TINGKAT PERKEMBANGAN DAN KESUBURAN TANAH DARI LAPUKAN BATUAN ULTRABASA PADA BEBERAPA TOPOSEKUEN DI SULAWESI TENGGARA
The study of soil fertility levels and development of weathering ultramafic rocks have been performed on several toposequence in Sulawesi Tenggara in Puriala Sub District of Konawe District and in Lasusua Sub District of Kolaka District from December 2010 until Juni 2011. The results showed that soi...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2011
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/90743/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=53009 |
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| Summary: | The study of soil fertility levels and development of weathering ultramafic
rocks have been performed on several toposequence in Sulawesi Tenggara in
Puriala Sub District of Konawe District and in Lasusua Sub District of Kolaka
District from December 2010 until Juni 2011.
The results showed that soils developed from ultramafic rocks weathering
low rainfall (torric) in Puriala have a more coarse texture (LS, SL, L, SiL, CL, C),
impervious container which was more shallow (20-90 cm), land of color tend to
be brown (7.5 YR), pH 6.8 to 7.6, from 0.57 to 0.93% C-organic, CEC 26.20 to
69.61 cmol (+) kg-1, the number of base from 11.90 to 15.86 cmol (+) kg-1, Fe-d
from 3.79 to 16.12%, Al-d from 0.14 to 1.65%, smectite clay minerals, sand
mineral hematite compared feldspar soils developed from ultramafic rocks
weathering high rainfall (udic) in Lasusua color tends to be more red (2.5 YR),
with a finer texture (SiCL, C) and impervious container deeper (70->150 cm), pH
6.1 to 7.0, 1.20 to 1.86% C-organic, CEC 11.29 to 31.60 cmol (+) kg-1, the
number of bases from 2.72 to 13.33 cmol (+) kg-1, from 21.62 to 27.04% Fe-d,
0.87 to 3.58% Al-d, gutit smectite clay minerals, sand mineral feldspar-magnetitehematite.
Soil weathering from ultramafic rocks with high rainfall experienced
base cations leaching was higher mainly characterized by high mobility of cations
with CEC and a lower base amount, and the accumulation of low mobility of
cations is characterized by high Fe-d and Al-d.
Level of soil development began from P2 (Entisol), P1 (Vertisol), L2
(Inceptisol), P3 (Inceptisol), L1 (Alfisol) and the last L3 (Oxisol) the most
advanced of soil is on the middle slope, the next is soil on summit, and the last is
soil on toeslopes. Soil with low rainfall in Puriala provable the weak soil genesis,
so have low capability and fertility characteristic, that due to more inhibiting
factors more than the high rainfall area in Lasusua. |
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