Elemental Composition of Leaves - A Possible Predictor of Tree Survival on Rehabilitated Sodic Lignite Mine Spoils


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Authors

  • Praveen Kumar ICAR-Central Arid Zone Research Institute, Jodhpur 342003, India
  • Suresh Kumar ICAR-Central Arid Zone Research Institute, Jodhpur 342003, India

Abstract

Reclamation of sodic lignite mine spoils in arid zones by covering them with a layer of good quality soil before tree plantation is a recognized approach. This approach has evolved as scarcity of good quality irrigation water in the region limits the utility of conventional gypsum application. As the woody perennials planted at reclamation site grow, belowground growth of roots may expose them to the higher sodic conditions with time. Rehabilitation of the lignite mined area is an expensive proposition and mortality of planted trees at later stage can jeopardise the whole program. Therefore, changes in elemental composition in tree leaves planted at spoil vis-à-vis that at non-mined site were used to investigate reasons of their long term survival. Results showed that the species of trees that survived at spoils had higher concentration of most of the elements than those growing at non-mined site. Of these, P, K, Ca and Mg were more important as tree species having equal or higher concentration of either all or most of these elements in leaves after one year of growth vis-à-vis those at non-mined site survived for over three years. Thus difference in concentration of phosphorus, potassium, calcium and magnesium in the tree leaves, a year after plantation at spoil, vis a vis of trees at non-mined site can indicate their potential for long term survival on spoils.

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Submitted

2016-11-07

Published

2016-11-07

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Articles

How to Cite

Elemental Composition of Leaves - A Possible Predictor of Tree Survival on Rehabilitated Sodic Lignite Mine Spoils. (2016). Annals of Arid Zone, 54(1 & 2). https://epubs.icar.org.in/index.php/AAZ/article/view/62842