1Tamil Nadu Rice Research Institute, Tamil Nadu Agricultural University, Aduthurai-612 101, Tamil Nadu, India.
*Corresponding Author: P. Rajarathinam, Tamil Nadu Rice Research Institute, Tamil Nadu Agricultural University, Aduthurai-612 101, Tamil Nadu, India. Email: rajarathinam.p@tnau.ac.in
Field experiments were conducted at Annamalai University Farm during kharif seasons of three consecutive years from 2020–2022 to find out the effect of potassium and bio stimulants on growth and yield of dolichos bean.
The experiments were conducted in RBD and replicated thrice. The treatments viz., T1- Control (without foliar nutrition), T2- Foliar application of KNO3 @ 1%+panchagavya @ 3%, T3- Foliar application of KNO3 @ 1% + panchagavya @ 6%, T4- Foliar application of KNO3 @ 1% + seaweed extract @ 2%, T5- Foliar application of KNO3 @ 1% + seaweed extract @ 4%, T6- Foliar application of potassium humate @ 1% + panchagavya @ 3%, T7- Foliar application of potassium humate @ 1% + panchagavya @ 6%, T8- Foliar application of potassium humate @ 1% + seaweed extract @ 2% and T9- Foliar application of potassium humate @ 1% + seaweed extract @ 4%. The dolichos bean variety Arka Jay was used for this study.
The result of present investigation indicated that the growth and yield parameters viz., plant height, branches plant-1, pods plant-1, pod length and single pod weight were found to be superior in treatment T5 as compared to control. The higher yield (15.16 t ha-1) of dolichos bean was significantly improved due to application 1 % KNO3 + seaweed extract @ 4% (T5) followed by T4 and T1 over the control. The same treatment fetched the highest net return of Rs. 81626 ha-1 with a benefit cost ratio of Rs.1.79.
Bio-stimulants, Dolichos bean, Foliar nutrient, KNO3, Potassium humate
