Agroforestry Systems

, Volume 83, Issue 2, pp 107-119

First online:

Promoting native trees in shade coffee plantations of southern India: comparison of growth rates with the exotic Grevillea robusta

  • Cheryl D. NathAffiliated withFrench Institute of Pondicherry, UMIFRE CNRS-MAEE 21 Email author 
  • , Raphaël PélissierAffiliated withFrench Institute of Pondicherry, UMIFRE CNRS-MAEE 21IRD, UMR AMAP
  • , B. R. RameshAffiliated withFrench Institute of Pondicherry, UMIFRE CNRS-MAEE 21
  • , Claude GarciaAffiliated withFrench Institute of Pondicherry, UMIFRE CNRS-MAEE 21CIRAD – UPR B&SEF

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Traditional shade coffee plantations of Kodagu district, in the Western Ghats of southern India, harbor a high density and diversity of trees. Local farmers appreciate native biodiversity, but plantation economics and public policies drive them to gradually replace the original diversified cover with exotic shade trees such as Grevillea robusta, which grows fast and can be easily traded as timber. In order to identify and recommend native timber trees with fast growth rates, we compared the growth performance of four common native species against that of G. robusta, by fitting steel dendrometer bands on 332 shade trees. Results showed that in general G. robusta had the fastest growth rates, but large trees of the native Acrocarpus fraxinifolius had faster growth in the wet western side of the district. Computer projections of long term performance showed that most species were influenced by bioclimatic zone. Species-specific local environmental effects also occurred, including competition from coffee bushes for A. fraxinifolius, influence of aspect for G. robusta, and management block effects for Lagerstroemia microcarpa. Our results show that native species potentially could produce timber at rates equivalent to those of exotic species. However, as in many tropical countries, data on growth rates of native trees within mixed-cover plantations are scarce and this study underlines the urgent need to screen for fast-growing species. Such information provides a strong basis for recommending appropriate changes in public policies that would improve tree tenure security and encourage farmers to grow more native species.


Silver oak Bioclimatic zone Mixed effects model Topography Competition index Tropical