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International Journal of Forestry Research
Volume 2014, Article ID 898494, 8 pages
http://dx.doi.org/10.1155/2014/898494
Research Article

Arbuscular Mycorrhizal Colonization Enhanced Early Growth of Mallotus paniculatus and Albizia saman under Nursery Conditions in East Kalimantan, Indonesia

1The United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan
2PT Berau Coal, Jalan Pemuda No. 40 Tanjung Redeb, Berau Regency, East Kalimantan 77311, Indonesia
3Faculty of Agriculture, Yamagata University, Tsuruoka 997-8555, Japan

Received 3 September 2013; Revised 30 October 2013; Accepted 4 November 2013; Published 28 January 2014

Academic Editor: Guy R. Larocque

Copyright © 2014 Dewi Wulandari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Forest over logging, forest fire, forest conversion, and opencast mining have promoted deforestation in Indonesia, and reforestation is needed immediately. However, reforestation is limited by low seedling quality and production, and slow seedling growth in nurseries. Native tropical tree and fast-growing species, Mallotus paniculatus and Albizia saman, are potential to promote the first rotation of reforestation. Arbuscular mycorrhizal (AM) fungi are known to promote nutrient uptake and plant growth. We examined the effects of two native AM fungi, Gigaspora decipiens and Glomus clarum, on the growth of M. paniculatus and A. saman seedlings under nursery conditions. At harvest, after six months, we determined AM colonization, shoot dry weight, and shoot N and P concentration. Approximately 90% and 50% of M. paniculatus and A. saman roots, respectively, were colonized by AM fungi, without any difference between the inoculation treatments. G. decipiens and G. clarum increased shoot height, leaf number, shoot dry weight, and shoot N and P uptake of both species. A positive correlation was observed between N and P uptake and shoot dry weight. These results suggest that AM fungi are effective in accelerating nutrient uptake and plant growth, which will, in turn, promote reforestation and sustainable forest timber production.