RESPIRASI KARBONDIOKSIDA TANAH PADA TOPOSEKUEN BUKIT KARST GUNUNGSEWU GUNUNG KIDUL
DOI:
https://doi.org/10.31764/geography.v9i2.5154Keywords:
Toposequence, Soil Properties, CO2 RespirationAbstract
Abstrak: Aktivitas dan konsentrasi karbondioksida (CO2) di dalam lapisan tanah permukaan ditentukan oleh proses respirasi akar dan dekomposisi organik. Sementara keberadaan material sebagai media respirasi dan dekomposisi ditentukan oleh posisi topografi yang memiliki variasi lereng. Penelitian ini bertujuan untuk mengetahui hubungan sifat tanah dengan respirasi karbondioksida tanah berdasarkan pada toposekuen bukit karst. Penelitian dilaksanakan di bukit karst bagian atas dari mulut Gua Gilap Dusun Klumprit Desa Kenteng Kecamatan Ponjong Kabupaten Gunungkidul. Lokasi titik sampel diambil pada suatu profil lereng dari puncak bukit, lereng bagian tengah, dan pada lereng kaki. Hasil menunjukkan terjadinya korelasi antara respirasi karbondioksida (CO2 Respiraton)dengan sifat tanah hanya pada lereng atas. Hubungan korelasi positif sangat kuat terjadi antara kandungan, bahan organik (organic matter), carbon organik (organic carbon), and berat jenis (specific density) dengan hasil CO2 Respiratonpada lereng atas. Sebaliknya terjadi korelasi negatif yang kuat antara kadar lengas (moisture) dengan CO2 Respiratonpada lereng atas. Terjadinya korelasi positif antara variabel organic matter, organic carbon, dan Specific density dengan laju CO2 Respiraton di lereng atas karena sampling pada Shafts. Terjadinya korelasi negatif moisture disebabkan rendahnya kandungan carbondioksida pada air hujan sebagai pengimbuh.
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Abstract:Â The activity and concentration of carbon dioxide (CO2) in the top layer of soil is determined by the process of root respiration and organic decomposition. While the existence of the material as a respiration medium and decomposition is determined by the slope variation of topographic position. This study aimed to find out the relationship of soil properties with the respiration of soil carbon dioxide (CO2) based on karst hill toposequence. The study was conducted in karst hill, the upper of Gilap cave Kenteng village Ponjong district Gunungkidul Regency. The location of the sample point was taken on a slope profile from the top of the hill, the central slope, and the foot of the slope. The results showed the correlation between respirations with the soil properties only on the upper slope. A strong positive correlation relationship was found among the content, organic matter, organic carbon, and specific density with the CO2 respiration yield on the upper slope. On the contrary, there was a strong negative correlation between moisture with CO2 respiration on the upper slope. The positive correlation among organic matter, organic carbon, and specific density variables with the rate of CO2 respiration on the upper slopes due to sampling in Shafts. And the negative correlation of moisture was caused by low carbon dioxide content in rainwater as richarge.
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