EFFECT OF FOLIAR APPLICATION OF PLANT GROWTH RETARDANTS ON GROWTH, YIELD AND YIELD ATTRIBUTING PARAMETERS OF SOYBEAN (Glycine max L.) MERRILL

TARUN KUMAR¹, R.K. SAMAIYA², YOGENDRA SINGH³, S.K. DWIVEDI⁴, K.C. MEENA⁵*
¹Department of Plant Physiology, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur 482004
²Department of Plant Breeding & Genetics, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur 482004
³Department of Plant Breeding & Genetics, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur 482004
⁴Department of Plant Physiology, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur 482004
⁵Department of Plant Physiology, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur 482004
* Corresponding Author : drkailashmeena06@gmail.com

Received : 07-07-2016     Accepted : 26-07-2016     Published : 24-10-2016
Volume : 8     Issue : 50       Pages : 2158 - 2162
Int J Agr Sci 8.50 (2016):2158-2162

Keywords : Soybean, Plant growth retardants, Yield contributing character, Foliar application
Academic Editor : Sheikhavandi Tarlan, Baruah Neelanjana
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

Plant growth regulators (PGRS) are known to improve physiological efficiency including photosynthetic ability of plants and offer significant role in realizing higher crop yields. In present study, field experiments were conducted at the Research Farm Dusty Acre, Department of Plant Breeding & Genetics, JNKVV, Jabalpur during kharif 2013. The experiment was laid out in RBD with three replications. The experiment consisted of 7 treatments comprised to different concentration of plant growth retardants viz., paclobutrazol (40SC 60ml, 75ml, 90ml and 23SC 105.6ml, 132ml) and Chlormequat chloride (50%SL 500ml). Observation on various growth, yield and yield attributing parameters in soybean were recorded. The leaf area index significantly increased up to 75 DAS and declined steadily towards maturity. The LAI (Leaf Area Index) and LAD (Leaf Area Duration) were found to be maximum in Cycocel (CCC) and were recorded to be lower in PBZ. Among the most important major yield attributing traits viz; number of flowers per plant, number of pods per plant, pod length, pod width, pod weight, 100 seed weight, seed yield, biological yield and harvest index were influenced by the foliar application of plant growth retardants