Pertumbuhan dan Serapan P Bibit Kakao (Theobroma cacao L.) yang Diinokulasi FMA pada Berbagai Dosis Fosfat Alam Ayamaru Papua
| Main Authors: | Suparno, Antonius, Yahya, Sudirman |
|---|---|
| Format: | Article info eJournal |
| Terbitan: |
Agrotek
, 2010
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| Online Access: |
http://jurnal.unipa.ac.id/index.php/agrotek/article/view/163 |
Daftar Isi:
- The two factor-factorial experiment was set up in a Completely Randomized Design. The first factor was five levels of APR dosage: 0, 0.5, 1.0, 1.5, 2.0 g P2O5/seedling, and 2.0 g P2O5 SP36/seedling used as comparison; the second factor was AMF inoculants, consisting of without AM fungi, Manokwari indigenous AMF and Mycofer. F1 UAH cacao seeds from Coffee and Cacao Research Center, Jember, East Java was used and the seedlings were grown on Ultisol, acid soil from Jasinga soil with 17.03 me/100 g of exchangeable Al in 20 cm x 30 cm sized polybag. The seedlings were grown under 60% of shading net for the period of four months. In this study, AMF inoculation, proved being able to improve the beneficial use of APR application on increasing the growth of cacao seedlings. When the seedlings were inoculated with AMF, the increase of APR dosage resulted in linear increasing of shoot dry-weight as much as 50.14% and of P uptake 64.88%, while inoculation of Manokwari indigenous AMF could increasing the shoot dry-weight as much as 66.30% and P uptake 65.45%, and on the non-mycorrhizal seedling the shoot dry-weight was increased as much as 73.56% and P uptake 121.94%. On the APR dosage of 2.0 g P2O5/seedling as comparing to the non-inoculated seedling, inoculation AMF using Mycofer inoculants was found much more effective to increase the shoot dry-weight (127.55%) than using Manokwari indigenous AMF (95.97%), while P uptake increased 45.16% and 21.29%, respectively. Mycofer inoculants contained Gigaspora margarita, (INVAM-105) G. manihotis (INDO-1), G. etunicatum (NPI-126), dan A. tuberculata (INDO-2), while identification based on spore morphology found that Manokwari indigenous AMF were consisted of Acaulospora tuberculata Janos & Trappe., A. scrobiculata Trappe, and G. aggregatum Schenk & Smith.