Effect of nitrate and ammonium ratios on physiological and quality attributes of hydroponically grown leafy vegetables

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dc.contributor.advisorBedi, Seema
dc.contributor.authorRatnesh Kumari
dc.date.accessioned2019-12-14T04:50:38Z
dc.date.available2019-12-14T04:50:38Z
dc.date.issued2019
dc.description.abstractThe effect of variable NO3 -to NH4 + ratios in the nutrient solution was evaluated on growth, nutritional quality and yield attributes of hydroponically grown leafy vegetables. Spinach (cv. Punjab Green), Coriander (cv. Punjab Sugandh) and Lettuce (cv. Iceberg) grown under substrate hydroponics with intermittent supply of water and nutrients. Simultaneously crop was raised in open field by conventional practices. Crop was sown on three dates viz., October (main season) and February and July (off-season) respectively. N was supplied in variable ratios of NO3 - to NH4 + viz., 100:0 (T1), 75:25 (T2), 50:50 (T3), 25:75 (T4), 0:100 (T5) respectively, keeping total N content constant. Fresh foliage was harvested 3 times in each season from each respective treatment at 30 days interval starting from date of sowing. At each harvesting, growth (fresh and dry biomass of shoot and root, plant height, leaf area and total yield per plant), quality parameters (total chlorophyll, carotenoids, soluble sugars, starch, soluble proteins, free amino acids and proline) and antioxidant enzyme activities (SOD, CAT, and POD) were determined. During all the three seasons, the yield was significantly more in hydroponically than open field sown crop. Under substrate hydroponics, maximum yield was obtained in the plants provided with nutrient solution T2 (NO3 - : NH4 +:: 75:25) and also had higher values of quality parameters and highest antioxidants activities than the open field crop. It is suggested that NO3 - to NH4 + ratio of 75:25 improve the growth, antioxidants activity, quality attributes and is thus most suitable for leafy vegetables growth under substrate hydroponics.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810137686
dc.keywordsAmmonium, Coriander, Lettuce, Nitrate, Proline, Quality, Spinachen_US
dc.language.isoenen_US
dc.pages73en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemEffect of nitrate and ammonium ratios on physiological and quality attributes of hydroponically grown leafy vegetablesen_US
dc.subBotanyen_US
dc.subjectnullen_US
dc.themeEffect of nitrate and ammonium ratios on physiological and quality attributes of hydroponically grown leafy vegetablesen_US
dc.these.typePh.Den_US
dc.titleEffect of nitrate and ammonium ratios on physiological and quality attributes of hydroponically grown leafy vegetablesen_US
dc.typeThesisen_US
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