Department of Agronomy, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, India
*Corresponding author: manashibarman4@gmail.com
Online published on 18 October, 2017.
A field experiment was done during 2013 and 2014 to reduce the unnecessary vegetative growth of kharif groundnut through application of paclobutrazol (PBZ), a growth retardant and to study its impact on yield. The experiment was laid out in split-plot design with six treatments in main plot (PBZ @ 50, 100, 150, 200, 250 ppm and control) and three treatments in sub-plot (Single spraying at 30 Days after emergence (DAE), single spraying at 50 DAE and double spraying at 30 and 50 DAE) and replicated thrice. PBZ in different concentration had the positive response to reduce the plant height during later stages of growth. In case of time of application, significant variation in crop growth rate (CGR) was found before harvesting. Among different yield attributes, pod dry weight (g) plant−1 was increased upto 32% with increase in concentration of PBZ and upto 28% with time of application as compared to control and single application, respectively. PBZ @ 250ppm with double spraying remarkably augmented total kernel yield (Kg ha−1), harvest index as well as oil percentage of this crop and ultimately improved the net return: cost ratio.
Application of paclobutrazol reduced remarkable plant height of groundnut.
Kernel yield and oil% were increased significantly with double spraying of paclobutrazol@ 250ppm.
Groundnut, paclobutrazol, growth attributes, yield components, oil content, net returncost ratio
