Dinamika Bahan Organik dan Total Nitrogen Tanah pada Pengelolaan Jerami Padi

I Gusti Ayu Evi Sukma Elvayani (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)
Yohanes Setiyo (Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia)

Jurnal BETA (Biosistem dan Teknik Pertanian)
Vol 13 No 1 (2025): April

Rice straw, a major agricultural residue, can be approximately 25 tons/ha post-harvest. Typically managedby farmers through burial or burning, this study aimed to analyze the dynamics of soil organic matter andtotal nitrogen during rice straw management and assess nitrogen mineralization outcomes post-treatment.Employing a Nested Design, the study evaluated three straw management treatments: burial with EM4 (SI),burial without EM4 (SI0), and burning (BR), with sampling locations nested within treatment factors.Laboratory analyses using Walkey and Black's method measured Soil Organic Matter (SOM), whileKjeldahl's method assessed Total Kjeldahl Nitrogen (TKN). Pre and post-treatment SOM content rangedfrom 3.94% to 5.11%, showing no significant impact from straw management (p>0.05). TKN levels variedbetween 0.17% and 0.39%, with burial treatments significantly differing (p<0.05), unlike burning (p>0.05).Nested Design testing revealed significant treatment effects, prompting LSD post-hoc tests. Overall, soilSOM increased after straw management, notably impacted by burning. Post-treatment averages for SOMand TKN were: burial with EM4 (5.11% and 0.34%), burial without EM4 (5.15% and 0.39%), and burning(5.11% and 0.33%).