AGROEKOSISTEM KOPI BERKELANJUTAN YANG MEMPERTAHANKAN KERAGAMAN BAKTERI TANAH

• Main Authors: , RUSDI EVIZAL, MS, , Prof. Dr. Ir. Tohari, M.Sc.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2011
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/90245/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=52580
• Institution: Universitas Gadjah Mada

Shade trees in coffee agro-ecosystems provide ecological benefits such as soil conservation, biodiversity, nutrient cycling through litter fall, and N fixation by nodules of legume shade trees. Soil bacteria as part of belowground biodiversity plays an important role on ecosystem functioning. The aim of this research was to examine coffee agro-ecosystems with high sustainability index that sustain soil bacteria diversity. The research was conducted through survei and experimental petak of coffee agro-ecosystems, at benchmark site of Conservation and Sustainable Management of Below-Ground Biodiversity (CSM-BGBD), in Sumberjaya Subdistrict, West Lampung, Indonesia, during 2007-2010. Types of coffee agroecosystems to be examined were Coffea canephora with shade trees of Gliricidae sepium, Erythrina sububrams, Michelia champaca, and sun coffee (without shade tree). Two plots were 4-5 years old coffee plot and a quassy experiment plot of 15-16 years old coffee. Diversity of soil bacteria was evaluated based on C source and DNA finger printing of total soil bacteria and legume nodulating bacteria. Sustainability of coffee agroecosystems was assessed based on ecological variables and economic reliability. The main conclusion of the research was that legume shaded coffee agroecosystems had high sustainability indeces and able to sustain soil bacteria diversity. The detail conclusions were: (1) Landuse change from forest to agroecosystems decrease diversity of soil bacteria. Coffee agro-ecosystems were able to sustain soil bacteriadiversity