Relative Performance of Rice Varieties under Drip Irrigated Dry Direct-seeded and Flood Irrigated Transplanted Conditions
Krishnasree R K *
Department of Agronomy, College of Agriculture, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana, 500030, India.
K. Suresh
Department of Agronomy, O/o Controller of Examinations, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, Telangana, 500030, India.
Md. Latheef Pasha
Department of Agronomy, College of Agriculture, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana, 500030, India.
K. Pavan Chandra Reddy
ISHM, ARI, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, India.
Ch. Aruna Kumari
Department of Crop Physiology, College of Agriculture, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana-500030, India.
*Author to whom correspondence should be addressed.
Abstract
A field experiment was conducted to evaluate the performance of 3 different rice varieties (KNM-1638, JGL-24423 & DRR Dhan-42) under drip irrigated dry direct-seeded condition as well as conventionally flooded transplanted condition with 100 & 125% N. The experiment was performed in split-plot design with 3 varieties in the main plot and 2 levels of irrigation (1.0 Epan & 1.5 Epan) in combination with 2 doses of N (100 & 125% of RDF) in the sub-plot. An observation trial with these 3 varieties under transplanted condition with 100 & 125% N was taken up. The study was conducted during kharif seasons of 2022-23 and 2023-24 at College farm, College of Agriculture, Rajendranangar, Hyderabad, Telangana, India. In each variety, best performing irrigation level was found at 100% N & 125% N. Growth parameters, yield parameters & yield of best-performing treatments under dry direct-seeded (DDSR) condition was compared with conventionally flooded transplanted rice (CFTPR) with the same variety and same dose of N using one sample t-test. KNM-1638 recorded significantly higher yield at 5% level of significance under transplanted condition compared to dry direct-seeded condition both at 100% N (P=0.01) & 125% N (P=0.01). Grain yield was statistically comparable at 5% level of significance under dry direct-seeded and transplanted condition for JGL-24423 at 100% N (P= 0.18). However, at 125% N, transplanted rice recorded superior yields to that of direct-seeded rice at 5% level of significance (P = 0.01). DRR Dhan-42 registered comparable yields under direct-seeded and transplanted condition with 100 (P = 0.22) & 125% N (P = 0.07) at 5% level of significance. There observed 57-68% of saving in irrigation water in DDSR compared to CFTPR. Based on yield, economization of water and nitrogen, KNM-1638 is recommended for cultivation under transplanted condition with 100% N; whereas, JGL-24423 & DRR Dhan-42 can be successfully cultivated under dry direct-seeded condition with 100% N without yield penalty.
Keywords: Dry direct seeded rice, transplanted rice, irrigation water, grain yield, nitrogen