Influence of sulphur and plant growth regulators on yield, quality and nutrient uptake in summer peanut (Arachis hypogaea)

Abstract

A field experiment was carried out during summer 2014 in a medium black clayey soil at Instructional
Farm, Department of Agronomy, College of Agriculture JAU, Junagadh (Gujarat) to evaluate the
influence of sulphur and plant growth regulators on yield, quality and nutrient uptake in summer
peanut (Arachis hypogaea). Significantly higher pod and haulm yields was recorded due to application
of 20 kg S ha–1 by 21.6 and 12.9% over control, respectively. On the other hand, kernel, biological
and oil yields increased significantly up to 40 kg S ha–1 by 44.7, 24.2 and 54.6% over the control,
respectively. Significantly higher protein and oil contents in peanut kernels were recorded at 60 kg
S ha–1 over control and 20 kg S ha–1 and was at par with 40 kg S ha–1. Sulphur application up to 40 kg
ha–1 significantly increased total N, P and S uptake by peanut. Application of NAA @ 40 ppm twice
at 25 and 50 DAS significantly enhanced pod, haulm, kernel and biological yields by 33.2, 18.4, 42.8,
and 23.8% over control, respectively and was at par with GA3 @ 20 ppm twice at 25 and 50 DAS.
Application of GA3 @ 20 ppm twice at 25 and 50 DAS recorded the highest protein and oil contents,
oil yield, N, P and S uptake by peanut over rest of the treatments.