برآورد بازده سرمايه گذاري در تحقيقات ارقام اصلاح شده گندم آبي در ايران

The evaluation effect of Zn and Fe fertilizer on yield and component yield of two sunflower cultivars in Arsangan

A field experiment was conducted to evaluate the effect of Zn and Fe fertilizer on yield of two Sunflower cultivars . This study was conducted in a split plot arangement with 4 replications in 2002 at Arsanjan . Main plot consisted of two Sunflower cultivars (Zaria , High sun 25 ) . Sub plots consisted of two levels of zinc and iron ( Z1=0 , Z2= 40 , F1= 0 , F2= 20 Kg / ha ) have used in this experiment Agronomic characteristice : Head diameter , 1000 – seed weight , stem diameter , plant height , harvest index , kernel ratio , oil and protein percentage were determined . Results showed that seed yield was not significantly affected by cultivars whereas it was significantly affected dy fertilizer ( 40 Kg / ha zinc alone ) had highest seed yield ( 3851.5 Kg / ha ) , also plant dry matter production was signifcantly affected by fertilizer and varieities , at the same treatment ( 40 Kg / ha zn alone ) had highest dry matter ( 11793 Kg / ha ) . Maximum leaf area index belonged to the ( 40 Kg / ha zn alone ) . Head diameter , 1000 - seed weight , stem diameter , were significantly affected by fertilizer and potein percentage were significantly affected by varieties .