Effect of different fertility levels on growth, yield attributes, yield and quality of Indian mustard (Brassica juncea L.) Amit

Abstract

A field experiment was conducted during rabi season 2014-15 at the N.E. Borlaug Crop Research
Centre of the G.B Pant University of Agriculture and Technology, Pantnagar to study the effect of
different fertility levels on growth, yield attributes, yield and quality of Indian mustard (Brassica
juncea L.) cultivar RGN-73. Treatment consisted of three levels of nitrogen (60, 80 and 100 kg/ha),
two levels of phosphorus (20 and 40 kg/ha) and two levels of potassium (0 and 30 kg/ha) were
evaluated thrice in a randomized block design. Application of 100 kg N + 40 kg P2O5 + 30 kg K2O/
ha produced significantly higher seed yield (1925 kg/ha) and other growth and yield attributes viz.
dry matter accumulation (42.6 g/plant), primary branches/plant (8.4), secondary branches/plant
(9.3), siliquae/plant (256.6), seeds/siliqua (13.8), length of siliqua (4 cm), 1000-seed weight (3.9
gram), stover yield (7638 kg/ha), biological yield (9525 kg/ha), oil yield (715 kg/ha) and protein
yield (401 kg/ha) as compared to application of 60 kg N + 20 kg P2O5 + 0 kg K2O/ha. Effect of
different fertility levels on plant height, leaf area index, crop growth rate, relative growth rate, oil
and protein content was found to be non-significant. Maximum plant height (200.3 cm), leaf area
index (0.7), crop growth rate (0.046 g/m2/day), relative growth rate (2.71 mg/g/day) and protein
content (20.8%) was found with application of 100 kg N + 40 kg P2O5 + 30 kg K2O/ha and lowest
with application of 60 kg N + 20 kg P2O5 + 0 kg K2O/ha but maximum oil content was found (38.2%)
under the application of 80 kg N + 40 kg P2O5 + 30 kg K2O/ha. Hence, the farmers could economically
benefited by using Indian mustard cultivar RGN-73 with recommended doses of fertilizers.