DAMPAK PERUBAHAN PENGGUNAAN LAHAN  DI UB FOREST TERHADAP KARBON BIOMASSA MIKROBA DAN TOTAL POPULASI BAKTERI

Irma Ardi Kusumawati; Cahyo Prayogo

doi:10.21776/ub.jtsl.2019.006.1.15

Authors

Irma Ardi Kusumawati
Cahyo Prayogo Jurusan Tanah Fakultas Pertanian Universitas Brawijaya

DOI:

https://doi.org/10.21776/ub.jtsl.2019.006.1.15

Keywords:

microbial biomass carbon, land use, bacterial population, organic carbon, forest

Abstract

UB Forest is one example of forest ecosystems that are closely related to carbon cycle. However, the change of use of forest land into agricultural land in the forest can cause a negative impact on the environment, including reduced carbon reserves and decrease soil fertility, indicated by the reduced population of microbial activity and soil macrofauna. This study was aimed to explore effects of lang use change on microbial biomass and bacteria and bacterial population in the UB forest. The observation plot was determined based on land use, i.e., MK (mahogany 40 years and coffee 2-4 years), PK1 (pine 20 years and coffee 4-6 years), PK2 (pine 30 years and coffee 2- 4 years), PS (pine 40 years and cabbage), PM (pine 20 years and shrubs), MT (mahoni 40 years and taro), PK4 (pine 40 years and coffee 3-5 years) PK3 (pine 35 years and coffee 5-8 years). Observations were repeated 3 times, resulting in 24 plots. The extent of land area observed was 20 m x 20 m, including there was litter trap of 1 m x 3 m for observation of litter input dynamics. Vegetation observations and analyzes included in-situ litter weight, dry weight of litter per two weeks, dry weight of understorey, and polyphenol and lignin contents. Soil sampling was collected for analyses of C-organic, pH, microbial biomass, and total population of bacteria. The results showed that the highest values of microbial biomass carbon and total population of bacteria was found on PK3 land. The high microbial biomass carbon of 55,48 mg / kg^-1 and total population of bacteria of 10.1 x 10^-6 cfu/ml^-1 had positive correlation and are influenced by litter input, understorey, C-organic content, soil pH, and litter quality in the form of polyphenols and lignin.

References

Arief, A. 2001. Hutan dan Kehutanan. Kanisius.

Bot, A. and Benites, J. 2005. The Importance of Soil Organic Matter: Key to Drought-Resistant Soil and Sustained Food and Production. FAO Soils Bulletin. Food And Agriculture Organization of The Nited Nations. Rome.

Cahayanigtyas, W.P dan Sumantri. 2012. Pengaruh penambahan biochar limbah pertanian dan pestisida pada inkubasi tanah inceptisol untuk menekan emisi gas metana sebagai gas rumah kaca. Jurnal Teknologi Kimia dan Industri 1(1):521-527.

Catherine, N.G., Vanlauwe, Palm, C.A. and Cadish, G. 2004. Chemical characterisation of a standart set of organic materials. Modelling Nutrient Management in Tropical Cropping System. 48-53.

Fang, X., Wang, Q, Zhou, W., Zaho, W., Wei, Y., Niu, L. and Dai, L. 2014. Land use effects on soil organic carbon, microbial biomass and microbial activity in changbai mountains of Northeast China. Chinese Geographical Science 24(3): 21-28.

Ginoga, K., Luliana, C.W., Mega, L., Deden, D. dan Nunung, P. 2004. Kajian kebijakan mekanisme pembangunan bersih di Indonesia. Jurnal Sosial Ekonomi Kehutanan 1 (1): 1-17.

Guillaume, T., Maranguit, D., Murtilaksono, K., Kuzyakov, Y. 2016. Sensitivity and Resistance of Soil Fertility Indicators to Land-Use Changes: New Concept and Examples From Conversion of Indonesian Rainforest to Plantations. Ecological Indicators. Elsevier Ltd.

Hairiah, K. 2007. Perubahan Iklim Global: Neraca Karbon di Ekosistem Daratan.

Jurusan Tanah Fakultas Pertanian Universitas Brawijaya. Malang.

Palm, C.A. dan Sanchez, P.A. 1991. Nitrogen release from the leaves of sometropical legumes as affected by their lignin and polyphenolic contents. Soil Biology and Biochemistry 23, 83-88.

Vance, E.D., Brookes, P.C. and Jenkinson, D.S. 1987. An extraction for measuring soil microbial biomass C. Soil Biology and Biochemistry 19: 703 â€“ 707.

Woo, H.R.., Hyo, J.K., Hong, G.N. and Pyung, O.L. 2013. Plant leaf senescence and death â€“ regulation by multiple layers of control and implications for aging in general. Journal of Cell Science 126(21): 121-128..

Yang, Z., Li, H., Bai, J. 2015. Effects on Soil Organic Carbon and Microbial Biomass Carbon of Different Tillage. International Conference on Circuits and Systems. China.

Yulnafatmawita, Adrinal dan Arief. 2011. Pencucian bahan organik tanah pada tiga penggunaan lahan di daerah hutan hujan tropis super basah pinang-pinang Gunung Gadut Padang. Jurnal Solum 8(1):34-42.