Integrated nutrient management on the productivity of Brassica sp, p. and its residual effect on the succeeding green gram crop

S Maiti, T Patra, Ands Ojha
2005 Journal of Crop and Weed   unpublished
To evaluate the direct effect of manuring on the productivity of different varieties of rapeseed and mustard and its residual effect on succeeding green gram crop a field experiment was conducted at the Bidhan Chandra Krishi Viswa Vidyalaya during 2002-03 and 2003-04. The experiment was laid out in a Factorial Randomised Blocl< Design with four varieties of rapeseed and mustard and four manurial treatments. The green gram (variety-B-1) was grown after rapeseed and mustard without fertilizer
more » ... ication. Results revealed that mustard varieties showed vigorous growth and long duration (1 10 days) as compared to rapeseed variety (90 days duratior:i). Higher number of siliqua/m 2 (33.1 %), heavy seed weight (99.4%) and grain yield were recorded in mustard varieties than that of rapeseed variety whereas number of seed/siliqua (25 .13) and oil content (38.11%) were more in rapeseed as compared to mustard (12.74, 37.85%, respectively). Maximum number of siliqua/m 2 (4154), 1000 grain weight (4.99 g}, grain yield (1.48 Uha), net economic return (Rs. 21082/ha) anc:I return per rupee investment (Rs. 1.98) was obtained when mustard variety kesari-1 00 received 100% N/ha as straight fertilizer. Maximum grain yield of green gram was recorded (127 kg/ha) where mustard variety Swarna received 25% N as straight fertilizer along with 75% N as FYM. Rapeseed and mustard are two important edible oilseed crop of lndo-Gangetic plains which occupies about 23% of total oilseed area and contributes 25% of total oilseed production of the country. Th ough the productivity of Brassica oilseed spp. is increasing gradually but it is for below the International level of 3.9 t/ha as obtained in Germany. One · of the reasons for low yield is the lack of physiologically efficient plant type. Besides improved variety, maximization of yield is not possible with the application of inorganic fertilizers only. Organic manure is required both in terms of soil health and proper utilization of inorganic fertilizers. With this idea is view the pres€ nt experiment has been conducted to evaluate the yield potentiality of different varieties of rapeseed ar.d mustard when fertilized with inorganic and in conjunction with organic manure. MATERIALS AND METHODS Experiment was conducted for two years (2002-03) and (~003-04) on a sandy loam entisol neutral soil having 0.071% N, 0.78% organic carbon, 24.26 kg available P 2 0s/ha and 178-34 kg/ha available K 2 0 at the Bidhan Chandra Krishi Viswavidyalaya located at 22.93°N latitude and 88.53°E longitude at an altitude of 9.75 m rear above sea level receiving 1500 mm rainfall per