Effect of Phosphorus, Sulphur and Gibberellic Acid on Growth, Root Nodules and Yield of Soybean [Glycine max (L.) Merrill]
Bahnu Pratap Ghasil
College of Agriculture, Agriculture University, Kota, Rajasthan, India.
Harphool Meena *
Agricultural Research Station, Agriculture University, Kota, Rajasthan, India.
. Manoj
Department of Soil Science and Agricultural Chemistry, SKNAU, Jobner, Jaipur, Rajasthan, India.
Rajendra K. Yadav
Agricultural Research Station, Agriculture University, Kota, Rajasthan, India.
Monika Choudhary
Department of Agronomy, Rajasthan College of Agriculture, Udaipur, Rajasthan, India.
Govind Kumar Yadav
Department of Soil Science and Agricultural Chemistry, SKNAU, Jobner, Jaipur, Rajasthan, India.
Dhuni Lal Yadav
Agricultural Research Station, Agriculture University, Kota, Rajasthan, India.
Shankar Lal Yadav
Agricultural Research Station, Agriculture University, Kota, Rajasthan, India.
R. K. Meena
College of Agriculture, Agriculture University, Kota, Rajasthan, India.
*Author to whom correspondence should be addressed.
Abstract
An experiment was conducted during kharif season 2020 at Instructional Farm, College of Agriculture, Ummedganj, Kota. The experiment comprised twenty-four treatment combinations, having four levels of phosphorus viz., 0, 20, 40 and 60 kg ha-1, three levels of sulphur viz., 15, 30 and 45 kg ha-1 and foliar spray of gibberellic acid viz., no spray and spray of GA3 @ 75 ppm laid out in sub-sub split-plot design with three replications. Results showed that application of 60 kg P2O5 ha-1 had significant effect on plant height, dry matter accumulation plant-1, branches plant-1 at 30, 60 DAS and at harvest, root nodules plant-1 and their dry weight at 45 DAS while root nodules plant-1 and their dry weight at 45 DAS andseed yield (1956 kg ha-1) over application of 40, 20 kg P2O5 ha-1 and control. Significantly higher seed yield (1956 kg ha-1) was recorded under application of 60 kg P2O5 ha-1 over application of 20 kg P2O5 ha-1 and control. However, it was found at par with application of 40 kg P2O5 ha-1. Application of 45 kg sulphur ha-1 had significantly higher plant height (cm) at 60 DAS and at harvest, dry matter accumulation (g plant-1) at 30, 60 and at harvest stages, branches plant-1 at 30, 60 and at harvest stage, number of root nodules and their dry weight (g) and seed yield (1742 kg ha-1) which was found at par with application of 30 kg sulphur ha-1 over 15 kg sulphur ha-1. Application of gibberellic acid @ 75 ppm as foliar spray gave significantly higher plant height (cm) at 60 DAS and at harvest stage, dry matter accumulation (g plant-1) at 60 DAS and at harvest, branches plant-1 at 30, 60 DAS and harvestand seed yield (1770 kg/ha) over control.
Keywords: Growth, root nodules, seed yield, phosphorus, sulphur, gibberellic acid