EFFECT OF PLANT DENSITY AND SEEDING DATE ON EARLY- AND LATE-MATURING SUNFLOWER HYBRIDS

1989 ◽  
Vol 69 (4) ◽  
pp. 1251-1254 ◽  
Author(s):  
G. H. GUBBELS ◽  
W. DEDIO
Keyword(s):  
Helianthus Annuus ◽  
Plant Height ◽  
Oil Content ◽  
Field Experiments ◽  
Plant Density ◽  
Helianthus Annuus L ◽  
Seeding Date ◽  
Plant Densities

Field experiments were conducted in 1983, 1984 and 1986 to determine the response of Sun M 20 (early) and 894 (late) sunflower (Helianthus annuus L.) hybrids to three plant densities (30 000, 45 000 and 60 000 plants ha−1) at two seeding dates (18–24 May and 13–16 June). With increase in plant density, achene yields followed the same trends in each seeding date for both hybrids. Yields were similar at the 30 000 and 45 000 plant densities, but lower at the 60 000 density. Plant height and oil content of achenes increased while achene weight decreased with increase in plant density. Plant height was greater but achene weight, oil content and achene yield were lower in the late than the early seeding.Key words: Sunflower, Helianthus annuus L., plant density, seeding date

EFFECT OF PLANT DENSITY AND SOIL FERTILITY ON OILSEED SUNFLOWER GENOTYPES

1986 ◽  
Vol 66 (3) ◽  
pp. 521-527 ◽  
Author(s):  
G. H. GUBBELS ◽  
W. DEDIO
Keyword(s):  
Soil Fertility ◽  
Helianthus Annuus ◽  
Plant Height ◽  
Field Experiments ◽  
Plant Density ◽  
Helianthus Annuus L ◽  
Plant Densities ◽  
Oil Concentration ◽  
Growth Habits ◽  
Delayed Flowering

Field experiments were conducted in the 1979 to 1982 seasons to determine the response of sunflower (Helianthus annuus L.) genotypes with different growth habits to different plant densities at two levels of soil fertility in the Morden, Manitoba area. Treatments included hybrids and an open-pollinated cultivar, no fertilizer and 250 kg ha−1 of 27-14-0 and plant densities of 30 000, 45 000, 60 000 and 75 000 plants ha−1. Hybrids and open-pollinated cultivar responded similarly to the fertility and plant density levels. An increase in plant density did not affect yield, but slightly delayed flowering time, increased plant height, test weight and oil concentration and decreased achene weight. A plant density of about 45 000 plants ha−1 was required to ensure optimum yield.Key words: Sunflower, Helianthus annuus L., plant density, soil fertility

RESPONSE OF EARLY-MATURING SUNFLOWER HYBRIDS TO ROW SPACING AND PLANT DENSITY

1990 ◽  
Vol 70 (4) ◽  
pp. 1169-1171 ◽  
Author(s):  
G. H. GUBBELS ◽  
W. DEDIO
Keyword(s):  
Key Words ◽  
Helianthus Annuus ◽  
Plant Height ◽  
Oil Content ◽  
Plant Density ◽  
Growth Habit ◽  
Row Spacing ◽  
Normal Height ◽  
Early Maturing ◽  
Plant Densities

Two early-maturing sunflower hybrids, Sunwheat 101 and MRS 34, with shorter than normal height and a narrower growth habit were grown at 30- and 60-cm row spacings and three plant densities at each row spacing in the 1986 and 1987 seasons at Morden, Manitoba. There were no differences in achene yield or oil content between row spacings. Plant height and oil content of achenes increased with increase in plant density, while achene weight decreased. Achene yield of both hybrids increased as plant density increased from 55 000 to the 74 000 plants ha−1 density, then remained relatively constant to 148 000 plants ha−1.Key words: Oilseed sunflower, Helianthus annuus L., plant row spacing, plant density

scholarly journals GENETIC DIVERSITY IN NON-OILSEED SUNFLOWER (Helianthus annuus L.) GENOTYPES / DIVERSIDAD GENETICA DE GENOTIPOS NO OLEAGINOSOS DEL GIRASOL (Helianthus annuus L.) / DIVERSITÉ GÉNÉTIQUE DANS LES GÉNOTYPES DE TOURNESOL NON-OLÉAGINEUX (Helianthus annuus L.)

Helia ◽  
2001 ◽  
Vol 24 (34) ◽  
pp. 17-24
Author(s):  
K. Manjula ◽  
H.L. Nadaf ◽  
K. Giriraj
Keyword(s):  
Genetic Diversity ◽  
Protein Content ◽  
Helianthus Annuus ◽  
Plant Height ◽  
Genetic Divergence ◽  
Oil Content ◽  
Diversité Génétique ◽  
Helianthus Annuus L ◽  
Volume Weight ◽  
Seed Characteristics

SUMMARYGenetic diversity was assessed in 46 non-oilseed sunflower genotypes for 14 characters by adopting D2 analysis. Oil content and plant height exhibited maximum contributions towards genetic divergence. The genotypes were grouped into 11 clusters. The inter-cluster D2 values ranged from 288.17 to 3972.34. The contribution of oil content towards genetic divergence in the 46 genotypes was confirmed when D2 analysis was performed for seed characteristics such as test weight, volume weight, hull content, kernel recovery, oil and protein content.

EFFECT OF PLANT DENSITY ON THE AGRONOMIC PERFORMANCE OF SUNFLOWER ON DRYLAND

1984 ◽  
Vol 64 (3) ◽  
pp. 599-605 ◽  
Author(s):  
N. W. HOLT ◽  
S. J. CAMPBELL
Keyword(s):  
Helianthus Annuus ◽  
Seed Weight ◽  
Oil Content ◽  
Seed Oil ◽  
Plant Density ◽  
Agronomic Traits ◽  
Agronomic Performance ◽  
Head Diameter ◽  
Helianthus Annuus L ◽  
Days To Maturity

This study investigated the influence of plant density on several agronomic traits of four sunflower (Helianthus annuus L.) cultivars grown at Indian Head and Saskatoon, Saskatchewan in the semiarid prairies. At populations of 40 000–85 000 plants∙ha−1, plant density had no significant effect on seed yield. The increase in percentage oil content with increase in plant density (44.3–45.6%) was small but significant. As plant density was increased, days to flower, height and test weight increased while days to maturity, head diameter and average seed weight decreased. Cultivars × density interactions were generally not significant. Environment (five location-years) had a significant effect on all variables, and environments × cultivar interactions were significant for most of these. Results of this experiment indicated that testing of sunflower lines at several locations in the growing area would be necessary for best assessment but one plant density, suitable to that area, could be used.Key words: Sunflower, plant density, seed, oil, seed size, Helianthus annuus L.

Kochia (Kochia scoparia) Interference in Sunflower (Helianthus annuus)

1990 ◽  
Vol 4 (1) ◽  
pp. 52-56 ◽  
Author(s):  
Beverly R. Durgan ◽  
Alan G. Dexter ◽  
Stephen D. Miller
Keyword(s):  
Helianthus Annuus ◽  
Plant Height ◽  
Oil Content ◽  
Field Experiments ◽  
Yield Loss ◽  
Dry Weight ◽  
Kochia Scoparia

Field experiments were conducted in 1983 and 1984 at two locations to determine the influence of various densities and durations of kochia interference in sunflower. Sunflower achene yield and dry weight were reduced by all densities of kochia, averaged over locations and years. Season-long competition by kochia densities of 0.3, 1, 3, and 6 plants/m of row decreased sunflower achene yield 7, 10, 20, and 27%, respectively. Sunflower achene yield and sunflower dry weight decreased as weeks of kochia competition increased. Only 2 weeks of kochia competition after sunflower emergence decreased sunflower achene yield 6%. Sunflower achene yield loss increased as the duration of kochia competition increased. Sunflower 200 achene weight, oil content, and plant height were not influenced by various densities or durations of kochia competition.

EFFECT OF ORGANIC AND INORGANIC SOURCES OF NUTRIENTS APPLIED ALONE OR IN COMBINATION ON GROWTH AND YIELD OF SUNFLOWER (Helianthus annuus L.) / EFECTO DE FUENTES ORGANICAS E INORGANICAS DE SUSTANCIAS NUTRITIVAS APLICADAS EN PARTICULAR Y EN COMBINACIONES SOBRE EL CRECIMIENTO Y EL RENDIMIENTO DE GIRASOL (Helianthus annuus L.) / EFFET DES ENGRAIS DE SOURCE S ORGANIQUE ET INORGANIQUE ADMINISTRÉS ISOLÉMENT OU EN COMBINAISON SUR LA CROISSANCE ET LE RENDEMENT DU TOURNESOL (Helianthus annuus L.)

Helia ◽  
2001 ◽  
Vol 24 (34) ◽  
pp. 115-120
Author(s):  
G. Nanjundappa ◽  
B. Shivaraj ◽  
S. Janarjuna ◽  
S. Sridhara
Keyword(s):  
Helianthus Annuus ◽  
Oil Content ◽  
Seed Oil ◽  
Field Experiments ◽  
Farmyard Manure ◽  
Growth And Yield ◽  
Recommended Dose ◽  
Seed Oil Content ◽  
Helianthus Annuus L ◽  
Yield Parameters

SUMMARY Field experiments have been conducted to study the effect of organic and inorganic sources of nutrients applied alone or in combination on the growth and yield of sunflower. Application of a recommended dose of fertilizer (62.5:75:62.5 kg NPK ha-1) coupled with 10 t ha-1 of farmyard manure has recorded highest seed and stalk yields of sunflower. Growth and yield parameters were also favorably influenced by the application of the recommended dose of fertilizer coupled with farmyard manure. Seed oil content was not influenced by the application of organic or inorganic sources of nutrients.

scholarly journals ASPECTOS MORFOFISIOLÓGICOS DO GIRASSOL IRRIGADO POR GOTEJAMENTO NO SUBMÉDIO SÃO FRANCISCO

Irriga ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 66 ◽  
Author(s):  
Welson Lima Simões ◽  
Daniela Siqueira Coelho ◽  
Moisés Alves Souza ◽  
Marcos Antônio Drumond ◽  
Joston Simão Assis ◽  
...  
Keyword(s):  
Experimental Design ◽  
Gas Exchange ◽  
Helianthus Annuus ◽  
Plant Height ◽  
Oil Content ◽  
Irrigation System ◽  
Helianthus Annuus L ◽  
Weight Yield ◽  
Number Of Leaves ◽  
Irrigation Levels

ASPECTOS MORFOFISIOLÓGICOS DO GIRASSOL IRRIGADO POR GOTEJAMENTO NO SUBMÉDIO SÃO FRANCISCO WELSON LIMA SIMÕES1; DANIELA SIQUEIRA COELHO2; MOISÉS ALVES SOUZA3; MARCOS ANTÔNIO DRUMOND4; JOSTON SIMÃO ASSIS5 E JAIR ANDRADE LIMA6 1Eng. Agrônomo, Doutor, Embrapa Semiárido, Petrolina-PE, CEP 56302-970, email: [email protected]. Agrícola e Ambiental, Doutoranda, Universidade Federal Rural de Pernambuco, Recife-PE, CEP 52171-900, email:[email protected]ólogo, Mestre, Embrapa Semiárido, Petrolina-PE, CEP 56302-970, email: [email protected]. Florestal, Doutor, Embrapa Semiárido, Petrolina-PE, CEP 56302-970, email: [email protected]. Agrônomo, Doutor, Embrapa Semiárido, Petrolina-PE, CEP 56302-970, email: [email protected]ólogo, Universidade de Pernambuco, Petrolina-PE, CEP 56328-903, email: [email protected]  1 RESUMO O objetivo desse trabalho foi avaliar a influência de diferentes lâminas de irrigação e arranjos de gotejadores nas características morfofisiológicas de variedades de girassol. O delineamento experimental foi em blocos casualizados dispostos em esquema fatorial 2x2x4, considerando duas variedades de girassol (Hélio 251 e Hélio 360), dois arranjos das linhas de gotejo (fileiras simples e fileiras duplas) e quatro lâminas de irrigação (75, 90, 105 e 120% da ETc), com três repetições. Foram avaliados altura, diâmetro do caule, número de folhas, peso do capítulo, peso de mil aquênios, produtividade e respostas fisiológicas das plantas. A partir dos resultados obtidos, foi observado que, no geral, a lâmina correspondente a 100% da ETc proporcionou as melhores respostas para o cultivo das variedades de girassol Hélio 251 e Hélio 360. Considerando a não diferença significativa entre os arranjos das linhas de gotejadores, o de fileiras duplas torna-se o mais viável para o cultivo de girassol, tendo em vista sua maior economia na instalação do sistema de irrigação. O teor de óleo dos aquênios não é influenciado pela disponibilidade de água para as plantas de girassol.  Palavras-chave: Helianthus annuus L., produtividade, trocas gasosas, teor de óleo  SIMÕES, W. L; COELHO, D. S.; SOUZA, M. A.; DRUMOND, M. A.; ASSIS, J. S; LIMA, J. A.MORPHOPHYSIOLOGICAL ASPECTS OF SUNFLOWER IRRIGATION DRIP IN SUBMIDDLE OF THE SÃO FRANCISCO  2 ABSTRACT  The aim of this study was to evaluate the influence of different irrigation drip in single and double rows on morphological and physiological characteristics of sunflower varieties. The experimental design was randomized blocks in a factorial 2x2x4 considering two varieties (Hélio 251 e Hélio 360), two provisions of drip lines (single and double rows), four irrigation levels (75, 90, 105 and 120% of ETc) and three replications. At the end of the experiment, plant height, stem diameter, number of leaves, weight of the chapter, a thousand achenes weight, yield, and gas exchange. From the results obtained, it was observed that, in general, the blade corresponding to 100% of ETc provided better answers in the cultivation of sunflower varieties Hélio 251 e Hélio360. A irrigated by drip lines available in double rows is more feasible for sunflower cultivation in view of its greater savings in installation of the irrigation system and its effect is similar to that of single rows. The variety has 360 Helium oil content higher than 251 helium. keywords: Helianthus annuus L., productivity, gas exchange, oil content.

EFFECT OF PLANT DENSITY AND SOIL FERTILITY ON THE PERFORMANCE OF NONOIL SUNFLOWER

1986 ◽  
Vol 66 (3) ◽  
pp. 801-804
Author(s):  
G. H. GUBBELS ◽  
W. DEDIO
Keyword(s):  
Soil Fertility ◽  
Key Words ◽  
Helianthus Annuus ◽  
Plant Density ◽  
Helianthus Annuus L ◽  
Plant Densities

The nonoil sunflower (Helianthus annuus L.) cultivar Sundak was grown at four plant densities and two soil fertility levels for 3 yr in the Morden, Manitoba area. Fertilizer increased achene yield in 2 of the 3 yr and increased achene size in 1 of the 3 yr. Achene size and weight decreased with increase in plant density. Achene yield reached a maximum at approximately 30 000 plants ha−1.Key words: Nonoil sunflower, Helianthus annuus L., plant density, soil fertility

EFFECT OF PLANT DENSITY AND ROW SPACING ON AGRONOMIC PERFORMANCE AND ECONOMIC RETURNS OF NONOILSEED SUNFLOWER IN SOUTHEASTERN SASKATCHEWAN

1985 ◽  
Vol 65 (3) ◽  
pp. 501-509 ◽  
Author(s):  
N. W. HOLT ◽  
R. P. ZENTNER
Keyword(s):  
Helianthus Annuus ◽  
Seed Size ◽  
Seed Yield ◽  
Plant Density ◽  
Row Spacing ◽  
Agronomic Performance ◽  
Economic Returns ◽  
Helianthus Annuus L ◽  
Large Seed ◽  
Plant Densities

Years, locations and planting density are significant factors that influence the agronomic performance of Sundak nonoilseed sunflower (Helianthus annuus L.) in southeastern Saskatchewan. As plant densities of sunflower were increased from 37 500 to 75 000 plants/ha at Indian Head from 1975 to 1977, achene (seed) yield and test weight increased linearly with density while percentages of roasting and dehulling seed categories decreased. Row spacings of 30–90 cm affected plant height and seed yield and size, but absolute amounts were not large. Based on 1984 prices of four seed-size categories, highest gross economic returns were favored by the higher plant densities. In a second test at Indian Head and Oxbow in 1979 and Areola in 1980, a range of plant densities from 22 900 to 76 400 plants/ha did not significantly affect seed yield or gross economic returns. However, yield and returns tended to be greatest for 50 000-60 000 plants/ha. Percentages of large seed decreased as plant population increased. Because markets generally favor the large-seed size categories and the price differentials among seed size categories tend to increase, plant densities of 40 000 to 50 000 plants/ha might better be recommended to allow for years with greater price differentials.Key words: Nonoilseed sunflower, Helianthus annuus L., plant density, row spacing, seed size, economic returns

WILD OAT INTERFERENCE IN SUNFLOWER

1985 ◽  
Vol 65 (1) ◽  
pp. 219-222 ◽  
Author(s):  
W. O. CHUBB ◽  
G. H. FRIESEN
Keyword(s):  
Helianthus Annuus ◽  
Seed Yield ◽  
Critical Period ◽  
Oil Content ◽  
Field Experiments ◽  
Avena Fatua ◽  
Wild Oat ◽  
Helianthus Annuus L ◽  
Wild Oats ◽  
Postemergence Herbicides

In field experiments, sunflower (Helianthus annuus L. ’Hybrid 894’) recovered from initial effects of wild oat (Avena fatua L.) interference and yielded normally if the weed was removed within 4 wk after crop emergence and the crop was kept relatively free of wild oats thereafter until harvest. In widely spaced plantings, wild oats growing between-the-rows competed just as vigorously as in-the-row infestations. Selective postemergence herbicides did not always provide sufficient control of wild oats to prevent significant losses in sunflower yield.Key words: Competition, interference, seed yield, oil content, herbicides, critical period

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