Is soil organic carbon a key-driven for sustainable agroecosystem in terrestrial semi-arid, Indonesia?

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MELINDA R.S. MOATA
AYDAM MEEL TAKALAPETA

Abstract

Abstract. Moata MRS, Takalapeta AM. 2021. Is soil organic carbon a key-driven for sustainable agroecosystem in terrestrial semi-arid, Indonesia?. Intl J Trop Drylands 5: 1-4. Agroforestry system has been proved as a better system for food security, especially during dry season in a tropical region. It is used as climate change adaptation and mitigation strategy. Therefore, the sustainability of this system becomes crucial for rural livelihood, especially in dryland areas. One indicator for sustainable agriculture system is the total amount and quality of the soil organic matter (SOM). The SOM, expressed as soil organic carbon (C-org) plays an important role in biogeochemical processes in terrestrial ecosystems. Therefore, this study focused on soil quality at three land uses (forest, dryland agriculture with less input, and agroforestry) under Inceptisol, Entisol, and Alfisol from 36 locations at dryland terrestrial ecosystem in West Timor-Indonesia. The results showed that all soils are dominated by clay and silt loam textures (54%) and neutral pH (83%) but still have very low SOM and C-org < 1% (48%). However, a mixed cropping system (agroforestry) provides a higher C-org compound (5% C-org) than other land uses (< 1% C-org). Carbon has a strong correlation with nitrogen (r=0.90, p= 0.0004), weak correlation with potassium (r= 0.51, p= 0,13) and correlation with phosphorus-P (r= 0.30, p = 0.40). The SOM in these terrestrial ecosystems has a moderate correlation with Cation Exchange Capacity (CEC) (r= 0,64, p = 0.04). It is indicated that most of the soil nutrients and CEC were influenced by SOM (C-org) except P (likely from mineral soil). It is a promising finding that the agroforestry system is a sustainable system for food security and climate change adaptation and mitigation where SOM could be key-driven for land productivity in the terrestrial ecosystem.

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References
Aldrik JM. 1984. Phase II Feasibility and Design Study NTT Livestock Development Project Indonesia. Volume III The Land Resources of West Timor. ACIL Australia Pty. Ltd.
Anonymous. 1997. Pengelolaan Sumber Daya Lahan Kering di Indonesia. Terjemahan dari Resource Management for Upland Areas in Southest Asia: An Information Kit. IIRR dan FAO. Jakarta. [in Indonesian]
Baldock JA, Skjemstad JO. 1999. Soil organic carbon/ soil organic matter dalam 'Soil analysis: an interpretation manual.' (Eds K Peverill, L Sparrow and DJ Reuter) pp. 159-170. (CSIRO Publising: Melbourne).
Barrett JE, Virginia RA, Lyons WB, McKnight DM, Priscu JC, Doran PTF, Wall AG, Moorhead DL. 2007. Biogeochemical stoichiometry of Antarctic Dry Valley ecosystems. Geophysical research112(G01010), 1-2.
Clapp CE, Hayes MHB, Simpson AJ, Kingery WL. 2005. Chemistry of soil organic matter. In 'Chemical processes in soils.' (Eds L Al-Amoodi, W Dick, A Tabatabai and D Sparks) pp. 1. Soil Science society of America, Inc: USA.
Cleveland C, Liptzin D. 2007. C:N:P stoichiometry in soil: is there a "Redfield ratio‘‘ for the microbial biomass? Biogeochemistry 85: 235-252.
Haynes RJ.,2005. Labile organic matter fractions as central components of the quality of agricultural soils: an overview. Adv Agron 85:221–268
Hudson, LN et al. 2014. The PREDICTS database: a global database of how local terrestrial biovariesity responds to human impacts. Ecol. Evol. 4: 4701–4735.
Hudson et al. 2015. Global effects of land use on local terrestrial biovariesity. Nature 520: 45–50 (02 April 2015) DOI:10.1038/nature14324
Kirkby CA, Kirkegaard JA, Richardson AE, Wade LJ, Blanchard C, Batten G. 2011. Stable soil organic matter: A comparison of C:N:P:S ratios in Australian and other world soils. Geoderma163, 197-208.
Kirkby CA, Richardson AE, Wade LJ, Batten GD, Blanchard C, Kirkegaard JA. 2013. Carbon-nutrient stoichiometry to increase soil carbon sequestration. Soil Biology & Biochemistry60, 77-86.
Knops JMH, Tilman D. 2000. Dynamic of soil nitrogen and carbon accumulation for 61 years after agricultural abandonment. Ecology 81: 88-89.
Macdonald LM, Baldock JA. 2010. Manipulating soil carbon and nutrients: advancing understanding of soil cycling using approches based on ecological stoichiometry. National Research Flagships, Sustainable Agriculture, CSIRO Land and Water, S. Aust./GRDC, Barton, ACT.
Moata, MRS, Smernik RJ, Doolette AL, McNeill AM, Macdonald LM. 2015. Improving sensitivity of solution 31P NMR analysis in Australian Xeralfs. Communications in Soil Science & Plant Analysis 46: 1034–1043.
Moata MRS, Doolette AL, Smernik RJ, McNeill AM, Macdonald LM. 2016. Organic phosphorus speciation in Australian Red Chromosols: Stoichiometric Control. 54 (1): 11-19/2016.
Moata MRS, Takalapeta A, Puay Y, Kollo O, Tlonaen C. 2018. Monitoring Kualitas Tanah di Lahan Kering sebagai Upaya Menunjang Ketahanan Pangan di Wilayah Semi Arid., Prosiding Seminar Nasional Pertanian Ke V. Pengelolaan Pertanian Lahan Kering Berkelanjutan untuk Menunjang Kedaulatan Pangan, Kupang 26 Oktober 2018. P. 46-52. ISBN : 978-602-64783-7-5. [in Indonesian]
Nur MSM. 2018. Peta Pengembangan Lahan Kering di Provinsi NTT. Makalah. Forum Ekonomi dan Bisnis tetang Pengembangan Lahan Kering di Prov. NTT. Bappeda NTT. 19 September 2018. [in Indonesian]
Ramesh T, Manjaiah KM, Mohopatra KP, Rajasekar K, Ngachan SV. 2015. Assessment of soil organic carbon stocks and fractions under different agroforestry systems in subtropical hill agroecosystems of north-east India.Agroforest Syst.,89:677–690. DOI 10.1007/s10457-015-9804-z.
Sinsabaugh RL, Lauber C, Weintraub MN, Ahmed B, Allison SD, Crenshaw C, Contosta AR, Cusack D, Frey S, Gallo ME, Gartner TB, Hobbie SE, Holland K, Keeler BL, Powers JS, Stursova M, Takacs-Vesbach C, Waldrop MP, Wallenstein MD, Zak DR, Zeglin LH. 2008. Stoichiometry of soil enzyme activity at global scale. Ecology Letters 11: 1252-1264.
Six J, Guggenberger G, Pautian K, Haumaier L, Elliot EL, Zech W. 2001. Sources and composition of soil organic matter fractions between and within soil aggregates. European Journal of Soil Science52(607-618).
Tian H, Chen G, Zhang C, Melillo JM, Hall CAS. 2010. Pattern and variation of C:N:P ratios in China‘s soils: a synthesis of observational data. Biogeochemistry 98: 139-151.
Yang Y, Luo Y. 2011. Carbon:Nitrogen stoichiometry in forest ecosystems during stand development. Global Ecology and Biogeography 20: 354–361.