Atalla,, R. (2007). RESPONSE OF CANOLA PLANTS TO DIFFERENT NITROGEN FERTILIZER LEVELS, SEEDING RATES AND ROW SPACINGS IN NEWLY RECLAIMED SANDY SOILS.. Journal of Plant Production, 32(9), 7063-7075. doi: 10.21608/jpp.2007.220608
R. A.A Atalla,. "RESPONSE OF CANOLA PLANTS TO DIFFERENT NITROGEN FERTILIZER LEVELS, SEEDING RATES AND ROW SPACINGS IN NEWLY RECLAIMED SANDY SOILS.". Journal of Plant Production, 32, 9, 2007, 7063-7075. doi: 10.21608/jpp.2007.220608
Atalla,, R. (2007). 'RESPONSE OF CANOLA PLANTS TO DIFFERENT NITROGEN FERTILIZER LEVELS, SEEDING RATES AND ROW SPACINGS IN NEWLY RECLAIMED SANDY SOILS.', Journal of Plant Production, 32(9), pp. 7063-7075. doi: 10.21608/jpp.2007.220608
Atalla,, R. RESPONSE OF CANOLA PLANTS TO DIFFERENT NITROGEN FERTILIZER LEVELS, SEEDING RATES AND ROW SPACINGS IN NEWLY RECLAIMED SANDY SOILS.. Journal of Plant Production, 2007; 32(9): 7063-7075. doi: 10.21608/jpp.2007.220608
RESPONSE OF CANOLA PLANTS TO DIFFERENT NITROGEN FERTILIZER LEVELS, SEEDING RATES AND ROW SPACINGS IN NEWLY RECLAIMED SANDY SOILS.
Two field experiments were carried out at Ismailia Agricultural Research Station in Ismsilia governorate during 2002/2003 and 2003/2004 growing seasons to study the effect of three nitrogen levels (30,45 and 60 Kg N/fed), three seeding rates (1.5,2.5 and 3.5 Kg seeds/fed) and two spacing between rows (25 and 50 cm) on growth, yield and yield components as well as seed oil content of canola (cv Serw 4) (Brassica napus , L.).
Results over the two growing seasons revealed that :
1- Plant height, number of racemes and siliquas/plant, seed yield /plant, weight of 1000- seed, seed and oil yields /fed were significantly increased with increasing nitrogen level up to 60 kg N/fed. The opposite was true for seed oil content in both seasons.
2- Increasing seeding rates significantly decreased plant height, number of racemes and sliquas /plant ,seed yield/plant, weight of 1000-seed and seed oil content. Seed and oil yields /fed were maximum at seeding rate of 2.5 Kg/fed, followed by 3.5 Kg/fed. The lowest seed and oil yields/fed were obtained when seeding rate 1.5 Kg /fed in the two seasons.
3- Increasing row spacing from 25 to 50 cm resulted in significant increases in all studied characters, except seed oil content in the two seasons.
4- In both seasons the interaction effect between nitrogen levels and seeding rates had significant on plant height ,seed yield/fed, seed oil content and oil yield/ fed ,while number of racemes /plant significant in the second season. The interaction effect between nitrogen levels and row spacings had significant on plant height in both seasons and number of racemes/plant in the first season .Also the interaction effects between seeding rates and row spacings had significant on number of racemes/plant in the first season ,seed yield/plant and seed oil content in the second season. The highest values of seed and oil yields/fed were obtained when canola plants grown at 2.5 kg seed/fed in rows 50 cm apart and received 60 kg N/fed.
5- Simple correlation among studied characters revealed that seed yield/fed was positively and significantly correlated with plant height , number of racemes and siliquas /plant , seed yield/plant, 1000-seed weight and oil yield /fed in both seasons. Seed yield /fed was significantly and negatively correlated with seed oil content in the two seasons .
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