Browsing by Author "Sourabh"
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ThesisItem Open Access Improving seed germination by scarification treatments in guava (Psidium guajava L.)(CCSHAU, 2015) Sourabh; Sharma, J.R.The present investigation entitled “Improving seed germination by scarification treatments in guava (Psidium guajava L.)” was carried out at experimental orchard, Department of Horticulture, CCS Haryana Agricultural University, Hisar during the year 2014-15. Guava seeds in hold physical dormancy due to hard seed coat which can be overcome by use of appropriate scarification method for appropriate duration. There were three scarification methods i.e. water soaking (for 24, 48 and 72 hours), hot water soaking (at 70, 80, 90 and 100ºC) and sulphuric acid soaking (at 10, 20, 30, 40 and 50 % dilution). Duration for hot water soaking and sulphuric acid soaking was kept as quick dip (5 seconds), 1 minute and 3 minutes. Various parameters like germination per cent, mean germination time and days to emergence of seedling were positively affected by all the scarification treatments. All these treatments significantly decreased mean germination time and days to emergence of seedling. Hot water soaking at 80ºC for 1 minute improved germination and resulted in maximum seedling length (6.03 cm) in laboratory. Water soaking also significantly improved germination of guava seeds over control. Among all the scarification methods and durations used, treatment of guava seeds with 20 per cent sulphuric acid for 3 minutes was judged best with maximum germination per cent , minimum days to emergence and minimum mean germination time , seed vigour index and girth of seedlings. However, the results of quick dip 30 per cent sulphuric acid were at par with the best treatment. Seeds treated with higher sulphuric acid concentrations or soaked in hot water of higher temperature showed poor germination as well as poor growth. Seeds without any scarification treatment also showed poor germination.ThesisItem Open Access Influence of silicon on sheath blight of rice ( Rhizoctonia solani )and their relationship on morphophysiological and yield traits under drought stress(Jawaharlal Nehru Krishi Vishwa Vidyalaya Jabalpur (Rewa), 2021) Sourabh; S.K. TripathiThesisItem Open Access Integrated nutrient management studies in guava (Psidium guajava L.) cv. Hisar Surkha(CCSHAU, 2019) Sourabh; Sharma, J.R.The present investigation entitled “Integrated nutrient management studies in guava (Psidium guajava L.) cv. Hisar Surkha” was carried out at experimental orchard, Department of Horticulture, CCS Haryana Agricultural University, Hisar during 2017-18 and 2018-19. Integrated soil application of biofertilizers consisted of Azotobacter and PSB in combination with vermicompost and FYM applied with 50%, 75% and 100% RDF in a RBD with three replications by taking one replication per plant on 4-year-old guava plants. 100% RDF + vermicompost + Azotobacter + PSB proved most effective in improving growth parameters namely tree height, trunk girth, tree volume, fruit set, fruit retention and yield parameters viz. average fruit weight, number of fruits per tree and fruit yield per tree which was found at par with 100% RDF + FYM + Azotobacter + PSB. Number of seeds per fruit and weight of seeds per fruit was not significantly affected by different treatments. However, fruit quality parameters specifically TSS, acidity, TSS:Acid ratio, vitamin C content, pectin content, total sugars, reducing sugars and non-reducing sugars were improved with 100% RDF + vermicompost + Azotobacter + PSB. Shelf life of fruits increased with integrated use of 100% RDF with vermicompost and biofertilizers. Similarly, improved leaf N and P content; soil N, P content along with soil microbial biomass in terms of Azotobacter and PSB population was found with 100% RDF + vermicompost + Azotobacter + PSB. However, no significant effect was observed on leaf micronutrient content (Zn, Fe, Cu and Mn), soil pH, EC, organic carbon and available K.