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ThesisItem Open Access Growth and yield dynamics of rapeseed-mustard (Brassica) cultivars as influenced by nutrients management, irrigation and plant hormones(Punjab Agricultural University, Ludhiana, 2022) Gurdeep Singh; Angrej SinghThe field study was conducted at Research Farm, Department of Soil and Water Engineering, PAU, Ludhiana and University Seed Farm, Naraingarh, district Fatehgarh Sahib during rabi season 2017-18 and 2018-19. The soil at Ludhiana was low in organic carbon (0.37 %) and available nitrogen (172.4 kg ha-1), high in available phosphorus (23.1 kg ha-1), medium in available potassium (170 kg ha-1), while at Naraingarh, it was medium in organic carbon (0.55 %) and available nitrogen (295.7 kg ha-1), high in available phosphorus (24.3 kg ha-1) and medium in potassium (260.3 kg ha-1). Two experiments on rapeseed-mustard were conducted in split plot design with three replications each. In experiment I, main plot treatments consisted of four cultivars viz. GSC 7, PC 6, RLC 3 and PBR 357, while the subplot treatments consisted of six nutrients management treatments viz. RDF (Recommended dose of fertilizer), RDF + ZnSO4.7H2O, RDF + borax , RDF + ZnSO4.7H2O + borax, RDF + S and RDF + ZnSO4.7H2O + borax + S. In experiment II, main plots treatments comprised of irrigation levels viz. one irrigation, two irrigations and three irrigations and subplot treatments consisted of Control (water spray), Gibberellic acid (40 ppm), Gibberellic acid (80 ppm), Salicylic acid (50 ppm) and Salicylic acid (100 ppm). In experiment I, maximum plant height and dry matter accumulation (DMA) at harvest were recorded in PBR 357. Higher yield attributes and seed yield was recorded PC 6 and GSC 7 as compared to RLC 3 and PBR 357. Among the nutrient management treatments RDF + ZnSO4 + borax + S resulted in maximum vegetative growth and yield attributes and consequently seed yield during both the years at these locations. In experiment II, maximum plant height, DMA and yield was observed with three irrigations at these locations in both the years. However, maximum plant height, DMA and yield attributes were noted with the application of SA @100 ppm in both years at two locations. The maximum apparent water productivity and total water productivity was observed with two irrigations at Ludhiana and one irrigation at Naraingarh. The application of SA @ 100 ppm also resulted in maximum water productivity at both the locations in two years of study
