Usage of soil amendment to increase fragrance of Khao Dawk Mali 105 and reducing methane emissions in rice fields
Keywords:
Methane, Biochar, Rice fields, 2-Acetyl-1-pyrroline (2AP)Abstract
This research aimed to study the influence of fertilizer management on rice in three different regimes: chemical fertilizer alone, chemical fertilizer combined with sulfur, and the use of soil amendments containing biochar components to mitigate methane emissions in rice fields and improve rice yield. The study was conducted in experimental plots located in Mueang Sri Kai Sub-district, Warinchamrab District, Ubon Ratchathani Province. The experimental design comprised four treatments: 1) C (Control), without soil amendments and any type of fertilizer, 2) F (Fertilizer), conventional method, using only chemical fertilizer, 3) FS (Fertilizer/Sulfur), using chemical fertilizer combined with sulfur, and 4) FBS (Fertilizer/Biochar/Sulfur), using soil amendments containing chemical fertilizer, biochar, and sulfur. Methane emissions were monitored throughout the growing season. Results showed that when comparing the F, FS, and FBS treatments with different fertilizer management practices, the FS and FBS treatments reduced methane emissions in rice fields compared to the F treatment by 19.06% and 5.68%, respectively. Additionally, the FS and FBS treatments resulted in the highest rice yields, with average grain yields of 91.13 and 91.00 grams per pot, respectively. Analysis of 2-Acetyl-1-pyrroline (2AP) content revealed significant differences (P<0.05) among the treatments, with the FBS treatment producing the highest 2AP content compared to the other treatments. This study demonstrates the effectiveness of soil amendments in reducing methane emissions in rice fields compared to using chemical fertilizer alone, while also increasing 2AP content in rice grains. These findings highlight the importance of soil amendments in enhancing agricultural value and addressing environmental challenges.
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