Short-Term Effect of Rice Straw Management on Organic Carbon and Soil CN Ratio

Authors

  • Ida Ayu Kusuma Tri Handayani Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia
  • Ni Nyoman Sulastri Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia
  • I Gusti Ketut Arya Arthawan Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia
  • I Made Anom Sutrisna Wijaya Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

DOI:

https://doi.org/10.24843/j.beta.2025.v13.i01.p09

Keywords:

Soil Organic Carbon, C/N Ratio, Straw Management

Abstract

The annual rice planting cycle produced 6.73 tons of dry straw per hectare. Rice straw had beneficial
nutrients for plants, but farmers often burned or buried it to reduce waste and enhance soil fertility. Because
straw was hard to decompose, additional decomposers like bacteria were needed. This study aimed to
investigate the short-term impact of rice straw management on soil organic carbon (C-organic) and the C/N
ratio. The experimental design used was Nested Design. The study involved three straw management
treatments: burning (BR), straw incorporation without EM4 addition (S0), and straw incorporation with
EM4 addition (S1). Laboratory analysis was conducted on the C-organic and C/N ratio parameters.
Differences in soil parameters observed before and after straw management treatments were analyzed using
the Wilcoxon Signed Rank Test. The analysis showed an increase in C-organic after treatment: 29.7% for
burning, 10.9% for straw incorporation, and 10.2% for straw incorporation with EM4. The rise in C-organic
after straw management treatments is due to the mineralization of soil organic matter. This mineralization
is indicated by average C/N values below 20, although the C/N ratio after burning increased by 56% and
after straw incorporation with EM4 increased by 0.35%. The average C/N ratios from all treatments ranged
from 9.1 to 16.8. In the short term, all three straw treatments can increase organic carbon and C/N ratios
below 20.

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Published

2025-04-30

How to Cite

Handayani, I. A. K. T., Sulastri, N. N., Arthawan, I. G. K. A., & Wijaya, I. M. A. S. (2025). Short-Term Effect of Rice Straw Management on Organic Carbon and Soil CN Ratio. Jurnal BETA (Biosistem Dan Teknik Pertanian), 13(1), 81–87. https://doi.org/10.24843/j.beta.2025.v13.i01.p09

Issue

Vol. 13 No. 1 (2025): April

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