Effect of water salinity on N&K efficiency in sugar beet cultivation
2005
Jahadakbar, Mohammad Reza | Marjovi, A`li Reza | Ebrahimian, Hamid Reza | Malaki, Mohammad Reza | Torabi, Asghar | Ranji, Zabih Ol-Lah
Dtermination of nitrogen and potash use efficiency for sugarbeet cultivar is important in salinity area. The objective of this study was determination of optimum need to Nitrogen(N) and potassium(K) for 7233-P29*MC2 cultivar in salinity area. A field study was coducted at Isfahan-Rodasht Rsearch Station during 2000 to 2003. The experimental design was split plot factorial and main plot were consist of three quality water( 4, 8 and 12 dS/m) and subplot were consist of 9 tratments( N K). N had three level (1- Recommended in normal condition(check=400 Kg Urea per hectar) 2- 25% higher 3- 50% higher) and K had three level(Recommended in normal condition (check=100 Kg K2SO4 per hectar) 2- 50% higher 3- 100% higher). The method of planting was single row and thining managed after establishment stage.The results showed that, had no significant effect between treatments in top yield(TY) , sugar content(SC) and impurities of juice . With cosumption of 25% higher N from check had significant effect on RY, TY, SY and WSY. Combined analysis of result showed that RY, SY and WSY decrease with incresing of salinity . With cosumption of 25% higher N from check had significant effect on RY, TY, SY and WSY. Potash had significant effect on increaseing of RY, SY and WSY. The result indicated suitable nitrogen consumpte is 25% higher from normal condition recommended for RY and SY, but for WSY recommended in normal condition is enough.
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