Response of Hybrid Rice (Oryza sativa L.) to Several Nitrogen Levels during Kharif (Autumn) Season in New Alluvial Zone of West Bengal
Rumi Saha
Department of Agronomy, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur- 741252, Nadia, West Bengal, India.
Megha Sana *
Department of Agronomy, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur- 741252, Nadia, West Bengal, India.
Subhajit Pal
Department of Soil Science and Agricultural Chemistry, Faculty of Agriculture, Dr. Rajendra Prasad Central Agricultural University, Pusa ( Samastipur), Bihar – 848125, Bihar, India.
Krishnendu Mondal
Department of Agronomy, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur- 741252, Nadia, West Bengal, India.
Sukanta Pal
Department of Agronomy, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur- 741252, Nadia, West Bengal, India.
*Author to whom correspondence should be addressed.
Abstract
Introduction: Rice (Oryza sativa L.) is one of the most important staple foods for more than half of the world’s population
Aim: To find out the most suitable nitrogen level for hybrid rice productivity in new alluvial zone of west Bengal.
Study Design: The experiment was laid out in Factorial Randomized Block Design (FRBD) with 10 treatment combinations and three replicates.
Place and Duration of Study: Kharif seasons of 2018 and 2019 at Regional-Research Sub-Station (RRSS) Chakdaha of BCKV under new alluvial zone of West Bengal.
Methods: Combinations having two hybrid rice varieties viz., V1 (PAN 2112 Gold), V2 (KRH-2) and five nitrogen levels viz. N1 (0:60:60 N: P2O5: K2O Kg ha-1), N2 (50:60:60 N: P2O5: K2O Kg ha-1), N3 (100:60:60 N: P2O5: K2O Kg ha-1), N4 (150:60:60 N: P2O5: K2O Kg ha-1), N5 (200:60:60 N: P2O5: K2O Kg ha-1) Generally, yield contributing characters were studied at maturity of the crop. For yield analysis samples were taken from each plot and yield attributes were calculated.
Results: Results revealed that almost all yield attributes gave significantly superior performance in the variety PAN 2112 Gold with N4 level of fertilization. The maximum grain yield (5.10 t ha-1) was recorded in the variety V1 in combination with N4 level of nitrogen which was 6.69% more than KRH-2. Highest harvest index (50.86%) was noticed in same treatment combination.
Conclusion: It may be concluded that PAN 2112 Gold with fertilizer dose N: P2O5: K2O 150:60:60 Kg ha-1 can be recommended for South Bengal locations contributing to a yield of 5.10 t ha-1 as an Aman crop.
Keywords: Rice hybrids, nitrogen levels, wet season rice, yield, economics