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Dinamika nalivanja zrna ozimog dvoredog ječma
Naučni institut za ratarstvo i povrtarstvo, Novi Sad
Ključne reči: ozimi ječam (Hordeum vulgare L ); nalivanje zrna; prinos; korelacije
Sažetak
Nakon formiranja broja zrna po klasu, masa zrna zavisi od intenziteta i perioda nalivanja zrna. Intenzitet nalivanja označava količinu akumulirane suve materije u jedinici vremena, dok trajanje nalivanja obuhvata period od cvetanja do fiziološke zrelosti. U ovom radu je ispitivano trajanje i intenzitet nalivanja zrna i sadržaj vode u zrnu tokom perioda nalivanja kod četiri sorte ozimog ječma. Suma aktivnih temperatura (SAT) od cvetanja je korišćena kao vremenska skala. Odnos između mase zrna i SAT je predstavljen kvadratnom jednačinom regresije, a odnos između sadržaja vode u zrnu i SAT linearnom jednačinim regresije. U zavisnosti od sorte i godine, intenzitet nalivanja se kretao 0,058-0,082mg zrno-1_C-1 a trajanje nalivanja 505-887 SAT. Prinos je bio u pozitivnoj korelaciji (r=0,70) sa intenzitetom a u negativnoj korelaciji (r=-0,57) sa dužinom perioda nalivanja. Korelacija između intenziteta i trajanja nalivanja je bila negativna. Pozitivna korelacija između intenziteta i mase zrna, kao i mase zrna i prinosa, omogućava indirektno selekciju na prinos i visok intenzitet nalivanja zrna putem selekcije na krupnije zrno.
Reference
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jezik rada: srpski
vrsta rada: neklasifikovan
objavljen u SCIndeksu: 24.11.2009.

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