Yield traits of sunflower (Helianthus annuus L.) hybrids according to the difference in their growth stages

2020 ◽  
Vol 53 (1) ◽  
Author(s):  
Ismail Demir
Keyword(s):  
Helianthus Annuus ◽  
Growth Stages ◽  
Yield Traits ◽  
Helianthus Annuus L ◽  
The Difference

Dwarf sunflower response to row spacing, stand reduction, and defoliation at different growth stages

2003 ◽  
Vol 83 (2) ◽  
pp. 319-326 ◽  
Author(s):  
B. L. Johnson
Keyword(s):  
Helianthus Annuus ◽  
Oil Content ◽  
Growth Stage ◽  
Total Yield ◽  
Reciprocal Relationship ◽  
Yield Response ◽  
Yield Reduction ◽  
Row Spacing ◽  
Growth Stages ◽  
Helianthus Annuus L

Growth compensation of dwarf sunflower (Helianthus annuus L.) hybrids to low initial stands, later stand losses, or plant defoliation has not been reported regarding replanting decisions and crop insurance yield loss assessment. Three experiments were conducted to study the affect of stand reduction, defoliation, and row spacing on dwarf sunflower yield and quality when grown in eastern North Dakota. Experiment 1 evaluated stand reduction (0, 25, 50 and 75%) applied at growth stages (V4, R1 and R6) in 15, 45 and 76 cm spaced rows. Row spacing interactions with stand reduction and growth stage were not significant for yield indicating growth stage and stand reduction effects on yield response were independent of row spacing. In exp. 2, significant growth stage (V4, V8, R1, R2, R3, R5 and R6) by stand reduction (0, 12, 25, 37, 50, 62 and 75%) interaction showed stand reduction at vegetative growth stages not influencing yield, but as maturity progressed yield reductions became greater with increased stand reduction. Achene weight increased with increasing stand reduction at vegetative and early reproductive stages. A reciprocal relationship was noted between achene weight and achene oil content where oil content decreased as achene weight increased. Interaction of growth stage (R1 and R6) and defoliation (0, 25, 50, 75 and 100%) in exp. 3 indicated greater reduction in yield, test weight, 1000-achene weight, and achene oil conte nt as defoliatin increased at growth stage R6. Yield compensating ability of dwarf sunflower is dependent on type and level of damage and growth stage of occurrence, with total yield reduction considering all effects. Key words: Sunflower, Helianthus annuus L., row spacing, stand reduction, defoliation

Performance comparison of single and three-way crosses in sunflower

1992 ◽  
Vol 72 (2) ◽  
pp. 431-434
Author(s):  
W. Dedio
Keyword(s):  
Helianthus Annuus ◽  
Oil Content ◽  
Performance Comparison ◽  
Helianthus Annuus L ◽  
Coefficient Of Variability ◽  
The Difference

Single and three-way crosses of sunflower (Helianthus annuus L.) hybrids were compared for yield and oil content by testing two groups of hybrids for 2 years. In the first group, the difference in yield and oil content between the two types was not significant, and in the second group the difference in yield was not significant. The oil content of the single crosses in the second group was 7 g kg−1 higher. The coefficient of variability for yield was similar in the two types of hybrids in both groups, indicating no difference in stability.Key words: Sunflower, Helianthus annuus L., single crosses, three-way crosses, oil content, achene yield

scholarly journals Effects of applied herbicides on crop productivity and on weed infestation in different growth stages of sunflower (Helianthus annuus L.)

Helia ◽  
2011 ◽  
Vol 34 (54) ◽  
pp. 27-37 ◽  
Author(s):  
M. Simic ◽  
V. Dragicevic ◽  
S. Knezevic ◽  
M. Radosavljevic ◽  
Z. Dolijanovic ◽  
...  
Keyword(s):  
Helianthus Annuus ◽  
Crop Productivity ◽  
Growth Stages ◽  
Helianthus Annuus L ◽  
Weed Infestation ◽  
Different Growth Stages

DESENVOLVIMENTO E PRODUTIVIDADE DO GIRASSOL SOB LÂMINAS DE IRRIGAÇÃO EM SEMEADURA DIRETA NA REGIÃO DO ARENITO CAIUÁ, ESTADO DO PARANÁ

Irriga ◽  
2010 ◽  
Vol 15 (4) ◽  
pp. 373-385 ◽  
Author(s):  
Eder Pereira Gomes ◽  
Marizângela Rizzatti Ávila ◽  
Max Emerson Rickli ◽  
Fabiano Petri ◽  
Gregory Fedri
Keyword(s):  
Helianthus Annuus ◽  
Yield Components ◽  
Block Design ◽  
Irrigation Management ◽  
Growth And Yield ◽  
Water Retention Capacity ◽  
Growth Stages ◽  
No Tillage ◽  
Helianthus Annuus L ◽  
Crop Coefficients

O girassol é uma planta que se adapta em diversas condições edafoclimáticas, porém, as necessidades hídricas, assim como os coeficientes de cultura nos diferentes estádios fenológicos, ainda não estão perfeitamente definidas. Na região do Arenito Caiuá, Noroeste do Estado do Paraná, por possuir solo extremamente arenoso, portanto com baixa capacidade de retenção hídrica, torna-se imprescindível o cultivo de culturas anuais sob a técnica de semeadura direta. Com objetivo de estabelecer um manejo adequado de irrigação suplementar para a cultura do girassol nesta condição, valores de coeficiente de cultura foram propostos em cinco fases fenológicas. Utilizou-se um delineamento experimental de blocos casualizados com três repetições e cinco tratamentos, sendo um sem irrigação e quatro com lâminas de irrigação embasadas na adoção de diferentes coeficientes de cultura.  Ao final de cada fase foram medidas as seguintes componentes de produção: massa seca, diâmetro de capítulo, diâmetro de caule e altura de planta. A maioria das componentes respondeu de maneira linear, independente da fase analisada. Não houve baixa produtividade da cultura do girassol com ausência de irrigação, igual a 2271 kg ha-1, no entanto a maior produtividade, 3063 kg ha-1, foi alcançada por meio da irrigação que utilizou coeficientes de cultura iguais 0,4, 0,8, 1,2, 0,8 e 0,4, nas fases 1,2,3,4 e 5, respectivamente.   Palavras Chave: coeficiente de cultura, componentes de produção, irrigação suplementar, solo arenoso, Helianthus annuus L.     SUNFLOWER GROWTH AND YIELD UNDER IRRIGAGATION LEVELS IN NO-TILLAGE SYSTEM IN ARENITO CAIUÁ REGION - PARANÁ STATE.     2 ABSTRACT   The sunflower crop adapts various soil and climate conditions, however, the water requirements and the crop coefficients in different growth stages are not yet well defined.In Arenito Caiuá, Northwest of Parana State, because the soil is extremely sandy with low water retention capacity, there is a need for annual crops cultivation under no-tillage technique. In order to establish a proper supplemental irrigation management for sunflower cultivation in this condition, crop coefficient values were proposed in five phases of development. A randomized block design was used with three replications and five treatments, one without  and four irrigation depths based in the adoption of different crop coefficients. At the end of each phasethe following yield components were measured: dry matter, capitulum and stem diameter, and plant height. Most components responded in a linearly, independent of the phase analyzed. There wasn’t sunflower low yield without irrigation equal to 2271 kg ha-1, however the highest yield 3063 kg ha-1 was obtained by irrigation which used crop coefficients equal to 0.4, 0.8, 1.2, 0.8 and 0.4 in phases 1,2,3,4 and 5, respectively.   Key-words: crop coefficients, yield components, irrigation, soil, Helianthus annuus L.

Responses of sunflower (Helianthus annuus L.) to full and limited irrigation at different growth stages

2004 ◽  
Vol 87 (2-3) ◽  
pp. 167-178 ◽  
Author(s):  
A.T. Göksoy ◽  
A.O. Demir ◽  
Z.M. Turan ◽  
N. Dağüstü
Keyword(s):  
Helianthus Annuus ◽  
Growth Stages ◽  
Helianthus Annuus L ◽  
Different Growth Stages
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