NDLI: Virtual trees and light capture: a method for optimizing agroforestry stand design

Content Provider	Springer Nature Link
Author	Leroy, Céline Sabatier, Sylvie Wahyuni, vi Sari Barczi, Jean François Dauzat, Jean Laurans, Marilyne Auclair, Daniel
Copyright Year	2009
Abstract	In agroforestry systems, the distribution of light transmitted under tree canopies can be a limiting factor for the development of intercrops. The light available for intercrops depends on the quantity of light intercepted by tree canopies and, consequently, on the architecture of the tree species present. The influence of tree architecture on light transmission was analysed using dynamic 3D architectural models. The architectural analysis of Acacia mangium and Tectona grandis was performed in Indonesian agroforestry systems with trees aged from 1 to 3 years. 3D virtual trees were then generated with the AmapSim simulation software and 3D virtual experiments in which tree age, planting density, planting pattern and pruning intensity varied were reconstructed in order to simulate light available for the crop. Canopy closure of trees was more rapid in A. mangium than in T. grandis agroforestry systems; after 3 years the quantity of light available for A. mangium intercrops was three times lower than under T. grandis. Simulations with A. mangium showed that practices such as pruning and widening tree spacing enable to increase the total transmitted light within the stand. On T. grandis, modification of the tree row azimuth resulted in changes in the spatial and seasonal distribution of light available for the intercrops. These results are discussed in terms of agroforestry system management.
Starting Page	37
Ending Page	47
Page Count	11
File Format	PDF
ISSN	01674366
Journal	Agroforestry Systems
Volume Number	77
Issue Number	1
e-ISSN	15729680
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-05-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Acacia mangium Tectona grandis Agroforestry Light interception Plant architecture Simulation 3D virtual plant Agriculture Forestry
Content Type	Text
Resource Type	Article
Subject	Forestry Agronomy and Crop Science

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