Nitrogen levels and shoots cutting influenced on oil contents, yield and yield attributes of Canola

Muhammad Tufail

doi:10.19045/bspab.2015.41005

Abstract

The performance of canola (Brassica napus L.) was evaluated using various nitrogen levels and shoots cutting at New Developmental Farm of The University of Agriculture, Peshawar, Pakistan during Rabi 2012-13. The experiment was laid out in randomized complete block design (RCBD) with split plot arrangement having four replications each. Nitrogen levels @ 0, 50, 75 and 100 kg ha -1 were allotted to main plots, while shoots cutting i.e. 0, 5, 10, 15 and 20 cm were allotted to sub plots. Results showed that nitrogen application had significantly affected all studied parameters. Plots treated with 100 kg N ha -1 produced maximum seeds pod -1 (23), 1000 seeds weight (3.59g), seed yield (1169 kg ha -1 ), oil contents (49%), oil yield (600 kg ha -1 ) and harvest index (14%) as compared with control plots. Shoots cutting had significantly affected all the parameters except harvest index. Shoots cut with 20 cm had significantly maximum oil content (50%), seed yield (1092 kg ha -1 ) and oil yield (568 kg ha -1 ) as compared with other shoots cuts, but no cut plots produced maximum seeds pod -1 (21), 1000 seeds weight (3.3g) and seed yield is statistically at par with 20 cm shoots cut plots. Interaction between nitrogen levels and shoots cutting revealed that plots treated with 100 kg N ha -1 with no cut or 20 cm shoots cut had maximum seeds pod -1 , 1000 seed weight, oil content (%), seed yield and oil yield. It was concluded from the present results that supplied nitrogen @ 100 kg ha -1 with no cut or 20 cm shoots cut seems to be

Highlights

Canola (Brassica napus L.) is considered as the most important source of vegetable oil and protein-rich meal worldwide
While N is important for all crops, wherever possible this review focuses on canola (Brassica napus L.), a crop which has its genetic roots as an ancient oilseed crop known as rapeseed
Mean value of the nitrogen level indicated that plot treated with 100 kg ha-1 produced maximum seeds pod-1 (23) while the lowest seeds pod-1 (15) was recorded in control plots

Summary

Introduction

Canola (Brassica napus L.) is considered as the most important source of vegetable oil and protein-rich meal worldwide. Table-1, Number of seeds pod-1, thousand seeds weight (g), oil content (%), seed yield(kg ha-1), oil yield (kg ha-1) and harvest index (%) of canola as affected by nitrogen levels and shoots cutting. These results are in line with the findings of [10] who reported that increasing rate of nitrogen application significantly increased oil content over control plots because N is involved in the synthesis of oil.

Results

Conclusion