Sowing date and seeding rate effects on grain yield and yield components of advanced barley cultivar (Karoon * Kavir)
1999
Safaei Hakimi, Nasim | Motamed, Asad Ol-Lah
This two year experiment carried out at Karaj experimental farm to determine the best sowing date and seeding rate in advanced barley cultivar Karoon*Kavir using RCBD in strip plot arrangement in three replicates. The horizontal and vertical factors were seeding rates (250, 300, 350 and 400 seeds per square meters) and sowing dates (Oct. 20 and 26, Nov. 10 and 25), respectively. The length and width of the plots were 6 and 2.4 meters and harvest area was 12 m2. The combined anova made on the studied traits data were grain and biological yield and harvest index. Results showed significant effect of seed rate on grain and biological yield and harvest index. The maximum values of grain yield (8 t ha-1), biological yield (17.260 t ha-1) and harvest index (46.35%) obtained from first seed rate which was significantly (P0.05) different from other seed rates. Despite no significant effect of sowing date on grain and biological yield and harvest index which shows non-sensitivity of this genotype to photoperiod, the 2nd date with grain yield (7.292 t ha-1) and biological yield (17.4 t ha-1) was superior to other treatments. While the maximum harvest index (44.981%) belonged to the 4th seeding date. Combined anova results showed the 1st seed rate and 3rd and 4th sowing dates produced highest grain yield of more than 8 t ha-1. In the same 1st seed rate, maximum significantly different biological yield (18 t ha-1) was obtained from 1st, 2nd and 3rd sowing dates. Highest significantly different harvest index (47.65%) belonged to the same seed rate but from 4th sowing date.
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