Nutrient Profile and In Vitro Digestibility of Thirty Indonesian Soybean Genotypes Grown at Two Different Soil pH for Selection as Ruminant Feed
Nutrient Profile and In Vitro Digestibility of Thirty Indonesian Soybean Genotypes Grown at Two Different Soil pH for Selection as Ruminant Feed
Taufiq Bachtiar1, Muftia Hanani2, Anisiyah2, Winda Puspitasari2, Wahidin Teguh Sasongko3, Teguh Wahyono4*
ABSTRACT
This work investigates the effects of different soil pH and different genotypes on the nutrient profiles and in vitro digestibility of soybeans. Thirty soybean genotypes were evaluated for nutrient composition, fiber content, and in vitro digestibility after cultivation in pH 4.0 and 5.4 soils. The experiment was arranged factorially in a completely randomized block design. The experimental factors were soybean genotype and soil pH. Results showed significant (p < 0.001) differences in fiber content, non-fiber carbohydrate content, and in vitro dry matter digestibility (IVDMD) parameters among studied genotypes. There were significant differences (p < 0.05) between the two soil pH conditions for ash, organic matter, ether extract, neutral detergent fiber, acid detergent fiber, hemicellulose, and non-fiber carbohydrate. Organic matter, crude protein, ether extract, and non-fiber carbohydrate content in soil with pH 5.4 ranged between 91.94–94.67, 27.78–38.20, 13.99–22.78, and 16.31–33.82% DM, respectively. Meanwhile, in soil pH of 4.0, ranges were 92.24–94.80, 23.07–39.99, 14.88–22.82, and 12.69–38.20% DM, respectively. The Deja 2 genotype had the highest (p < 0.01) IVDMD value (84.07 %) in pH 5.4 soil. However, in pH 4.0 soil, the highest (p < 0.01) IVDMD was found in the Burangrang genotype (83.32%). Our results showed that IVDMD in soil with pH 4.0 was weakly correlated (p > 0.05) to NDF and ADF (R2 = -0.126 and R2 = -0.144, respectively). Despite the differences in soil pH affecting nutrient and fiber composition in soybeans, IVDMD value was not found to be significantly different. Due to its high and stable crude protein and IVDMD production, Gamasugen 2 was identified as having potential for development in the two different soil pH conditions.
Keywords | Acid soil, In vitro digestibility, Nutrient, Genotypes, Soybean
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August 2022
Vol. 10, Iss. 8, Pages 1659-1886
