Vol. 12, Issue 2 (2023)

Author(s):
Pawar SL, Sankat KB, Ramani HR and Patel MC

Abstract:
An experiment was conducted for three years from 2017-18 to 2019-20 at Main Cotton Research Station farm, Navsari Agricultural University, Surat (Gujarat). The purpose of the experiment was to work out optimum dose of major nutrients for Bt cotton hybrid (G. Cot Hy-10, BG-II) and assess the plant nutrient content, uptake by cotton crop as well as fertility status of soil. The statistical design of the experiment was factorial RBD with treatments comprising of three levels of nitrogen (N1: 180, N2: 240 and N3: 300 kg/ha) and potassium (K1: 0, K2: 30 and K3: 60 kg/ha) and two levels of phosphorus (P1: 0 and P2: 40 kg/ha). Each treatment was replicated three times. Based on the results of the three years experiment, fertilizer levels of N and P were found to significantly increase the seed cotton yield of Bt. cotton hybrid. Nitrogen levels N3 being at par with N2 both increased seed cotton yield as well as lint yield. Among phosphorus levels, P2 gave higher seed cotton as compared to no application of phosphorus fertilizer. Nitrogen levels significantly influenced the N content in seed and P content in stalk, while P levels significantly influenced the N content in seed and P content in both seed and stalk. Total uptakes of N and P were significantly influenced by all fertilizer levels and total K uptake by N levels only. Application of nitrogen @ 240 kg N/ha applied in 5 equal splits at 30, 60, 75, 90 and 105 DAS with basal application of phosphorus (@ 40 kg/ha) was found economical for getting higher seed cotton yield, net income with improvement in soil fertility.