Morphological characteristics of canola (Brassica napus L.) influenced by irrigation disruptions and biological phosphorus

Results of evaluation of irrigation (irrigation disruption at beginning of flowering, end of flowering, grain filling and control) and biological phosphorus (0, 50, 100 and 150 g/ha) on the yield of Brassica napus L. cv. Hyola 401 , a split plot experiment was carried out based on randomized complete block design with four replications at the Research Farm of Shahid Beheshti Agriculture College (latitude 38° 51' N and longitude 41° 44' E and 1313 m above sea level) in 2010. Results of ANOVA showed the significant interaction effect between irrigation disruptions and phosphorus on morphological characteristics like plant height, stem diameter, number of nods and stem weight. Means comparisons indicated that the maximum plant height (68.87 cm) belonged to normal irrigation without phosphorus application, The minimum plant height (48.14cm) belonged to irrigation disruption at the beginning of flowering stage with 50 g/ha phosphorus. The maximum (0.96 cm) and minimum (0.27 cm) stem diameter obtained from irrigation disruption at the beginning of flowering stage with 50 and 0 g/ha biological phosphorus application, respectively. The highest number of nods (14.19) was obtained from 150 g/ha of phosphorus in irrigation disruption at grain filling. The lowest number of nods (6.75) belonged to 100 g/ha of phosphorus used in irrigation disruption at the end of flowering. The greatest stem weight (21.58 g/plant) belonged to 50 g/ha biological phosphorus in control treatment of irrigation. The minimum stem weight (10.43 g/plant) was obtained from 0 g/ha of phosphorus application in disruption at the beginning of flowering.

کلیدواژه ها:

Brassica napus L. ، biological phosphorus ، irrigation disruption ، morphological traits