Changing dynamics of micronutrients in piedmont soil of Bangladesh

Authors : Md Mosharaf Hossain SARKER, Md JAHİRUDDİN, Abu Zofar Md MOSLEHUDDİN, Md Rafiqul ISLAM

Pages : 43-51

Doi:10.18393/ejss.642221

View : 38 | Download : 10

Publication Date : 2020-01-01

Article Type : Research Paper

Abstract :A study was aimed to delineate the micronutrient status, their change directive with time and relationship with other soil variables in piedmont soils of Bangladesh. Northern and Eastern Piedmont Plains insert ignore into journalissuearticles values(AEZ 22); is one of the 30 agro-ecological zones insert ignore into journalissuearticles values(AEZs); of the country whose bench mark status of soil micronutrient has been used for comparing with the present status. There is an indication of zinc insert ignore into journalissuearticles values(Zn); and boron insert ignore into journalissuearticles values(B); depletion to some extent after a decade of time whereas the very high fertility status of copper insert ignore into journalissuearticles values(Cu);, manganese insert ignore into journalissuearticles values(Mn); and iron insert ignore into journalissuearticles values(Fe); prevails as it was in the previous status. In general view, the micronutrient content of surface soil insert ignore into journalissuearticles values(0-15 cm); was higher than those of sub-surface soils insert ignore into journalissuearticles values(15-30 cm);. In surface soil clay content showed significant correlation with soil Zn insert ignore into journalissuearticles values(r=0.403**);, Cu insert ignore into journalissuearticles values(r=0.752**);, Fe insert ignore into journalissuearticles values(r=0.501**); and Mn insert ignore into journalissuearticles values(r=0.340**);. Cu content of soil exhibited positive relationship with all the soil parameters except soil pH and P content; there existed highly significant negative correlation of Cu with soil pH insert ignore into journalissuearticles values(r=-0.578**); and P insert ignore into journalissuearticles values(r=-0.420**);. The availability of Fe in soil was strongly related with soil clay content insert ignore into journalissuearticles values(r=0.501**);, soil pH insert ignore into journalissuearticles values(r=-0.686**); and organic matter content insert ignore into journalissuearticles values(r=0.527**);. In surface soil, Fe content influenced significantly with the content of Zn, Cu and Mn. Accordingly in sub-surface soil, positive significant interaction of Zn-Fe, Cu-Fe, Cu-Mn and Fe-Mn was observed. The message revealed from this study concerning nutrient depletion, and interactions among different soil parameters and nutrient elements will pave the way for efficient use of soil resources in a sustainable way. 
Keywords : Change directive, interaction, micronutrient, piedmont soil, status

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