Effect of Planting Date on Sunflower Yield, Oil, and Plant Characteristics<sup>1</sup>

Johnson, B. J.; Jellum, M. D.

doi:10.2134/agronj1972.00021962006400060011x

Cited by 25 publications

(16 citation statements)

References 3 publications

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“…A decrease in oil concentration in late-planted sunflower was reported by UNGER (1980) in an earlier study. In contrast, ANDERSON et al (1978) and JOHNSON and JELLUM (1972) observed that oil concentration was not affected by planting date.…”

Section: Sources Of Variationmentioning

confidence: 85%

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Effect of Planting Date on the Growth and Yield of Irrigated Sunflower (Helianthus annuus)

Esechie

1995

J Agronomy Crop Science

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The effect of planting date on the growth and yield of irrigated sunflower was investigated in 1992 and 1993. Two sunflower hybrids, Islero and Upsol‐veraflor, were sown at three different dates (3 October, 4 November, 2 December 1992 and 5 October, 6 November, 4 December 1993) in Sultan Qaboos University Agricultural Experiment Station on the Batinah Coast of Oman in a desert climate. Sunflower planted in December emerged later, flowered later and matured later than that planted in October or November. Severity of stalk lodging was closely related to the extent of stem weevil infestation, which was more serious in the early planted sunflower. Sclerotina head rot was also most severe in the October plantings and least severe in the December plantings. Head diameter, number of seeds per head and percentage of large seeds increased with delay in planting date. Seed yield and oil yield were highest in the December planted sunflower but oil concentration was not affected by the planting date. Based on these results, a December planting date was recommended for the Batinah Coast of Oman and other areas with similar climatic conditions.

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Section: Sources Of Variationmentioning

confidence: 85%

“…In North Dakota under dryland conditions, ALESSI et al (1977) recommended planting sunflower before mid-June for high seed yield and oil concentration. JOHNSON and JELLUM (1972) found that seed yield and oil concentration were highest when sunflower was planted between mid-March and April.…”

Section: Introductionmentioning

confidence: 99%

Effect of Planting Date on the Growth and Yield of Irrigated Sunflower (Helianthus annuus)

Esechie

1995

J Agronomy Crop Science

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“…Downes (1974) and Harris et al (1978) showed that oil percent decreased as temperature increased. In contrast, Johnson and Jellum (1972) and Unger (1980) found that the oil percent of seed from late-planted sunflower maturing during cooler weather was lower than from earlier-planted sunflower maturing during warmer weather. These different responses may have been due to temperature effects at specific developmental stages or to factors other than temperature.…”

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confidence: 83%

Planting Date Effects on Sunflower Head and Seed Development¹

Unger¹,

Thompson

1982

Agronomy Journal

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The effects of environmental conditions during sunflower (Helianthus annuus L.) seed development and maturation on the final oil percent of seed and composition of the oil have been studied extensively but little is known about the sequential changes that occur in seed and oil during seed development and maturation. A better understanding of these changes could lead to improved management of sunflower for seed and oil production. The objective of this study was to determine the influence of planting date on development and maturation of sunflower head and seed. Sunflower was planted in about 2‐week intervals from 23 Mar. to 1 Aug. 1977 in field plots on Pullman clay loam (fine, mixed, thermic Torrertic Paleustolls). The experiment had a randomized block design with three replications. Plants that were at the same stage of development were marked at the ray flower stage. After anthesis, head samples were collected two or three tunes each week for about 30 days to determine head weight and diameter; seed dry matter percent, weight, and oil percent; and oleic and linoleic acid concentration of the oil. Separate seed samples were obtained from the outer, middle, and inner sections of the heads. Planting date, sampling date, and head position, as well as the interactions of these variables, significantly affected all dependent variables. Head diameter and fresh weight initially increased as the sunflower developed, then decreased due to head shrinkage and drying as the sunflower matured. Seed dry matter percent increased from the first to last sampling, but not at the same rate for all planting dates. Trendsfor seed weight were similar to those for dry matter. Total oil percent of seed increased from the first to the seventh sampling after which the differences were not significant. Seed from late plantings generally had a low oil percent, but seed from the ninth planting had an unexplained high oil percent. Oleic and linoleic acid concentrations of the oil decreased and increased, respectively, for later plantings. These trends also occurred with later samplings of sunflower planted on a given date. Based on multiple regressions, air temperature significantly influenced changes per day in seed oil percent, but not the oleic and linoleic acid concentration of the oil, during the intervals between samplings. During these intervals, changes in oleic and linoleic acid concentration of the oil were significantly influenced by total solar radiation and day length.

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“…In short, different sowing times might expose the crop to different environmental conditions during grain filling and oil synthesis, resulting in a possible alteration in yield and quality attributes (Connor and Sadras 1992). Several studies have demonstrated changes in sunflower oil concentrations with different sowing times (Johnson and Jellum 1972;Unger 1980;Beard and Geng 1982;Andrade 1995;Bange et al 1997).…”

mentioning

confidence: 99%

Yield and quality response of autumn-planted sunflower (Helianthus annuus L.) to sowing dates and planting patterns

Saleem¹,

L.²,

Malik³

et al. 2008

Can. J. Plant Sci.

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Sowing time and sowing methods are often used to overcome environmental constraints on crop production. Information on the effect of these agronomic techniques on sunflower (Helianthus annuus L.) oil quality is, however, scarce. A field study was conducted to evaluate the effect of sowing dates and planting patterns, and their interaction, on seed yield and oil quality of hybrid sunflower. Sunflower hybrid Hysun-33 was sown at four dates beginning with the first week of August with fortnightly intervals under three planting patterns, viz., flat sowing (60 cm apart lines), ridge sowing (60 cm apart ridges) and bed sowing (90/30 cm) for 2 yr (2002 and 2003). The performance of the August sowing dates was significantly better with respect to yield and yield components than the September-sown crop. Among the three sowing dates in August, there was variable performance of the crop in the 2-yr study. On average, the sowing of sunflower from mid-August to the last week of August yielded better than early August sowing dates. The evaluation of quality parameters revealed greater content of achene oil in the September-sown crop followed by the crop sown in the last week of August. Delayed sowing lowered oleic acid content, but increased stearic and linoleic acid levels. Planting pattern treatments affected head diameter, achenes per head, 1000-achene weight and achene yield. Conclusively, sunflower sown on ridges during the second fortnight of August encountered favourable environmental conditions and gave significantly higher economic yield. Key words: Helianthus annuus , plantingg eometry, plantingpatterns, quality, sowingdates, sunflower yield

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Effect of Planting Date on Sunflower Yield, Oil, and Plant Characteristics¹

Cited by 25 publications

References 3 publications

Effect of Planting Date on the Growth and Yield of Irrigated Sunflower (Helianthus annuus)

Effect of Planting Date on the Growth and Yield of Irrigated Sunflower (Helianthus annuus)

Planting Date Effects on Sunflower Head and Seed Development¹

Yield and quality response of autumn-planted sunflower (Helianthus annuus L.) to sowing dates and planting patterns

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Effect of Planting Date on Sunflower Yield, Oil, and Plant Characteristics1

Cited by 25 publications

References 3 publications

Effect of Planting Date on the Growth and Yield of Irrigated Sunflower (Helianthus annuus)

Effect of Planting Date on the Growth and Yield of Irrigated Sunflower (Helianthus annuus)

Planting Date Effects on Sunflower Head and Seed Development1

Yield and quality response of autumn-planted sunflower (Helianthus annuus L.) to sowing dates and planting patterns

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Effect of Planting Date on Sunflower Yield, Oil, and Plant Characteristics¹

Planting Date Effects on Sunflower Head and Seed Development¹