INTERNATIONAL JOURNAL OF AGRICULTURAL TECHNOLOGY

Volume 15, No. 06, Month NOVEMBER, Year 2019, Pages 975 - 986

Co2 emission and accumulation of soil organic matter under sweet corn stand in the long term organically managed land

Muktamar, Z., Fahrurrozi, F., Prawito, P., Sembiring, A. P., Setyowati, N., Sudjatmiko, S. and Chozin, M.

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It has been widely recognized that agriculture practice emits a significant amount of carbon dioxide. Long-term practice of organic agriculture accumulates organic matter in the soil; however, at the same time releases carbon dioxide. The study indicated that carbon flux from the organically managed sweet corn stand fluctuated during the growing period. However, the increasing rate of vermicompost did not influence carbon flux unless soil disturbance had occurred (tillage and heaping). When soil disturbed, high rate of vermicompost emitted carbon dioxide higher than the lower one. In addition, soil organic matter at 0-10 cm depth for 3-year accumulation increased at a higher rate of vermicompost but not at a depth of 10-20 cm. Soil organic matter accumulation brought about a reduction of exchangeable Al; accordingly, rising in soil pH. Carbon released from organically managed land in tropical highland was highly dependent on soil disturbance and crop growth stage.

Keywords

carbon emission; carbon accumulation; sweet corn; organic farming

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