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
Remy ROUANET
Helianthus annuus L. · Sunflower
Joel Meunier
Helianthus annuus L. · Sunflower
DICU GEORGETAFUIA STELIANSTATE DANIEL
Helianthus annuus L. · Sunflower
GROWER SEED ASS.
Helianthus annuus L. · Sunflower
Syngenta Crop Protection AG
Helianthus annuus L. · Sunflower
Advanta Seeds International
Helianthus annuus L. · Sunflower
S.I.G.C.O. RESEARCH Inc. (US)/Rustica Bio-Recherches (FR)
Helianthus annuus L. · Sunflower
SYNGENTA SEEDS AG, CH
Helianthus annuus L. · Sunflower
Ragt, F
Helianthus annuus L. · Sunflower
SYNGENTA CROP| Syngenta Crop Protection AG
Helianthus annuus L. · Sunflower
Sebastien Chatre
Helianthus annuus L. · Sunflower
Pacific Seeds Pty Ltd
Helianthus annuus L. · Sunflower
ICI SEEDS DIVISION AGRICOLA
Helianthus annuus L. · Sunflower
KOIPESOL SEMILLAS, S.A.
Helianthus annuus L. · Sunflower
SYNGENTA FRANCE S.A.S.
Helianthus annuus L. · Sunflower
SYNGENTA FRANCE S.A.S.
Helianthus annuus L. · Sunflower
Rustica Prograin Genetique
Helianthus annuus L. · Sunflower
Sadik El Sayed
Helianthus annuus L. · Sunflower
Yves BIOULAC
Helianthus annuus L. · Sunflower
SIGCO SUN PRODUCTS
Helianthus annuus L. · Sunflower
RAGT 2N S.A.S
Helianthus annuus L. · Sunflower
Joel Meunier
Helianthus annuus L. · Sunflower
RUSTICA (FR)
Helianthus annuus L. · Sunflower
Institute of Field & Vegetable Crops (RS)