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2021 - 20222
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Subject: Agronomy × Author: Gurdeep Singh × Start date: 1980 ×
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    ThesisItemOpen 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 Singh
    The 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
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    ThesisItemOpen Access
    Effect of paddy straw mulching and irrigation on growth and productivity of gobhi sarson (Brassica napus L.)
    (Punjab Agricultural University, Ludhiana, 2021) Gurdeep Singh; Angrej Singh
    The present study entitled, “Effect of paddy straw mulching and irrigation on growth and productivity of gobhi sarson (Brassica napus L.)” was conducted during the rabi season of 2019-20 at the research farm, Department of Soil and Water Engineering, Punjab Agricultural University, Ludhiana and Krishi Vigyan Kendra, Muktsar. The soil of the experimental field was loamy sand and sandy loam at Ludhiana and Muktsar, respectively. The main-plot treatments included three levels of mulch i.e. no mulch (M0), paddy straw mulch @ 6 tonne ha-1 (M1) and paddy straw mulch @ 9 tonne ha-1(M2) and sub-plots treatments were four irrigation levels I1: Recommended schedule (4 WAS, end of Dec and end of Feb), I2: two irrigations at 6 and 10 weeks after sowing (WAS), I3: two irrigations at 6 and16 WAS and I4: three irrigations 6,10 and16 WAS). The experiment was laid in split plot design with four replications. Application of paddy straw mulching @ 6 t and 9 t ha-1 resulted in significant increase the growth parameters i.e. plant height, LAI and dry matter production in gobhi sarson as compared to no mulch application. The results showed that the application of paddy straw mulch @ 6 t ha-1 increased seed yield of gobhi sarson significantly to the tune of 9.9 and 5.4% for Ludhiana and Muktsar, respectively as compared to no mulch. Further increase in paddy straw mulch @ 9 t ha-1 resulted in marginal increase in seed yield. Among different irrigation levels maximum seed yield (24.1 q ha-1) produced under (I4) Irrigation level, was statistically at par with I1 at Ludhiana. However, at Muktsar, results showed that maximum seed yield (21.2 q ha-1) was recorded under recommended practice of irrigation schedule (I1) that was statistically at par with I3 and I4 irrigation levels. However, I2 irrigation level resulted in significant yield reduction to the tune of 10.1 per cent as compared to I4 level of irrigation at Ludhiana. Similarly, at Muktsar I2 irrigation level showed significant yield reduction of 9.0 per cent as compared to I1 level of irrigation. Quality parameters like protein and oil content were not influenced by mulching and irrigation levels at both the locations. The maximum water-use efficiency (9.9 and 7.1 kg ha-1mm-1) obtained under M2 mulch level at Ludhiana and Muktsar respectively. Among irrigation levels maximum water-use efficiency (9.9 and 6.9 kg ha-1mm-1) obtained under I2 irrigation level at Ludhiana and Muktsar.