Effectiveness of Different Levels of N, P and K on Growth and yield of two Canola Cultivars (Brassica napus L.) in Saline Condition (Qom Province)
2009
Mirza Pur, Mohammad Hadi | Khosh Goftar, Amir Hossein | Vakil, Reza | Kucheh Baghi, Amir Hossein | Haji Reza, Mohammad Reza | A`lavi, A`bbas
Three field trials were conducted in two sites(in 1st farm,with irrigation water and soil salinity levels of 5.5 and 5.8 dS.m-1,OC% equal 0.3, P and K available 6 and 16 mg.kg -1 respactively and in 2nd site, with irrigation water and soil salinity levels of 8.3 and 8.1 dS.m-1,OC% equal 0.4, P and K available 4 and 195 mg.kg -1 respactively) in a split plots experiment with randomized complete blocks design and three replicates in Qomroud district of Qom province during 2006-2007. The nitr ogen treatments were six levels, i.e. 0, 45, 90, 135, 180 and 225 kg N. ha -1, Phosphorous treatments were five levels, i.e. 0, 45, 90, 135 and 180 kg P2O 5. ha-1 and Potassium treatments were five levels, i.e. 0, 50, 100, 150 and 200 kg K2O. ha -1. It was done on two canola varieties cultivars, i.e. Hyola-401 and PF varieties. The results showed in both irrigation water salinity levels, increasing N level up to 225 kg N. ha-1 , enhanced seed yield and dry mater significantly(p0.05) in comparison with control ( no nitrogen application) and as well as entire N levels; whereas, the oil content seed decreased (p0.05). The Hyola-401 variety had comparative preference to PF variety in seed yield and oil content. In addition, raising P application, up to 90 kg P2O 5. ha-1 (in ECW
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