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Impact of potassium on forest vegetation in south-west Bengal, India

Author Affiliations

  • 119, Raj Krishna Pal Lane, Kolkata – 700 075, India

Res. J. Agriculture & Forestry Sci., Volume 9, Issue (4), Pages 21-25, October,8 (2021)

Abstract

Forest patches of Bankura, Paschim Bardhaman and Birbhum districts of the south-west part of West Bengal are dominated by four timber tree species like Shorea robusta, Holarrhena antidysenterica, Buchanania lanzan and Acacia catechu where Shorea robusta is recorded the highest among them. Substrate soils of these forest floors are covered with Alfisol comprising aluminum and iron as main ingredients. Collected soil samples from the selected pedons in the study area revealed higher content of potassium ranging from 55.20 to 671.89kg/ha in comparison to nitrogen and phosphorus, the other two chief soil nutrients of the plants. Even a forest soil sample of the study area shows an exceedingly high value of 671.89kg/ha obtained in the result of the soil chemical parameters analysis using the standard method for potassium extract. Further, the dominant four timber tree species of the vegetation type of the forest floors in the study area revealed different values for the potassium content and those values of potassium splendidly not only classify the habitat for each individual species but restrict the range of potassium content for the individual plant species. Forest soils covered with Holarrhena antidysenterica (Kurchi) trees show higher values of potassium content ranging from 93.38 to 671.89kg/ha, in contrast, the substrate soils of the Sal forest show relatively lower values for potassium ranging from 55.2 to 397.04kg/ha though the Sal trees (Shorea robusta) are abundantly occurred in these forest patches dominating over the other vegetation.

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