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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue Sep 2011, 32 (5)                                     Back


nstantaneous and historical temperature effects on a-pinene

Population dynamics of earthworms in relation to soil physico-chemical

parameters in agroforestry systems of Mizoram, India

 

Author Details

 

H. Lalthanzara

(Corresponding author)

Department of Zoology, Pachhunga University College, Mizoram University, Aizawl-796 001, India

e-mail: hzara.puc@gmail.com

S. N. Ramanujam

Department of Zoology, North Eastern Hill University, Shillong - 793 022, India

L. K. Jha

Department of Environmental Sciences, North Eastern Hill University, Shillong - 793 022, India

 

 

 

Publication Data

Paper received:

25 May 2010

 

Revised received:

01 October 2010

 

Accepted:

20 November 2010

 

Abstract

Earthworm population dynamics was studied in two agroforestry systems in the tropical hilly terrain of Mizoram, north-east India, over a period of 24 months, from July 2002 to June 2004. Two sites of agroforestry situated at Sakawrtuichhun (SKT) and Pachhunga University College (PUC) campus, Aizawl, having pineapple as the main crop, were selected for detail studies on population dynamics. Five of the total twelve species of earthworm reported from the state were recorded in the study sites. The density of earthworm ranged from 6 to 243 ind.m-2 and biomass from 3.2 - 677.64 g.m-2 in SKT.? Comparatively the density and biomass in PUC, which is at relatively higher altitude were lower with a range of 0 to 176 ind.m-2 and biomass from 0 - 391.36 g.m-2 respectively.? Population dynamics of earthworm was significantly correlated with rainfall and physical characters of the soil. Earthworm biomass was significantly affected by rainfall and moisture content of the soil. The influence of chemical factors was relatively less.

Key words

Biomass, Earthworm, Population dynamics, Rainfall, Soil, Agroforestry systems

 

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