The Effects Of Timing Harvest On The Quality Yield Two Cultivar Canola In Sistan Region

In order to determine the effective harvesting time on quantitative and qualitative yield canola (Brassic.napus) cultivars a field experiment was conducted in station reserch zahak during 2002-2003 years.In experiment using from a spilt design based on Randomized Complete Block design with 3 replication. The cultivars was given the mainplot at two level (V1=(pf)Sarigol V2=Hyola308 ) in the subplot harvesting timeweregivenatsevenlevel: T1= harvesting in 10% change color seed in main stem siliquas T2= harvesting 3 day after from 10% change color seed in main stem siliquas T3= harvesting 6 day after from 10% change color seed in main stem siliquas T4= harvesting 9 day after from 10% change color seed in main stem siliquas T5= harvesting 12 day after from 10% change color seed in main stem siliquas T6= harvesting 15 day after from 10% change color seed in main stem siliquas T7= harvesting 18 day after from 10% change color seed in main stem siliquas. In order to determine of ripend to 10% change color seed in main stem siliquas sampling was carried every 5days after the end flowering.Also in every stage after harvesting percen moisture per seed and percent color chanch is defined .Results achieved from Analysis Variance compound showed that harvesting time had a different significant in level 5% on harvest index and flowering period and in 1% level on number siliqua in plant, W1000seed, hieght, grain yield, oil yield,biological yield and of growing period. Mean comparisons showed that T3 treatment had the highest grain (3746 kg/ha)that in other word those treatments T6= harvesting 15 day after from 10% change color seed in main stem siliquas T7= harvesting 18 day after from 10% change color seed in main stem siliquas) had33% and 32% more grain yield respectively. Effects of studied cultivars on the biological yield was significant at 5% level.Also effects of cultivars on the seed number in siliqua,grain yield,oil yiel d,harvest index, hieght and vegetation period length were significant at 1%level . Hyola 308 hybrid with 3553kg/ha showed 21%more yield them pf cultivar. The most and the least oil percent was producted to Hyola 308 and pf ( 46% and 43%) respectively. Oil percent any Significant difference between harvesting times.But The most and the least oil yield was belong to T3= harvesting 6 day after from 10% change color seed in main stem siliquas and T7= harvesting 18 day after from 10% change color seed in main stem siliquas ( 1654and 835kg/ha) respectively .