Browsing by Author "Pradeep Singh"
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ThesisItem Open Access Effect of foliage cuttings and growth regulators on seed yield and quality in coriander (Coriandrum sativum L.)(CCSHAU, 2014) Pradeep Singh; Mor, V.S.Seed quality plays an important role in the crop establishment and overall performance of the crop. Keeping in view, the importance of quality seed, the experimental material for present research comprised of four genotypes of coriander viz. DH-5, DH-36, DH-228 and DH-246 were grown with three replication in factorial RBD to study the “effect of foliage cuttings and growth regulators on seed yield and quality of coriander”. The foliage cutting was taken to make different treatments i.e. C0 (without cutting), C1 (one cutting at 45 days after sowing) and C2 (two cuttings at 45 days and 60 days after sowing) and foliar application of plant growth regulators at 50 percent flowering were done in all cutting levels. The investigation resulted that number of foliage cuttings reduced the plant growth, seed yield and quality. The crop without cutting of foliage gave the maximum plant growth along with highest seed yield and quality which was followed by one cutting and lowest performance was observed after two cuttings. The application of NAA (50 ppm) at the 50 percent flowering after foliage cutting enhanced the plant growth, seed yield and quality followed by GA3 as compared to control (water). Among laboratory parameters standard germination, test weight and seedling length were best predictor of field performance as these parameters exhibited high positive correlation with field emergence. The genotype Hisar Anand (DH-5) was found best seed producing genotype. Whereas, Hisar Bhoomit (DH-228) was found dual purpose genotypes both for foliage and seed.ThesisItem Open Access Studies on impact of natural ageing and seed priming on seed quality in Indian mustard [Brassica juncea (L.) czern. & coss(CCSHAU, 2018) Pradeep Singh; Punia, R.C.The present study entitled “Studies on impact of natural ageing and seed priming on seed quality in Indian mustard. [Brassica juncea (L.) Czern. & Coss.]” was carried out in the Department of Seed Science and Technology at CCS Haryana Agricultural University, Hisar (Haryana) during the year 2015-16 and 2016-17. The experiments was laid out in factorial Complete Randomized Design (CRD) and Randomized Block Design (RBD) for laboratory and field parameters, respectively on three varieties of Indian mustard viz., RH 30, RH 9304 and RH 0406 with three seed lots of each variety. The present investigation was carried out in two different experiments to meet out the objectives of study. In the first experiment, three lots of different Indian mustard were studied for various seed physiological parameters viz., standard germination, seedling length, seedling dry weight, vigour index-I & II, viability test (Tz %), and accelerated ageing. All physiological parameters were decreased significantly with the advancement of natural ageing of seeds. All the biochemical parameters viz., peroxidase (POX), superoxide dismutase (SOD), dehydrogenase enzyme activity decreased significantly with passage of time, whereas, electrical conductivity of seeds leachates increased with the advancement of time. The field parameters viz., seedling emergence index and seedling establishment were also decreased significantly with the advancement of time whereas, mean emergence time increased with the passage of time. In the second experiment, six seed priming treatments viz., T0: Control, T1: hydro-priming followed by dry dressing with carbendazim (2g/kg), T2: Hydration with GA3 (50 ppm), T3: Hydration with KNO3 (0.5%), T4: Hydration with KH2PO4 (0.5%), T5: Biofertilizer (Azotobacter) were analyzed to identify the suitable priming treatment. Among various priming treatments „T2‟- hydration with GA3 @ 50 ppm followed by „T6‟-Biofertilizer performed best to enhance all the seed vigour and viability characteristics and to lower down the electrical conductivity of naturally aged seed lots of Indian mustard seeds. The seed quality improvement through seed priming was noticed more in marginal seed lot i.e. one year old seed lot. Among the different varieties, maximum enhancement was observed in RH-30 followed by RH-9304 whereas, minimum enhancement was observed in variety RH-0406 during the periodof study. In conclusion, the present study revealed that Indian mustard seed lose its viability and vigour with the advancement of storage time and seed priming with GA3 @ 50 ppm and Biofertilizer (Azotobacter) can be used as an effective tool to enhance vigour and viability of seed.