Labile and Dan Stable Carbon in the Soil of Monoculture and Polyculture Fields in Karangsambung, Kebumen, Indonesia
Penulis/Author
Prof. Dr. Ir. Sri Nuryani Hidayah Utami, M.P., M.Sc. (1); NURVITA TRIAS P (2); Dr. Ir. Eko Hanudin, M.P., IPU, ASEAN Eng (3)
Tanggal/Date
3 2019
Kata Kunci/Keyword
Abstrak/Abstract
There is increasing interest in soil organic carbon (SOC) in agricultural soils, as it contributes to soil fertility and also to the
mitigation of climate change when organic carbon sequestration is enhanced. The amount of carbon stored in each land is a
type of soil and how it is managed. The objective of this research was to determine and studying the status of labile and stable
carbon in monoculture and polyculture fields. This research was arranged in Completely Randomized Design (CRD) Factorial
consisting of 2 factors, i.e. two different cropping systems (monoculture and polyculture) and two different layers of the soil (0-
15 cm and 15-30 cm). This research showed that there was no significant difference in C-mineralization between monoculture
soil at the first and second layer (16.31-16.73 mg) and polyculture soil (15.64 – 15.96 mg). There was also no significant
difference observed on POMC content showing value of 1.52 % (monoculture) and 1.40 % (polyculture). Meanwhile, the
content of SMBC in monoculture soil (916.43 mg/kg) was higher than in polyculture soil (475.17 mg/kg). The content of watersoluble C in monoculture soil (836.78 mg/kg) was not significantly different from that in polyculture soil (815.66 mg/kg). Humic
acid content in polyculture soil (1.84 g/kg) was higher than in monoculture (1.49 g/kg), and conversely, fulvic acid content in
monoculture soil (2.83 g/kg) was higher than in polyculture soil (2.33 g/kg). There was no significant difference in humin
content between monoculture soil (0.971 g) and polyculture soil (0.970 g). Based on the result, polyculture fields system had
higher stable carbon content, while monoculture fields had higher labile carbon content.
