1 RINGKASAN
Serasah yang jatuh ke permukaan tanah akan segera mengalami dekomposisi sehingga dapat segera diserap kembali oleh tumbuhan. Penelitian ini menggunakan serasah jerami padi karena mengandung C:N yang tinggi sedangkan serasah daun kacang tanah digunakan karena mengandung C:N yang rendah. Perbandingan C:N tinggi menunjukkan bahan penyusun membusuk lebih lama bila dibandingkan dengan C:N yang rendah.
Pengelolaan tanah menggunakan serasah daun kacang tanah dan jerami padi dengan kandungan C:N berbeda diharapkan dapat meningkatkan aktivitas Collembola di dalam tanah.Aktivitas Collembola membantu jasad renik dalam merombak bahan-bahan organik sehingga proses dekomposisi menjadi lebih cepat dengan cara menghancurkan sisa-sisa
tumbuhan sehingga berukuran lebih kecil. Tujuan dari penelitian ini adalah untuk mengetahui dinamika Collembola pada serasah dengan C:N <10 dan >60 yang terdekomposisi di lahan pertanian, laju dekomposisi serasah dengan C:N <10 dan >60 yang
terdekomposisi di lahan pertanian dan korelasi antara laju dekomposisi, C:N, kelimpahan
2
serasah berbeda. Kandungan C:N serasah menjadi faktor yang menentukan komposisi dan komunitas Collembola pada serasah dan bersama dengan faktor lingkungan tanah dan laju kehilangan berat menunjukkan korelasi yang kuat terhadap komunitas Collembola.
3 SUMMARY
Litter that falls to the ground will soon decompose so it can be reabsorbed by the plants. This study uses rice straw litter for allegedly containing the C: N which is high while groundnut leaf litter used for allegedly containing the C: N is low. Comparison of C: N showed high decompose materials were not perfect and will decay longer than the C: N is low. Management of land use peanut leaf litter and rice straw containing the C: N differ expected to increase activity in the soil Collembola. Collembola activity helped remodel microorganisms in organic matter so that the process becomes more rapid decomposition by destroying the remains of plants that are smaller. The purpose of this study was to determine the dynamics of Collembola in the litter with the C: N <10 and> 60 are decomposed in agricultural land, the rate of decomposition of litter with C: N <10 and> 60 are decomposed in agricultural land and the correlation between the rate of decomposition, C : N, Collembola abundance, diversity and environmental factors familia Collembola. The research method used was a survey and experimental methods. Variables observed were independent variables and the dependent variable. The independent variables include the C: N litter rice straw and C: N leaf litter peanuts. Variable depending on the form of the dynamics of Collembola, whereas the observed parameters are familia Collembola diversity and number of individuals in each familia Collembola, as well as the rate of litter decomposition of rice straw and groundnut leaf litter. Other parameters measured were physical and chemical factors such as soil temperature, soil moisture, soil pH, C: N which decomposes, C and N content of leaf litter peanuts and rice straw ash and litter weight. Measurement of the rate of decomposition is done by using the exponential model of heavy residual litter. Collembola abundance was analyzed by t test. The correlation between the composition of Collembola on each type of litter, litter decomposition rates, and environmental factors were analyzed by Canonical Correspondence Analysis (CCA). Collembola communities fluctuated varied in leaf litter and litter peanut rice straw with family distinct dominance until week 12. Isotomidae familia, familia Hypogasturidae and Entomobryidae a community that gives character Collembola on litter rice straw while Paronellidae, Cyphoderidae, and Sminthuridae on peanut leaf litter. The pattern of fluctuations in the number of Collembola each familia through soil extraction and pitfall traps varied. The rate of weight loss of litter showed a similar rate, although the C: N ratio of each litter different beginning. The content of C: N litter into the factors that determine the composition and Collembola community in litter and soil together with environmental factors, and the rate of weight loss showed a strong correlation to the Collembola community.
