Rice (Oryza satiava) straw mulch, irrigation and nitrogen effects on productivity and nitrogen-use efficiency of Bt cotton (Gossypium hirsutum) in subtropical environment
DOI:
https://doi.org/10.59797/ija.v66i1.2837Keywords:
Seed-cotton yield, Mulching, Irrigation, Nitrogen uptake, Nitrogen-use efficiencyAbstract
A 2-years (2015 and 2016) field study was carried out at Ludhiana, Punjab, to examine the combined effects of residue mulch, irrigation frequency and nitrogen levels on productivity and nitrogen-use efficiency of Bt cotton (Gossypium hersutum L.) in a subtropical environment.References
Bandyopadhyay, K.K., Misra, A.K., Ghosh, P.K., Hati, K.M., Mandal, K.G. and Moahnty, M. 2010. Effect of irrigation
Table 4. Effect of irrigation, mulch and nitrogen on N uptake by biomass in Bt cotton
Mulch and irrigation regimes 2015 N uptake by biomass, kg/ha 2016
N0 N50 N100 N150 N0 N50 N100 N150
M0I0.2 M0I0.3 M0I0.4 M6I0.2 M6I0.3 M6I0.4 23.9 29.3 38.4 36.3 55.2 65.4 27.6 34.2 42.1 45.4 69.8 84.0 38.2 46.4 56.6 58.6 78.3 98.2 32.5 40.7 62.4 63.0 73.9 93.3 22.7 32.0 35.3 37.0 51.1 60.7 31.8 39.7 45.5 51.7 69.6 92.4 37.5 47.7 59.8 61.2 78.5 96.3 47.3 55.7 63.7 68.5 80.0 119.1
Factor Mean LSD (p = 0.05) Year 2015 = 53.9; 2016 = 57.7 Irrigation I0.2 = 42.7; I0.3 = 55.1; I0.4 = 69.0 Year = 1.4 Irrigation = 8.0 Irrigation Mulch = 2.0 Mulch M0 = 41.3; M6 = 70.3 Nitrogen N0 = 40.6; N50 = 52.8; N100 = 63.1; N150 = 66.7 Mulch = 11.0 Nitrogen = 5.0 Mulch Nitrogen = 5.0
Table 5. Effect of treatment on NUE of Bt cotton
NUE, kg seed cotton kg/N
100 150 50 100 150
Mulch and irrigation regimes M02.8 3.7 1.6 3.0 4.1 1.4
4 3.9 1.7 4.2 4.0 1.7
M04.0 3.1 1.1 3.8 3.2 1.1
6 4.0 3.1 5.6 5.3 3.1
M610.0 5.8 3.7 9.6 6.5 3.6
6 6.0 3.7 10.8 6.3 3.8
Factor Mean Mulch M0 = 2.9; M6 = 5.8 Mulch M0 = 3.0; M6 = 6.1
Irrigation I0.2 = 3.5; I0.3 = 4.9; I0.4 = 4.8 Irrigation I0.2 = 3.8; I0.3 = 5.0; I0.4 = 4.9
Nitrogen N50 = 6.2; N100 = 4.5; N150 = 2.5 Nitrogen N50 = 6.2; N100 = 4.9; N150 = 2.5
JOSHI AND SINGH [Vol. 66, No. 1
Table 6. Effect of treatment on apparent nitrogen recovery efficiency (ANRE) of Bt cotton
2016
Mulch and irrigation regimes N50 N100 N150 N50 N100 N150
2 11.5 4.3 16.8 13.2 9.9
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