Cultivation
Helianthus annuus L.
Irrigation is a key factor in the intensification of sunflower cultivation, capable of increasing yields by 1.5–2 times. The crop's efficiency under irrigation is due to maintaining soil moisture at 70–80% of field capacity (FC) during critical growth stages.
In the reference 24 varieties crop Sunflower, where this is mentioned in the description.
The critical periods for water consumption in sunflowers are the stages of early budding, flowering, and seed filling. Moisture deficiency during the budding period and the onset of flowering, when the head diameter reaches 1.9–2.5 cm, can lead to losses of up to 50% of the yield. To optimize growth, it is necessary to maintain soil moisture in the 100 cm calculated layer at 70–80% of field capacity.
Despite the root system's ability to penetrate to a depth of 1.5–2 meters and a high level of drought tolerance, the crop consumes moisture intensively, exceeding wheat in this indicator. When irrigating, it is necessary to avoid watering during the physiological maturity stage, as well as heavy irrigation before the start of flowering, which can provoke the development of head rots. Using irrigation significantly increases the efficiency of mineral fertilizer application, providing a yield increase of up to 2.0 t/ha.
General information about the subject — on the page Irrigation.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Helianthus annuus L. · Sunflower
VRANCEANU ALEXANDRU VIORELVOINESCU GHEORGHEPACUREANU JOITA MARIASTANCIU DANILSTANCIU MARIA
Helianthus annuus L. · Sunflower
RAGT 2N S.A.S
Helianthus annuus L. · Sunflower
MAS SEEDS
Helianthus annuus L. · Sunflower
MAY-AGRO SEED CORPORATION
Helianthus annuus L. · Sunflower
Steve Thompson
Helianthus annuus L. · Sunflower
Rustica Prograin Genetique SA (FR)
Helianthus annuus L. · Sunflower
Agro Bio Seed Ltd, BG
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
ADVANTA SEEDS B.V.
Helianthus annuus L. · Sunflower
Universita Degli Studi Di Udine
Helianthus annuus L. · Sunflower
SEMILLAS BATLLE S.A.
Helianthus annuus L. · Sunflower
Frank Jozsef / Szabo Antal / Ivan Jozsef / Kiss Zoltan
Helianthus annuus L. · Sunflower
RAGT 2n, FR
Helianthus annuus L. · Sunflower
Frank Jozsef / Hollosi Szilard / Ivan Jozsef / Kiss Zoltan / Nemeth Gizella / Szabo Antal
Helianthus annuus L. · Sunflower
ASGROW SEED CO
Helianthus annuus L. · Sunflower
Yalcin Kaya, Tahir Gucer, Ibrahim Yilmaz, Veli Pekcan, Goksel Evci,
Helianthus annuus L. · Sunflower
PACIFICO
Helianthus annuus L. · Sunflower
Northrup King Semences SA (FR)
Helianthus annuus L. · Sunflower
Hendrik W. van der Velde
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
Helianthus annuus L. · Sunflower
LIMAGRAIN VERNEUIL HOLDING S.A.
Helianthus annuus L. · Sunflower
Hostiev IEvhen
Helianthus annuus L. · Sunflower
Institute of Field & Vegetable Crops (RS)