Vol. 17 No. 1
Response of potato (Solanum tuberosum L.) to gibberellic acid and integrated potassium management
Author(s): A. SINGH AND G. S. CHINNA
Abstract: A field experiment was conducted with potato at student research farm, Department of Agriculture, Khalsa College Amritsar. Two factors having three and five levels, were replicated thrice in a factorial randomized block design. The treatments were control (G1), gibberellic acid (G2, seed application) and gibberellic acid (G3, foliar application) in factor A and factor B includes control of potassium (K1), 100 per cent potassium through a recommended dose of fertilizer (K2), integrated application of potassium from K-biofertilizer along with 75 per cent recommended dose of potassium (K3), integrated application of potassium from K-biofertilizer along with 50 per cent recommended dose of potassium(K4), K-biofertilizer only (K5). Results revealed that the foliar application and seed application of gibberellic acid significantly affected both growth parameters and yield parameters in potato except disease and pest incidence parameters. Maximum tuber yield was recorded under G3 (181.20 q ha-1) and G2 (176.27 q ha-1) treatments as compared to control (162.86 q ha-1). Both 100% RDF and 75% recommended dose of potassium + K-biofertilizer may be recommended for higher tuber yield and disease management under Amritsar conditions. B: C ratio of both G2 and G3 (1.20 or 1.28) and K3 or K2 treatment (1.46 or 1.58) was higher than other treatments also. No interaction between GA3 and IPM was found significant.
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