Effect of planting density and nutrient management on performance of hybrid maize genotypes under maize-wheat cropping system
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Date
2018
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Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur)
Abstract
An investigation entitled “Effect of planting density and nutrient management on performance of hybrid maize genotypes under maize-wheat cropping system” was carried out during 2015-16 and 2016-17 at experimental farm of Tirhut College of Agriculture, Dholi (Muzaffarpur), a campus of Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar. The experiment involving genotypes in main plot, density in sub plot and nutrient management in sub-sub plot, was carried out in split-split plot design. Treatments were replicated thrice with maize hybrid genotypes Pioneer 3540 and Rasi 4595, density 50X20 cm and 60X20 cm as well as nutrient management RDF, STCR and SSNM. In rabi, wheat variety K 307was grown in each plot with application of only recommended dose of fertilizer(N,P2O5 and K2O 120,60 and 40 kg/ha) to assess the residual response of maize hybrid genotypes, density and nutrient management.
The results revealed that growth parameters like plant height, number of leaves, dry matter accumulation, yield attributes like length of cob, cob weight, number of grains/cob, weight of grains/cob and grain yield (5.38 tons/ha) were found to be maximum under Pioneer 3540 genotype and were significantly superior over (5.05 tons/ha) of Rasi 4595 genotype. Leaf area index, Days to 50% tasselling and silking, number of cobs/plant, girth of cob, test weight and stover yield were not influenced by genotypes of hybrid maize.
Gross return, net return and B: C ratio (Rs 103496, 69583/ha and 2.35) respectively, were recorded to be significantly higher in Pioneer 3540 genotype of hybrid maize, which was significantly superior over (Rs 95489, 64705/ha and 2.19) respectively, genotype Rasi 4595.
Density influenced significantly on the growth, yield attributes and yield of maize in both the years of maize. Growth parameters like plant height, number of leaves, dry matter accumulation, leaf area index and yield attributes like length of cob, girth of cob, cob weight, number of grains/cob, weight of grains/cob, test weight and grain yield (5.33 tons/ha) were found maximum under 60X20 cm plant density and were significantly superior over (5.10 tons/ha) 50X20 cm plant density.N, P and Kcontent and their uptake were found higher under 60X20 cm plant density,which was significantly superior over 50X20 cm plant density. Significantly higher net return (Rs 68194/ha) and B:C ratio (2.34) were recordedunder 60X20 cm plant density,which was significantly superior over (Rs 66094/ha) and (2.19) under 50X20 cm plant density.
Nutrient management had significant effect on the growth, yield attributes and yield of maize in both the years of experimentation. Growth parameters like plant height, dry matter accumulation, leaf area index, yield attributes like length of cob, girth of cob, cob weight, number of grains/cob, weight of grains/cob, test weight and grain yield (5.63 tons/ha) were found maximum under STCR nutrient management and were significantly superior over SSNM as well as N, P and Kcontent and their uptake were found higher under STCR, which was significantly superior over (5.12 tons/ha) SSNM. Significantly higher B:C ratio (2.32) of maize achieved with SSNM, which was statistically at par with (2.26) RDF during both the years of experimentation.
The residual effect of genotypes and density did not show significant influence on growth and yield of wheat during both the years of experimentation. Nutrient management had slightly significant effect on the yield of wheat during second year of experimentation.
The effect of genotypes and density did not show significant influence on system productivity during both the years of experimentation. Nutrient management had significant effect on the system productivity however, maximum system productivity (10.27 tons/ha) was recorded in STCR.
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