Analisis Perkembangan Tanah Metode Pelarutan Selektif Dengan Ekstraksi Ditionit Sitrat Bikarbonat, Ammonium Oksalat, Dan Pirofosfat Pada Andisol Puncak Gunung Sumbing Kabupaten Magelang

Abstract

Puncak Gunung Sumbing memiliki suhu relatif rendah yang mengakibatkan perkembangan tanah terhambat akibat mineral sulit terkristalisasi. Tujuan penelitian ini adalah mengetahui perkembangan Andisol di puncak Gunung Sumbing berdasarkan analisa pelarutan selektif. Sampel tanah diambil pada tanah terpilih kedalaman 20-30 cm (horizon illuviasi) kemudian di analisis di laboratorium. Analisis laboratorium dengan pelarutan selektif yaitu pirofosfat (Al dan Fe), oksalat (Al,Fe, dan Si) dan ditionit sitrat bikarbonat (Al dan Fe). Hasil penelitian menunjukkan bahwa Alp 0,6%, Fep 0,13%, Alo 3,05%, Feo 0,71%, Sio 0,78%, Ald 1,59%, Fed 1,34%, Alt 5,99%, Fet 3,69%, Ferihidrit 1,2%, Alofan 5,53%, Feo/ Fed 0,53%, Fek/ Fea 1,09%, Fek/ Fet 0,17%, Fed/ Feo 1,89%, Sio/ Alt 0,13 dan Alo+0,5Feo 3,4%. Perkembangan tanah masih rendah diakibatkan faktor suhu relatif rendah sehingga kristalisasi terhambat.

Retention And Availability of Andisol Soil Phosphorus in Monocultural and Policultural Crop Patterns in Ngablak and Getasan Subdistrict, Magelang and Semarang, Indonesia

“…2.43a Note : Numbers followed by letters that are not same indicate that there are real differences between factors (planting pattern and depth) in the 5% LSD test. crystallization at these locations is slow [15]. Based on the two properties above, it can be said that the soil in this research location is indeed Andisol soil.…”

“…Al and Fe humus can be formed as a result of the synthesis of humus compounds which can form chelates with Al and Fe oxides. Al and Fe humus will become cationic complexes that are not hydrolyzed so that the influence of dissolved oxide ions in the soil is decrease [15]. This humus also has potential to interfere the allophane formation process which is characterized by low allophane levels and acid soils, besides that the Fe-crystalline/Fe-Amorphous ratio will also be low [15].…”