Trends in Biosciences

Manganese fertilization under salinity stress is of main concern to be investigated, especially in arid and semi arid regions. Therefore, a pot experiment was conducted during rabi season (2014–15) in the screen house of Department of Soil Science, CCS HAU, Hisar. Results revealed a significant increased in yields, content, uptake of Mn in wheat grain and straw and Mn pools in soil with the application of graded level of Mn but decreased with the application of graded level of Cl-. The highest yields of wheat grain and straw were recorded with 25 mg Mn kg-1 and no addition of Cl- as soil application. In wheat plant, with increasing levels of Mn application was found to increased Mn content and its uptake while increasing level of Cl- application was found to decreased Mn content and its uptake. Maximum Mn uptake was recorded under treatment of 50 mg Mn kg-1 and no addition of Cl- soil application. Among various Mn fractions, the highest Mn concentration was found in RES fraction followed by MnOX>AFeOX> CFeOX > EX > CARB > OM fractions. Organic matter bound (OM) showed a very little amount of Mn content due to low content of organic carbon in experimental soil. Thus, the interactive effect of Cl and Mn results showed that Cl- application has antagonistic effect on yields, content, uptake of Mn by wheat and Mn pools in soil while Mn application is a good predictor of Mn availability in Mn deficient light texture soils.