Effect of irrigation and nitrogen management on water productivity and nutrient uptake of aerobic rice


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Authors

  • Swarnali Duary Centurion University of Technology and Management, Odisha, India
  • Kalipada Pramanik Palli Siksha Bhavana, Visva-Bharati, Sriniketan, Bolpur, West Bengal, India
  • Debasish Panda Palli Siksha Bhavana, Visva-Bharati, Sriniketan, Bolpur, West Bengal, India

Abstract

Water and nitrogen fertilizer are the two important inputs for rice cultivation. A field experiment was carried out in split plot design, with three water management treatments, irrigation at (i) 75 % Cumulative Pan Evaporation (CPE), (ii) 100% CPE, (iii) 125% CPE in the main plot, and four nitrogen management strategies, (i) 100% nitrogen applied through chemical fertiliser, (ii) 75% through chemical fertiliser + 2.5 t ha-1 vermicompost, (iii) 50% through chemical fertiliser + 5.0 t ha-1 vermicompost, and (iv) 25% through chemical fertiliser +7.5 t ha-1vermicompost in subplot. The grain yield, straw yield, water productivity, nutrient uptake and economics of aerobic rice were considerably affected by irrigation and nitrogen management. Crops receiving irrigation at 125% CPE had the highest grain yield (3618 kg ha-1), which was comparable to crops receiving irrigation at 100 % CPE. Regardless of irrigation and nitrogen management, the straw yield of aerobic rice ranged from 4127 to 5092 kg ha-1. The highest total NPK uptake by grain was recorded with nitrogen at 100 % N through fertiliser (N1), which was significantly greater than what was obtained from other nitrogen treatments and irrigation management at 100 % CPE (I100) and 125 % CPE (I125) was significantly better than irrigation at 75 % CPE (I75). Irrigation management at 125 % CPE yielded the highest gross return, net return, and B: C ratio of aerobic rice, which was comparable to 100 % CPE and 100 % N through fertiliser, 75 % N through fertiliser + 2.5 t ha-1 vermicompost, and significantly higher than other nitrogen treatments.

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Submitted

2022-04-02

Published

2022-04-02

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How to Cite

Effect of irrigation and nitrogen management on water productivity and nutrient uptake of aerobic rice. (2022). ORYZA-An International Journal of Rice, 59(1), 106-112. https://epubs.icar.org.in/index.php/OIJR/article/view/122966