Carbon Organic Content under Organic and Conventional Paddy Field and its Effect on Biological Activities (A Case Study in Pati Regency, Indonesia)

Abstract

The low organic matter content of paddy soils impacts the declining quality of land. Without the efforts to enrich the soil organic matter (SOM) content, the productivity of paddy fields will decrease or the need for inorganic fertilizers will increase to reach the level of yield. The present research aims to determine the effect of differences in organic and conventional paddy fields management practices on soil organic carbon (SOC) content and biological activities. The research was conducted from July to September 2018 on organic and conventional paddy fields in Dukuhseti Sub-district, Pati Regency, Central Java, Indonesia. Sampling points were taken from six organic samples in the organic paddy fields while the other six samples were taken from conventional paddy fields. The variables observed in this research were organic C, pH, total N soil, total bacterial colonies, soil respiration and microbial biomass C. The results show that the organic C content in the organic paddy field (2.4%) was higher than that of the conventional paddy field (1.8%). The C content of organic paddy fields increased by 0.6%. The differences of the total bacterial colonies, soil respiration and microbial biomass C between organic paddy fields and conventional paddy fields were 11.5 CFU g<sup>-1</sup>, 7.42 mg CO<sub>2</sub> week<sup>-1</sup> and 0.51 µg g<sup>-1</sup>, respectively, because the use of organic farming systems could improve the biological nature of soils and caused biological activity in organic paddy fields to have the highest value compared to conventional paddy fields.

Land Suitability Assessment for Cassava var. Jarak Towo, Using Determinant Factors as the Strategy Fundament in Hilly Area Jatiyoso-Indonesia

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Increase of Cropping Index in Dryland Supported by Groundwater Irrigation

“…The carbon absorption in grain and straw of 4.614 ton ha -1 reduces the amount of carbon dioxide from the air, lowering the concentration of greenhouse gases in the air. The straw returning to the field improves soil fertility and health (Supriyadi et al, 2020;, as well as the sustainability of the agricultural system (Viandari et al, 2022). Rice farming in the first growing season and the rainy season has been carried out by farmers across generation and is feasible to develop.…”

Pengaruh dosis pupuk organik dan zat pengatur tumbuh dari ekstrak jagung terhadap koefisien sidik lintas karakter komponen hasil bawang merah varietas Bima

“…Pupuk organik selain mengandung bahan organik (Kaho et al, 2020), juga mengandung sejumlah unsur hara makro dan mikro termasuk N (Supriyadi et al, 2020;Subardja et al, 2020), yang berfungsi merangsang pertumbuhan vegetatif tanaman (Fuady et al, 2019), termasuk pertambahan tinggi dan jumlah anakan (Hardianti, 2015;Jamilah et al, 2019;Setiadi et al, 2018), dan pembentukan akar lateral dan serabut akar (Yuniarti et al, 2020), yang menyebabkan proses penyerapan air dan mineral dapat berjalan optimum (Cholilie et al, 2019).…”