Evaluation of time and rate applications of zinc fertilizer on quantity and quality of Faba bean (Vivia faba)

In order to evaluate times and rate applications of zinc fertilizer on quantity and quality of faba bean، an experiment was carried out to form factorial in randomized of complete block design with four replications at Farm Research of Gonbad Kavous University during 2009 – 2010. Two times of application were including before flowering and beginning of pod setting and five rates of application was 0، 1، 2، 3 and 4 liter/ha of zinc solution (15%). Results showed that pod coat weight (α = 0. 01) and number of filled pods/plant، seed weight/pod coat weight and protein percentage of seeds (α = 0. 05) were significantly affected by time of zinc application. Effect of zinc rates on all traits were significant (α = 0. 01). Pod coat weight and number of filled pod/plant at first time of zinc application were higher than second time but seed weight/pod coat weight and protein percentage of seeds at second time of zinc application were higher than first time. Minimum and maximum of filled pod/plant، seed/pod، seed/plant، 100-seed weight، seed yield، pod coat weight، seed weight/pod coat weight، protein percentage، protein yield and relative yield belonged to none application of zinc and application of 4 lit/ha respectively. None application of zinc produced 2597 kg/ha and application of 4 lit/ha produced 3993 kg seeds/ha.