Some Effects of Planting Pattern on Yield, Per Cent Oil and Per Cent Protein in Mandarin (Ottawa) Soybeans

Donovan, L. S.; Dimmock, F.; Carson, R. B.

doi:10.4141/cjps63-023

Cited by 25 publications

(16 citation statements)

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“…Debranching at low densities was also associated with premature senescence of leaves and desiccation of immature pods, suggesting that branch removal need not have an exclusively simple nutritional basis. High canopy density reduced oil content, and seeds borne on primary racemes had lower oil levels than those on axillary branches.Reports on several crops indicate that spacing affects the percentage of oil in harvested seed (Dillman and Brinsmade, 1938;Hinson and Hanson, 1962;Donovan et al, 1963). In preliminary experiments forming part of the present study it was also observed that seed borne on secondary racemes could develop a higher oil content than those on the primaries, though the increased oil levels were generally found only when plants were grown in dense stands.…”

supporting

confidence: 58%

“…Reports on several crops indicate that spacing affects the percentage of oil in harvested seed (Dillman and Brinsmade, 1938;Hinson and Hanson, 1962;Donovan et al, 1963). In preliminary experiments forming part of the present study it was also observed that seed borne on secondary racemes could develop a higher oil content than those on the primaries, though the increased oil levels were generally found only when plants were grown in dense stands.…”

supporting

confidence: 58%

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Effects of Plant and Canopy Density on Seed Yield and Oil Content in White Lupin (Lupinus albus)

McGibbon

Williams

1980

Ex. Agric.

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High plant populations caused a reduction in pod set and consequently in seed yield. Removal of axillary branches reduced the average weight of seed and percentage seed oil on primary racemes, indicating transport of photosynthate from branch leaves to storage sites in pods on primary racemes. Debranching at low densities was also associated with premature senescence of leaves and desiccation of immature pods, suggesting that branch removal need not have an exclusively simple nutritional basis. High canopy density reduced oil content, and seeds borne on primary racemes had lower oil levels than those on axillary branches.Reports on several crops indicate that spacing affects the percentage of oil in harvested seed (Dillman and Brinsmade, 1938;Hinson and Hanson, 1962;Donovan et al., 1963). In preliminary experiments forming part of the present study it was also observed that seed borne on secondary racemes could develop a higher oil content than those on the primaries, though the increased oil levels were generally found only when plants were grown in dense stands. Furthermore it has been established (McGibbon, 1978) that a reduction in light intensity reduced seed oil content. The present experiments were planned to study further the relation between plant population, canopy density and pod shading on yield of seed and on oil content. MATERIALS AND METHODSThe work was conducted at the experimental field unit of the Plant Science Laboratories, University of Reading. Experiments 1 and 2 were established in field plots, Expt 3 was conducted on pot-grown plants in the open and Expt 4 on pot-grown plants in an unheated glasshouse. The material was grown and recorded during the 1976 and 1977 growing seasons. The techniques used for determining oil content in seeds have already been described by McGibbon (1978). Experiment 1. Three populations were sown at 6, 25 and 100 seeds per m 2 according to a randomized block design in the field. Plots at the highest densities were divided on day 45, after anthesis of the first flower on the primary raceme, into two sub-plots in which plants (a) were allowed to develop normally to maturity, or (b) had the axillary branches held away from the plant 28.

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supporting

confidence: 58%

supporting

confidence: 58%

Effects of Plant and Canopy Density on Seed Yield and Oil Content in White Lupin (Lupinus albus)

McGibbon

Williams

1980

Ex. Agric.

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“…Crude protein and oil concentrations, which are negatively correlated, were previously reported to be affected by a range of environmental conditions and agronomic practices, including row spacing, weed control, and planting dates; reports have, however, been conflicting and differences were often minor (Donovan et al 1963;Rose 1988;Kane et al 1997;Galal 2004). …”

Section: Crude Protein and Oil Concentrationsmentioning

confidence: 99%

Seeding date, row spacing, and weed effects on soybean isoflavone concentrations and other seed characteristics

Al-Tawaha¹,

Séguin²

2006

Can. J. Plant Sci.

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20-, 40-and 60-cm) and weeds (presence or absence) on soybean isoflavone concentrations and isoflavone yield. Total and individual isoflavone concentrations were determined by HPLC. Seed yield, and oil and crude protein (CP) concentrations were concurrently determined. Year, seeding date, and weeds affected total and individual isoflavone concentrations, while row spacing had no effect. Total isoflavone concentration was 84% greater in 2003 than 2004. Seeding in mid-June increased isoflavone concentration by 38%, compared with seeding in May. The presence of weeds increased total isoflavone concentration by 9%. Year, row spacing, and weeds significantly affected seed yields. Seed yields were greatest in 2004, at 20-or 40-cm row spacing, and in the absence of weeds. Seeding date affected CP and oil concentrations. Greater CP concentration was observed with earlier seeding, the reverse was observed for oil. Weeds also affected CP and oil concentrations: higher CP and oil concentrations were observed in weedy and weed-free plots, respectively. Total isoflavone yield was affected by all factors evaluated. Isoflavone yield was greater in 2003 than 2004, with mid-June rather than late May seeding, when seeded at row spacing of 20-or 40-than 60-cm, and without weeds. Finally, negative correlations were observed between isoflavone concentrations and CP concentration and seed yield. It thus seems that certain agronomic practices may need to be tailored specifically to isoflavone production if concentrations in soybean are to be maximized. The negative correlations observed between isoflavone concentrations and other important seed characteristics warrant further research. La concentration de PB est plus élevée quand on sème plus tôt, l'inverse étant vrai pour l'huile. Les mauvaises herbes influent aussi sur la concentration de PB et d'huile, la première étant plus élevée dans les parcelles avec adventices et la seconde dans celles sans mauvaises herbes. Le rendement total en isoflavones subit l'influence de tous les paramètres examinés. Le rendement en isoflavones était plus élevé en 2003 qu'en 2004, avec les semis à la mi-juin plutôt qu'à la fin de mai, à un écartement de 20 ou de 40 cm plutôt que de 60 et dans les parcelles sans mauvaises herbes. Enfin, la concentration d'isoflavones présente une correlation négative avec le rendement grainier et celle de PB. Il semble donc qu'on devrait adapter certaines pratiques agricoles pour optimiser la production d'isoflavones par le soja. Les corrélations négatives observées entre la concentration d'isoflavones et d'autres caractéristiques importantes de la graine justifient la tenue d'autres recherches.

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“…Donovan et al (1963) Cooper (1977) and Wax et al (1977), who demonstrated higher yields in narrow rows (( 25 cm) than in wide rows (> 50 cm) in central Illinois. Wiggans (1939) According to Willey and Heath (1969) plant population should not be defined in terms of density alone, but also in terms of rectangularity or the spatial arrangement of 228 CANADIAN JOURNAL OF PLANT SCIENCE the plants.…”

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confidence: 94%

The Effect of Different Row Spacings and Plant Arrangements on Soybeans

Safo-Kantanka¹,

Lawson²

1980

Can. J. Plant Sci.

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Two short-season soybean (Glycine max (L.) Merrill) cultivars, Altona and Clay, were tested in narrow rows (10, 15, 20 and 30 cm), and at four rectangularities (1:1, 1:2, 1:3, and 1:4) giving plant densities that ranged from 11 000 to 4 000 000 plants per hectare. Significant yield differences were demonstrated by narrowing row width, but not by changing rectangularity. In a second experiment, the same cultivars were grown in rows 15, 30, 45, and 60 cm apart, but with the density held constant at 670 000 plants/ha. This resulted in respective rectangularities of 1:1.5, 1:6, 1:13.6 and 1:24. Neither seed yield nor its components showed any significant response to row spacing in the second experiment.

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Some Effects of Planting Pattern on Yield, Per Cent Oil and Per Cent Protein in Mandarin (Ottawa) Soybeans

Cited by 25 publications

References 1 publication

Effects of Plant and Canopy Density on Seed Yield and Oil Content in White Lupin (Lupinus albus)

Effects of Plant and Canopy Density on Seed Yield and Oil Content in White Lupin (Lupinus albus)

Seeding date, row spacing, and weed effects on soybean isoflavone concentrations and other seed characteristics

The Effect of Different Row Spacings and Plant Arrangements on Soybeans

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