Comparative Study of Drip Irrigated Dry Direct Seeded Rice and Conventionally Flooded Transplanted Rice Productions

Krishnasree R K *

Department of Agronomy, College of Agriculture, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana, 500030, India.

K. Suresh

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

ARI, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana, 500030, 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 compare the growth, yield and water use in drip-irrigated aerobic rice and conventionally flooded transplanted rice. The experimental design was 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 recommended dose of fertilizers) in the sub-plot and replicated thrice. An observation trial with these 3 varieties under transplanted conditions with 100 & 125% N was taken up. The experiment was conducted during Kharif, 2022 & 2023 at College Farm, College of Agriculture, Rajendranangar, Hyderabad, Telangana, India. In each variety, the best-performing irrigation level was found at 100% N & 125% N. Best-performing treatments under dry direct-seeded (DDSR) conditions was compared with conventionally flooded transplanted rice (CFTPR) with the same variety and same dose of N for growth parameters, yield attributes & yield as well as water productivity using a one-sample t-test. A significantly higher root length was observed in direct-seeded rice compared to transplanted rice in all the 3 varieties; while panicle weight did not differ with establishment methods @ 5% level of significance. Number of unfilled grains & chaffy grain% was low in direct-seeded rice of DRR Dhan-42, while it did not differ statistically for JGL-24423 at 100% N. For KNM-1638, transplanted rice recorded a significantly lower number of unfilled grains & chaffy grain percentage at both 100 & 125%N. DDSR & CFTPR recorded comparable grain yields in DRR Dhan-42 @ 100 (P = 0.22) & 125% N (P = 0.07) & in JGL-24423 @ 100% N (P = 0.18). For KNM-1638, higher grain yield was reported in transplanted rice over dry direct-seeded rice at both 100 (P = 0.01) & 125% N (P = 0.01). A significantly higher harvest index was reported by transplanted rice @ 100% N in KNM-1638 (P = 0.02), whereas it did not differ statistically for JGL-24423 & DRR Dhan-42. Drip irrigated direct-seeded rice recorded 2-2.4 times higher water productivity & 2- 3 times lower water use compared to conventionally flooded transplanted rice. There is a 57-68% saving in irrigation water in DDSR over CFTPR. It can be concluded that drip irrigated dry direct-seeded rice saves a hefty amount of irrigation water without compromising yield depending on the variety. For saving irrigation water without compensating yield, drip irrigated dry direct seeding of paddy is recommended with 100% N in JGL-24423 & DRR Dhan-42.

Keywords: Drip irrigation, dry direct seeded rice, transplanted rice, flood irrigation


How to Cite

R K, Krishnasree, K. Suresh, Md. Latheef Pasha, K. Pavan Chandra Reddy, and Ch. Aruna Kumari. 2024. “Comparative Study of Drip Irrigated Dry Direct Seeded Rice and Conventionally Flooded Transplanted Rice Productions”. International Journal of Environment and Climate Change 14 (7):499-511. https://doi.org/10.9734/ijecc/2024/v14i74289.