• S. Ramesh
• G. Baradhan
• S. M. Sureshkumar
• S. Jawahar
• K. Suseendran

Field investigations were carried out at the Experimental Farm, Department of Agronomy, Faculty of Agriculture, Annamalai University during early samba (2013) and thaladi (2014) to study the Influence of gibberellic acid on productivity, nutrient uptake and post-harvest soil available nutrient status in lowland rice (Oryza sativa L.). The experiments comprised of seven treatments viz., T1 - Gibberellic acid @ 5 g ha-1, T2 - Gibberellic acid @ 10 g ha-1, T3 - Gibberellic acid @ 15 g ha-1, T4 - Gibberellic acid @ 20 g ha-1, T5 - Gibberellic acid @ 25 g ha-1, T6 - Triacontanol 0.05% EC @ 250 ml ha-1 and T7 - control. The treatments were conducted in randomized block design (RBD) and replicated thrice. Rice variety BPT 5204 was used as test variety in both the seasons of study. The effect of Gibberellic on yield of crop, nutrient uptake by the crop and nutrient availability status at end of the experimentation was critically studied under rice. The grain yield was strikingly impressive by Gibberellic @ 25 g ha-1 in both seasons. Among the treatments, Gibberellic @ 25 g ha-1 registered the higher nutrient uptake at harvest stage over other treatments and the control. The post harvest soil status of NPK was higher in control (T1). The least values was recorded in Gibberellic @ 25 g ha-1 (T5). Based on the above experimental results, it could be concluded that cultivation of rice with application of Gibberellic @ 25 g ha-1 was found to be an agronomically sound and ecologically safe practice for augmenting higher productivity of rice. Hence this can be recommended to the rice growing farmers of Tamil Nadu.

Influence of gibberellic acid (GA3) on productivity, nutrient uptake and post-harvest soil available nutrient status in lowland rice

"Influence of gibberellic acid (GA3) on productivity, nutrient uptake and post-harvest soil available nutrient status in lowland rice", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.670-675, January-2019, Available :http://www.jetir.org/papers/JETIR1901B87.pdf

"Influence of gibberellic acid (GA3) on productivity, nutrient uptake and post-harvest soil available nutrient status in lowland rice", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp670-675, January-2019, Available at : http://www.jetir.org/papers/JETIR1901B87.pdf