Ecology, Environment and Conservation Paper

EFFECT OF GROWTH REGULATORS ON PHYSTOLOGICAL AND YIELD PARAMETERS OF KHARIF MUNGBEAN (VIGNA RADIATA (L.) VIIIICZEK)

Pushp Sharma, Guriqbal Singh and T.S. Bains

Abstract

A field investigation was carried out to study the effect of plant growth substances on certain physiological and biochemical parameters of kharif (rainy season) mungbean. In these experiments foliar sprays of salicylic acid (10 and 20 ppm), napthylacetic acid (20 and 40 ppm) and sugar (2 and 5%) at 35 and 45 days after sowing were compared with water spray and no spray (control). Foliar application of growth regulators enhanced the soluble proteins, chlorophyll content, reducing sugars and nitrate reductase activity. Flower drop was less in the case of treated plants than the non-treated ones. Application of salicylic acid 10 ppm, and sugar 2% twice at 35 and 45 days after sowing gave significantly higher grain yield than the water spray or no spray. On an average, the increase in the grain yield was 12.2% and 13.6% with 2% sugar and 10 ppm SA respectively over no spray.