Response of varieties under high and low input management in semi-dry rice ecosystem

 

Senthil Kumar G*, CR Chinnamuthu and K Ganesamurthy

 *Assistant Professor (Agronomy), Department of Rice, Tamil Nadu Agricultural University, Coimbatore – 641 003, Tamil Nadu, India.

* Corresponding author E mail: senthilkolathur@gmail.com

 Volume 14(1), 2021            Click here for Pdf           

Received: 8th April 2021; Accepted: 29th May 2021

Abstract

 

A field experiment was conducted during Rabi, 2020-21 at Tamil Nadu Agricultural University, Coimbatore, to study the response of varieties with high and low nutrient levels under semi-dry rice system. The experiment was laid out in split plot design with varieties in main plot viz., Anna 4, PMK 3, TKM 12, CO 51, CO 53 and three graded nutrient levels in sub-plot viz., 75 per cent recommended dose of fertilizer (60:20:30 kg NPK/ha), 100 per cent recommended dose of fertilizer (75:25:37.5 kg NPK/ha) and 125 per cent recommended dose of fertilizer (90:30:45 kg NPK/ha). The results revealed that, among the different varieties evaluated under semi-dry ecosystem, CO 53 showed higher grain yield on par with Anna 4. Among the nutrient levels, 125 per cent recommended dose of fertilizer (RDF) recorded higher grain yield at par with 100 per cent RDF. From this study it can be concluded that, short duration variety CO 53 and Anna 4 is best suitable under semi-dry system with 100 per cent recommended dose of fertilizer (75:25:37.5 kg NPK/ha) in Tamil Nadu.