Abstract
The aims of this research are to apply Senaru forest rhizosphere on Kabupaten Lombok Barat West Nusa Tenggara as Mycorrhiza inoculants for Gyrinops versteegii germination and growth. Rhizosphere sample was taken from ten sampling spot on Senaru forest between Latitude: 08o18.808’ S – 08o19.174’ S and Longitude: 116o24.138’ E – 116o24.181’E. This study employed Factorial Experiment Design with 2 Factor including: Medium Composition (M) and Mychorizza Inoculant (I). There were 5 media composition: M1 (sand), M2 (soil:sand = 1:2), M3 (soil:sand = 1:1), M4 (soil:sand = 2:1), M5 (soil). There were 2 types of Inoculation: I1 (without inoculant) and I2 (innoculant from senaru Rhizosphere). Growth parameters observed in this study were: germination percentage, stem length, stem diameter and root colonization. Germination percentage of G. versteegii seeds in all growth media are below 60 % which could be classified as low germination rate. Also germination from media without rhizosphere is higher than germination from media with rhizosphere. On the other hand, G. versteegii growth on rhizosphere media is slightly higher than growth of G. versteegii on media without rhizosphere based on stem diameter and length measurement. It tends that medium composition with higher sand proportion tended to gives better germination and growth rate of G. verteegii. Myorrhiza colonization on G. versteegii root was higher in media with rhizosphere addition. It could be concluded that Application of Senaru rhizosphere containing Mycorrhiza increases G. versteegii growth but not its germination percentage. This research enrich knowledge in biological science about asociation of mycorrhiza with G. versteegii especially on its growth and germination
Highlights
Gyrinops versteegii is one of endemic agarwood species to Lombok Island (Mulyaningsih & Yamada, 2007; Subehan et al, 2005). This species has a high economic value that was expected could be a good solution for poverty problem in Lombok (Siddik, 2010). Wild type of this species was in vulnerable status due to overexploitation and made this species listed as CITES Appendix II (Schmidt, 2011)
Samples were taken from depth less than 20 cm of rhizosphere. This sampling depth is an ideal location for mycorrhizal sampling and ideal place for growth medium sampling due to high of mineral nutrition (Liu et al, 2016)
It could be concluded that application of Senaru rhizosphere containing Mycorrhiza increase G. versteegii growth based on stem height
Summary
Gyrinops versteegii is one of endemic agarwood species to Lombok Island (Mulyaningsih & Yamada, 2007; Subehan et al, 2005). This species has a high economic value that was expected could be a good solution for poverty problem in Lombok (Siddik, 2010). Cultivation could improve agarwood production from Gyrinops versteegii species as a main non-timber commodity of Lombok Island. Growth media for G. versteegii should be designed as similar as its natural environment to ensure that growth media contains good nutrition. After natural growth media already been set up, improvement by adding substance that could give beneficial effect for G. versteegii growth. One of that beneficial substances is Mycorrhiza that could be a good soil fertility indicator (Syib’li et al, 2013)
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