.…”

Section: Fig 171mentioning

confidence: 98%

Improving grain quality: ecophysiological and modeling tools to develop management and breeding strategies

Aguirrezábal¹,

Martre²,

Irujo³

et al. 2015

Crop Physiology

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“…However, excess N can reduce sunflower oil concentration, mainly due to an increase in protein concentration with no increase in biomass (Steer et al, 1984). Zheljazkov et al (2008Zheljazkov et al ( , 2009 observed that grain oil concentration of different sunflower hybrids was unaffected due to higher total grain dry mass yield.…”

Section: Correlation Among Crude Fat Content Protein and Fatty Acidmentioning

confidence: 99%

The Quality of Sunflower Seed Oil Changes in Response to Nitrogen Fertilizer

Shi

Zhu

et al. 2017

Agronomy Journal

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Core Ideas Topdressing N increase the content of crude fat and linoleic acid in sunflower seeds. More topdressing N reduces the content of protein, oleic acid, and palmitic acid. Crude fat content significantly correlated with protein content in sunflower seeds. Sunflower (Helianthus annuus L.) has emerged as a very important crop in China due to the economic value of vegetable oil production. A 2‐yr field experiment was conducted in 2013 and 2014 to determine the effect of different N fertilizer application levels on the oil quality of a sunflower hybrid Kang Di T562 grown in the Hetao irrigation district, a sub‐arid region in China. The effects of N fertilizer were evaluated for three characteristics of oil from sunflower seeds: crude fat content (CFC), protein content, and fatty acid composition. The results showed that N fertilizer application had a significant effect on CFC, protein content, and fatty acid composition (oleic acid, linoleic acid, palmitic acid, stearic acid). When basic N fertilizer (68 kg ha−1) was used, subsequent topdressing N applications at the end of budding promoted the synthesis of protein, palmitic acid, and oleic acid in the oil of sunflower seeds, but decreased the CFC and linoleic acid content. There was a significant negative correlation between CFC and protein content (P ≤ 0.05) and between oleic acid and linoleic acid (P ≤ 0.01) in oil from sunflower seeds. There were positive and negative correlations among the main quality indices of sunflower seed. To increase the content of crude fat and linoleic acid in the oil of sunflower seeds, topdressing should not be used, or its use should be reduced, although this could reduce the content of protein, oleic acid, and palmitic acid.

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Nitrogen nutrition of sunflower (Helianthus annuus L.): Yield components, the timing of their establishment and seed characteristics in response to nitrogen supply

Cited by 74 publications

References 10 publications

Yield Response of Uniculm Wheat (Triticum aestivum L.) to Early and Late Application of Nitrogen: Flag Leaf Development and Senescence

Yield Response of Uniculm Wheat (Triticum aestivum L.) to Early and Late Application of Nitrogen: Flag Leaf Development and Senescence

Improving grain quality: ecophysiological and modeling tools to develop management and breeding strategies

The Quality of Sunflower Seed Oil Changes in Response to Nitrogen Fertilizer

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