CD Skripsi

Variasi Biomassa Fosfor Mikroba Dan Aktivitas Fosfatase Tanah: Dampak Alih Fungsi Lahan Gambut Menjadi Perkebunan Sagu Di Riau

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Most of peatland in Riau have been changed for agricultural activities. Its conversion results in a change of vegetation type that interferes the P cycle in soil due to changing in microbial population and activity. This study aimed to analyze the impact of peatland conversion to sago plantations against soil physico-chemical characteristics, microbial P biomass, soil phosphatase activity, and the cells number of phosphate solubilizing bacteria. Soil samples were collected from seven different locations in the Lukun Village, Tebingtinggi Timur, Meranti District, Riau, namely natural forest (HA), sago plantation planted by 6 month- old sago (HSB), sago plantation with age of 7 years that was mixed with 5 years-aged rubber (HS + K), sago plantation with the age of 20 years (HS 20 TH), sago plantation with the age of 40 years (HS 40 TH), sago plantation with the age of 80 years (HS 80 TH), and sago plantation with the age 120 years (HS 120 TH). Soil physical-chemical characteristics were measured by following the standard method. Microbial P biomass was calculated using Chloroform fumigation extraction (CFE). Soil phosphatase activity was measured by using the colorimetric method and the cells number of phosphate solubilizing bacteria was determined by using the Total Plate Count method. Soil physical-chemical character varied with pH range of 5.63 to 6.50, temperature 28.25 to 31.25oC, humidity from 58.75 to 86.25%, dry weight of soil from 0.68 to 0.79 g, water content from 21.00 to 32.00%, and bulk density from 0.21 to 0.27 g/cm3. The highest microbial P biomass was found at HS 120 years (43.24 g PNP/g soil) and the lowest was at HS 20 (10.56 g PNP/g soil). The highest acid phosphatase activity was found at HS 40 (40.33 mol PNP/hr/g soil) and the lowest was at HSB (13.71 mol PNP/hr/g soil). The highest cell number of phosphate solubilizing bacteria was on HS 40 years (1.68×104 CFU/g soil) and the lowest was on HSB (0.12×104 CFU/g soil). Based on the data, it could be concluded that conversion of peat land into sago plantation influenced microbial P biomass and acid phosphatase activity, but did not affect the cell numbers of phosphate solubilizing bacteria.
Key words: Land use, sago plantations, microbial P biomass, acid phosphatase, phosphate solubilizing bacterial

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

03 04. 116 (0019)

Penerbit

Pekanbaru : Universitas Riau - FMIPA - Biologi., 2016

Deskripsi Fisik

xv, 60 hlm.: ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

03 04. 116 (0019)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

BIOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

Dewa

Versi lain/terkait

Lampiran Berkas

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