Vol. 7, Issue 4 (2019)
Water productivity, yield and quality of aerobic rice (Oryza sativa) under drip-fertigation in comparison with puddled-flooded rice in semi-arid India
Author(s): Padmaja Bhimireddy, Mallareddy Maduri, K Chandra Sekhar and D Vishnu Vardhan Reddy
Abstract: Increased water scarcity coupled with escalating pumping costs compels the farmers in India to opt for alternate production systems to flooded rice. Aerobic rice cultivation saves water but with yield penalty. Drip-fertigation (DF) has been proved to improve the crop, land, water and nutrient productivity in Agriculture. A field experiment was conducted at Warangal, Telangana State, India during 2011 and 2012 on a sandy loam soil to evaluate the performance and water productivity (WP) of aerobic rice with drip and N fertigation (120 kg ha-1) at three schedules i.e., 100% pan evaporation (PE) (DF100), 150% PE (DF150) and 200% PE (DF200) in comparison with puddled-flooded (PF) system, aerobic-rainfed (AR), aerobic with surface irrigation (ASI) at 1.5 IW/CPE ratio, all replicated four times. The results revealed that PF rice maintained superiority in growth parameters, yield components and yield (5.06 t ha-1) over aerobic rice. Grain yield was reduced by 45.8% in ASI rice mainly due to reduction (49%) in the filled spikelets per panicle compared to PF system. This yield gap was narrowed down to 15.2% in DF200 due to increased panicle production and filled spikelets attributed to consistently higher soil moisture between field capacity and saturation prevailed in DF200 which varied widely in ASI method. WP was doubled in DF200 with a water saving of 57% compared to PF rice while it was enhanced by 61% in ASI rice with 66% water saving. Physical quality parameters of rice did not differ due to flooded or aerobic cultivation.
Pages: 395-406 | 366 Views 68 Downloads
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How to cite this article:
Padmaja Bhimireddy, Mallareddy Maduri, K Chandra Sekhar, D Vishnu Vardhan Reddy. Water productivity, yield and quality of aerobic rice (Oryza sativa) under drip-fertigation in comparison with puddled-flooded rice in semi-arid India. Int J Chem Stud 2019;7(4):395-406.
