Dk 3890
ActiveHelianthus annuus L. · Sunflower
PFIZER GENETICS (US)
FR
3 records
Cultivation
Sunflower Seeding Rate
Helianthus annuus L.
The sunflower seeding rate is defined as a tool for managing plant stand density to optimize nutritional area, ensure seed oil content, and balance soil moisture availability with hybrid potential.
In the reference 24 varieties crop Sunflower, where this is mentioned in the description.
The calculation of the seeding rate is based on the target plant density at harvest, which is adjusted by 10–25% to compensate for field emergence failures and technical losses. In arid conditions, the rate is reduced to 35–45 thousand plants/ha to minimize intraspecific competition, while in zones with sufficient moisture or under irrigation, it is increased to 55–65 thousand plants/ha.
Overcrowding sunflower crops leads to a 2–3% decrease in oil content and a reduction in thousand-seed weight due to intense competition for resources. Given the crop's limited ability for branching and compensating for sparse stands, uniform seed distribution and achieving synchronous emergence are critical factors for productivity. Furthermore, the selection of stand density regulates the microclimate within the canopy, which is essential for preventing the development of head rots.
General information about the subject — on the page Seeding rate.
Varieties of Sunflower mentioned in the description
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.
Labud
ActiveHelianthus annuus L. · Sunflower
CZ
SK
6 records
Yana
ActiveHelianthus annuus L. · Sunflower
Encheva, Stoyanova, Hristov, Nenov, Ivanov, Nikolova, Petrov, Petakov, Velkov, Encheva, Shindrova, Piskov, Tsvetkova, Ivanov
BG
4 records
Orenbar
TerminatedHelianthus annuus L. · Sunflower
Prograin Genetique (FR)
FR
3 records
Petenera
ActiveHelianthus annuus L. · Sunflower
SEMILLAS BATLLE S.A.
IT
3 records
U-55 E
TerminatedHelianthus annuus L. · Sunflower
Frank Jozsef / Hollosi Szilard / Ivan Jozsef / Kiss Zoltan / Nemeth Gizella / Szabo Antal
CZ
HU
2 records
Zahrava
ActiveHelianthus annuus L. · Sunflower
Parii Anna Fedorivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
UA
2 records
Soniachnyi nastrii
ActiveHelianthus annuus L. · Sunflower
Parii Anna Fedorivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
UA
2 records
8n453dm
ActiveHelianthus annuus L. · Sunflower
Steve Thompson
UA
3 records
HSX 9801
Protection expiredHelianthus annuus L. · Sunflower
HU
3 records
Tastysun
ActiveHelianthus annuus L. · Sunflower
SK
3 records
Argo
ActiveHelianthus annuus L. · Sunflower
APSOVSEMENTI S.P.A.
IT
2 records
Alfeo
ActiveHelianthus annuus L. · Sunflower
APSOVSEMENTI S.P.A.
IT
1 record
8H358CL
ActiveHelianthus annuus L. · Sunflower
DOW AgroSciences
IT
1 record
Talmaz CL
Application submittedHelianthus annuus L. · Sunflower
SEEDECO Semences SRL (MD)
BG
1 record
Khoryv
ActiveHelianthus annuus L. · Sunflower
Zviahintseva Anna Mykolaivna, Kyrash Tetiana Mykolaivna, Andriienko Viktor Valentynovych, Leonova Nina Mykolaivna, Kuzmyshena Nadiia Viktorivna, Kolomatska Valeriia Pavlivna, Syvenko Valentyna Ivanivna, Makliak Kateryna Mykolaivna, Kyrychenko Viktor Vasyl
UA
2 records
Slavianyn
Application submittedHelianthus annuus L. · Sunflower
UA
1 record
NS-H-26-RM
TerminatedHelianthus annuus L. · Sunflower
SK
1 record