Vol. 10, Issue 5 (2021)

Author(s):
G Adilakshmi, Rajan Kumar, P Varalakshmi, Mohan Babyu YN and Karthika M

Abstract:
A field experiment was carried out at Crop Research Centre of Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar during Kharif (2018) in split plot design with three replications in order to evaluate the three different rice varieties at different moisture regimes. The treatments in main plot consisted of four moisture regimes i.e., M₁-AWD at 3 Days (Irrigation was applied at 3 days after disappearance of ponded water), M₂-AWD at 5 Days (Irrigation was applied at 5 days after disappearance of ponded water), M3-Saturation level till physiological maturity (Irrigation was applied at zero soil moisture potential) and M₄-10 % of moisture depletion (Irrigation was applied at 10 % moisture depletion of Field capacity) and in sub plot consisted of three varieties i.e., V₁-Rajendra Neelam, V₂-Abhishek and V₃-Rajendra Saraswati. The results revealed that N, P and K content in grain and straw of all the three varieties were not significantly influenced due to moisture regimes and with the varieties. The N, P and K uptake were significantly influenced by rice grain and straw at different moisture regimes and also with the different rice varieties. However, maximum value of N, P and K uptake by grain and straw were recorded with the moisture regime of M₁-AWD at 3 Days which was significantly superior to M₂-AWD at 5 Days and M₄-10% of moisture depletion but was found statistically at par with moisture regime of M3-Saturation level till physiological maturity. Among different rice varieties, maximum N, P and K uptake by grain and straw were recorded with V₁-Rajendra Neelam and it was significantly superior to V₂-Abhishek and V₃-Rajendra Saraswati.