STUDIES ON AGRONOMIC BIO-FORTIFICATION WITH MICRONUTRIENTS IN ONION (Allium cepa L.) SEED CROP

dc.contributor.advisorTHAKUR, ASHOK KUMAR
dc.contributor.authorDOGRA, RUPALI
dc.date.accessioned2017-09-27T07:05:52Z
dc.date.available2017-09-27T07:05:52Z
dc.date.issued2017-09
dc.description.abstractABSTRACT The present investigations entitled ‘Studies on Agronomic Bio-fortification with Micronutrients in Onion (Allium cepa L.) Seed Crop’ were carried out in two experiments at experimental farm and laboratory of Department of Seed Science and Technology, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan, HP during 2015-17. The seed crop of onion cv. Palam Lohit was sprayed with zinc, boron, molybdenum and their combinations. Foliar application of micronutrients was given as zinc sulphate, boric acid and sodium molybdate at a concentration of 5%, 1% and 0.05% respectively at 3 stages i.e. vegetative stage, prior to flowering and at seed set stage. The first experiment was conducted in the field, sprays of zinc @ 5% and boron @ 1% showed maximum values with respect to number of leaves per plant (12.67), leaf length (49.53 cm), plant height at final harvest (54.60 cm), number of umbel per plant (7.60), number of flower per umbel(465), number of seeds per umbel (386.67), seed yield (222.67 g per plot and 618.52 kg per ha), 1000 seed weight (3.97 g) and minimum for ovule to seed ratio (7.21) and days to bolting (113.43). Among the seed quality parameters, maximum germination (89.50%), seedling dry weight (10.50 mg), seed vigour index-I (1111.62), seed vigour index-II (939.60) were achieved with application of zinc and boron. In second experiment agronomically bio-fortified seeds were stored at ambient conditions for 9 months in the plastic boxes to study the seed quality during storage. The seed quality was tested at three months interval viz., immediately after harvest (i.e. zero month), third month, sixth month and ninth month of storage. Highest germination (83.50%), seedling length (10.72 cm), seedling dry weight (8.89 mg), seed vigour index-I (894.09) and seed vigour index-II (754.63) were observed in onion seeds bio-fortified agronomically with zinc @ 5% and boron @ 1%. Among the storage periods, freshly harvested seeds showed maximum values with respect to germination (83.50 %), seedling length (10.74cm), seedling dry weight (9.13 mg), seed vigour index-I (900.17), seed vigour index- II (763.72) and speed of germination (41.63). The germination (89.50%), seedling length (12.43cm), seedling dry weight (10.50 mg) seed vigour index-I (1111.62) and seed vigour index-II (939.60) were highest in the freshy harvested seed in which plant were sprayed with zinc @ 5% and boron @ 1%. In control, seed showed minimum germination percentage (70%), seedling length (6.12 cm) seedling dry weight (6.30 mg) and seed vigour index-I (504) and seed vigour index-II (441) after 9 months of storage. The micronutrient content of seed also increased with agronomic bio-fortification with zinc, boron and molybdenum. The highest zinc content (78 mg per kg) found in agronomically bio-fortified seeds with zinc @ 5%, highest boron content (2.02 mg per kg) found with boron @ 1% and highest molybdenum content (0.30 mg per kg) with molybdenum @ 0.05%. From the present studies, it can be concluded that onion seed crop sprayed with zinc @ 5% and boron @ 1% at vegetative stage, prior to flowering and at seed set stage resulted in better plant growth, yield contributing characters and seed yield and bio-fortified seeds improves seed quality characters like germination, dry weight and vigour in storage period.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810031869
dc.keywordsOnion (Allium cepa L.) Seed Crop,Agronomic Bio-fortification ,Micronutrientsen_US
dc.language.isoenen_US
dc.pages60+IIIen_US
dc.publisherUHF,NAUNIen_US
dc.subSeed Science and Technologyen_US
dc.subjectnullen_US
dc.themeOnion (Allium cepa L.) Seed Crop,Agronomic Bio-fortification ,Micronutrientsen_US
dc.these.typeM.Scen_US
dc.titleSTUDIES ON AGRONOMIC BIO-FORTIFICATION WITH MICRONUTRIENTS IN ONION (Allium cepa L.) SEED CROPen_US
dc.typeThesisen_US
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