Effect of zinc applications under different types of salinity in wheat

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dc.contributor.advisorSharma, Manoj Kumar
dc.contributor.authorSonia Rani
dc.date.accessioned2016-09-26T09:42:36Z
dc.date.available2016-09-26T09:42:36Z
dc.date.issued2014
dc.description.abstractTwo screen house experiments were conducted to study the relative tolerance of wheat (Var. KRL-210) and interactive effect of zinc with different types of salinity on wheat crop. In first experiment, the treatment consisted of two types (Cl- and SO4 -2 dominated) with the four levels 0, 4, 8 and 12 dS m-1 of salinity. In the second experiment, interactive effect of different zinc levels (0, 5, 10 and15 ppm) with chloride and sulphate dominated salinity was investigated on yield and uptake of wheat. Both the experiments were replicated thrice in a factorial completely randomized design and the desired types of salinity were created using chloride and sulphate salts of the Na+, Ca+ and Mg2+. Germination of wheat delayed was more in chloride dominated salinity at 8 and 12 dS m-1 as compared to sulphate dominated salinity. No effect at 0 and 4 dS m-1 in both types of salinity in germination. With the increasing salinity levels from 0 to 12 dS m-1 there was a decrease in the biomass, grain and straw yield of wheat. However, the magnitude of decrease in the wheat yield resulted from the increase in salinity. There was a decrease in mean grain yield of wheat from 9.12 to 6.41 g pot-1 and 9.41 to 7.17 g pot-1 in chloride and sulphate dominated salinity, respectively, as salinity levels increased from 4 to 12 dS m-1. The reduction in grain yield, biomass and chlorophyll ‘a’ and chlorophyll ‘b’ was more in case of chloride dominated salinity as compared to sulphate dominated salinity. The increased levels of Zn from 0 to 15 ppm in soil resulted in increase of both grain and straw yield by 34.1and 36.7 per cent, respectively, over non saline soil. The mean Zn uptake across all the salinity levels decreased from 93.95 to 68.05 μg pot-1 (27.6%) and 109.87 to 78.43 μg pot-1 (28.6%) in chloride and sulphate dominated salinity, respectively, in wheat plant at boot stage. Similarly, in wheat straw at maturity it decreased from 54.83 to 34.75 μg pot-1 (36.6%) and 61.89 to 43.81 μg pot-1 (29.2%) in chloride and sulphate dominated salinity, respectively. The decrease was prominent in case of Cu, Fe and Mn also across all the salinity levels. The mean ECe, water soluble Na+, Ca+, Mg2+, Cl- and SO4 -2 increased with increase in the salinity level from 0 to 12 dS m-1 across all the Zn levels and these increasing concentrations in soil affect the wheat crop. Availability of DTPA extractable Zn, Cu, Fe and Mn was decreased as the salinity levels increased from 0 to 12 dS m-1 and this affect can be reduced by increasing levels of Zn from 0 to 15 ppm. Therefore, Zn mitigates the effect of salinity.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/78776
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subSoil Science
dc.subjectZinc, Salinity, Chloride, Sulphate, Micronutrients, Wheaten_US
dc.these.typeM.Sc
dc.titleEffect of zinc applications under different types of salinity in wheaten_US
dc.typeThesisen_US
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