تاثير سطوح مختلف محلول پاشي عنصر سيليسيم و تراكم كاشت بر خصوصيات كمي كلزا - Hyola 42 در شرايط آب و هوايي ورامين

Effect of different levels of silic spraying and plant density on some quantitative characterestics of rapeseed(Hyola-42) in varamin condition.

In order to evaluate the effects of different levels of silic spraying and plant density on quantitative characteristics of hybrid Hyola-42 in rapeseed (Brassica napus),afield experiment was conducted in field research (Galea sien)in Collage of Agricultural of Varamin,in 2007-2008 cropping season .The experimental design was arranged factorial in a randomized complete block design with three replications and 27 treatments. In this research plant density was in three levels : 500 ,650 and 800 thousands plant per hectar. and Silic spraying concentration were in three levels,consisting non- spraying (control), spraying of silic with 3 6 per thousantds .The results showed grain yields has a straight correlation with yield components. Increase and decrease yield components is reason of changing of total yeild .The highest grain yield was obtained from Silic spraying with 6 per thousand with average yield 3372.3 Kg/ha .This treatment had 28.9 percent increase yield in ratio with control treatment (with 2400 Kg/ha).Also highest of plant height, Number of branch , number of silique per plant , number of grain per silique ,1000 grain weight and biological yeild with 136.1 cm, 4.3 ,188.3, 17.3, 3.34 (gr) and 7822.6 Kg/ha was obtained from silic spraying with concentration 6 per thousands.In this research plant density showed significant differences on characteristics of experiment . The highest grain yield was obtained from density(800 000 plant per hectar) with average yield 4351.3 Kg/ha. The lowest grain yield was obtained from density(500 000 plant per hectar) with average yield 2343.3 Kg/ha. The results of extraction effect showed that there were significant defferences among plant density and Silic spraying on this adject at 5%, 1% levels. The highest plant height, Number of Silique per plant, grain yield and biological yield from treatment density and Silic spraying (800000plant per hectar and 6 per thousand).at last this result was known density and silic spraying (800000plant per hectar and 6 per thousand) is recommender for Varamin condition.