نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش‌آموخته کارشناسی ارشد، گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران
2 استاد، گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران
3 دانش‌آموخته دکتری، گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران
4 دانشیار ، گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In order to investigate the effect of different tillage systems and planting density on yield and yield components of some of barley cultivars, an experiment was conducted at the Research Farm of Agricultural and Natural Resources Campus of University of Tehran in 2016-2017. Experiment was conducted as split-split plot experiment based on completely randomized blocks design with four replications The main plot was the different systems of tillage and the sub-plot were included three barley cultivars (Bahman, Nik and Nosrat) and the sub-sub plot included three planting densities (320, 400 and 470 plants per m2). the Nik cultivar in conventional tillage (9765 kg.ha-1) and no-tillage (9030 kg.ha-1) and Bahman cultivar in the reduced tillage system (8574 kg ha-1) had the highest grain yield. Even though Nusrat cultivar had more 1000 seed weight (38.4 g) than Nik cultivar and Bahman, but due to the lower number of fertile tillers, the number of seeds per spike and the number of fertile spikes per plant, that had lower the yield and harvest index in different tillage systems and planting densities. In the density of 320 and 400 plants per m2, no significant difference was observed in harvest index, and with the increase in density from 400 to 470 plants per m2, the harvest index decreased from 50.7 to 46.3%. Therefore, the cultivation of Nik in conventional tillage and no-tillage systems and Bahman in reduced tillage system and at the optimal density can lead the way in increasing grain production in Alborz province.
کلیدواژه‌ها [English]
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