بررسی مقادیر و زمان مصرف ازت بر روی عملکرد و اجزا عملکرد دو رقم کلزا

The purpose of tills experiment was to find the most suitableamount and time of nitrogen fertilizer two rapeseed varieties in this area. The study was carried out as a split split plot design using randomized complete block wilh three replications in fall season in Agriculture Research,Center,Boraqan in 2000-2001 The main plots consisted of two rapeseed rarities (pf7045/91,oplion500) and subplot was including 4 levels(100,140,180,220kg/ha) were applied in 3slagesof 'A roset,l/2 stocking ,1/3 roset, 1/3 stocking 1/3 flowering , \'i roset ,1/4 stocking, 1/; Cowering , '.tpodding. Treatments were planted in the farrows with inter row30*5 cm . Acording to the results of combined analysis were performed on data.There was significant difl'erenc at 1% level observed between cultivars and significant differences observed between amount ofnitrogent 5% level and other factors no significant . Comparison of mean by DMRT indicated that the highest yield obtained from oplion500 in amount of Nitrogen wiihl80kg/ha at 3 times (roset.steni, flowering) with 2033kg/ha , least yield from thai variety was pf7045/91(180kg/lia) at 4 timeswith 1304 ke/ha.Therefore oplion500 is suitable culljvar and aniountlSOkg/ha and 3times(rosel, stem, flowering) are recommended for Bushehr province.

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