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- Title
Optimal plot size in forage sorghum with comparison of the methods of modified maximum curvature, linear response and plateau model and quadratic response and plateau model.
- Authors
Filho, Alberto Cargnelutti; Lixinski Silveira, Daniela; Trivisiol, Vinicius Severo; Escaio Bubans, Valéria; Somavilla, Felipe Manfio; Morena Ortiz, Vithória; Osmari, Bruno Fillipin; Osmari, Lucas Fillipin
- Abstract
The objective of this study was to compare three methods for estimating the optimal plot size to evaluate the fresh matter productivity of forage sorghum (Sorghum bicolor (L.) Moench) sown in rows, evaluated in three cuts. Two uniformity trials (repetitions) were carried out. In each trial, three plant cuts were performed, totaling six uniformity trials (2 trials per cut x 3 cuts). The first cut was performed at 41 days after sowing (DAS), the second at 82 DAS and the third at 133 DAS. Fresh matter productivity was evaluated in 216 basic experimental units (BEU) of 1 m x 1 m (36 BEU per trial). The BEU was formed by two rows of 1.0 m in length, spaced 0.50 m apart, totaling 1.0 m². The optimal plot size was determined using the methods of modified maximum curvature, linear response and plateau model and quadratic response and plateau model. The optimal plot size differs between the methods and decreases in the following order: quadratic response and plateau model (9.10 m²), linear response and plateau model (7.16 m²) and modified maximum curvature (4.13 m²). The optimal plot size to evaluate the fresh matter productivity of forage sorghum, sown in rows, evaluated in three cuts, is 7.16 m² and the experimental precision stabilizes from this size on.
- Subjects
SORGHUM; CURVATURE; PLANT cuttings; UNIFORMITY; SOWING
- Publication
Colloquium Agrariae, 2022, Vol 18, Issue 3, p24
- ISSN
1809-8215
- Publication type
Article
- DOI
10.5747/ca.2022.v18.n3.a495