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Machine learning models for crude protein prediction in Tamani grass pastures
Monteiro, Gabriela Oliveira de Aquino; Difante, Gelson dos Santos; Montagner, Denise Baptaglin; Euclides, Valéria Pacheco Batista; Castro, MarinaUnderstanding forage quality is essential for meeting animal demands and optimizing production. This study aimed to: (i) test the applicability of machine learning models with tabular data such as climate variables, light interception (LI), nitrogen dose (N dose), interval between grazing (GI), and pre- (HPRE) and post-grazing height (HPOST) to predict leaf crude protein (CP) content of tamani grass pastures; (...
Interpreting Machine Learning Models with SHAP Values: Application to Crude Pro...
Monteiro, Gabriela Oliveira de Aquino; Difante, Gelson dos Santos; Montagner, Denise Baptaglin; Euclides, Valéria Pacheco Batista; Castro, MarinaMachine learning models such as XGBoost show strong potential for predicting pasture quality metrics like crude protein (CP) content in tamani grass (Panicum maximum). However, their 'black box' nature hinders practical adoption. To address this limitation, this study applied SHapley Additive exPlanations (SHAP) to interpret an XGBoost model and uncover how management practices (grazing interval, nitrogen ferti...
Sward structure, morphological components and forage yield of massai grass in r...
Costa, José Eldo; Soares, Leonardo Eufrázio; Sousa, Valéria Fernandes de Oliveira; Costa, Ana Beatriz Graciano da; Emerenciano Neto, João VirgínioThe present study aimed to evaluate the residual effects of the application of biofertilizer and mineral fertilizer on sward structure and morphological components of Panicum maximum cv. Massai. The experimental design comprised randomized blocks with six treatments consisting of increasing doses of swine biofertilizer (0, 10, 20, 30 and 40 Mg ha-1) and mineral fertilization (150 kg N ha-1, 33 kg P ha-1), with ...
Ewe performance in the post-weaning phase and structural characteristics of Bra...
Silva, Alex Álvares da; Difante, Gelson dos Santos; Emerenciano Neto, João Virgínio; Gurgel, Antonio Leandro Chaves; Fernandes, Leonardo SantanaThe objective of this study was to examine the performance of ewes in the post-weaning phase and the structural characteristics of Brachiaria brizantha cultivars in the dry season. The treatments were represented by four Brachiaria brizantha cultivars (Piatã, Marandu, Paiaguás, and Xaraés), which were evaluated in a randomized-block design with two replicates for the forage variables and eight replicates for th...
Production and quality of tropical grasses at different regrowth intervals in t...
Pereira, Genildo Fonseca; Emerenciano Neto, João Virgínio; Difante, Gelson dos Santos; Assis, Liz Carolina da Silva Lagos CortesThe objective of this study was to evaluate the production and chemical composition of three forage species at different regrowth intervals. A 3 x 4 randomized-block factorial design with three forage species (Andropogon, Buffel, and Massai) and four regrowth intervals (21, 35, 49, and 63 days) was used. There was no interaction (p > 0.05) between forage species and regrowth interval on any of the chemical c...
Efficiency of the anti-GnRH vaccine for castration of lambs intended for finish...
Bonin, Mariana de Nadai; Ítavo, Camila Celeste Brandão Ferreira; Ítavo, Luís Carlos Vinhas; Gomes, Marina de Nadai BoninIt was aimed to evaluate anti-GnRH vaccine efficiency on productive characteristics, seminal performance, size, and histology of testicles of lambs submitted to immunocastration. Twenty contemporary Texel lambs were evaluated, being 10 animals received two doses of 1 mL of anti-GnRH vaccine and 10 received two doses of 1 mL of saline, with an interval of 30 days. Seminal characteristics, weight and histological...
Nutritive value and anatomical characterization from Pennisetum purpureum genot...
Lista, Fábio Nunes; Emerenciano Neto, João Virgínio; Almeida, João Carlos de Carvalho; Deminicis, Bruno Borges; Rocha, David Ramos daThe research submitted samples from stems and leaf blades from tree genotypes of Pennisetum purpureum called 93-32-02, 92-70-02, and 91-06-02 (EMBRAPA - Dairy cattle) and elephant grass cv. Napier (reference cultivar) to the chemical, anatomical evaluations, and in vitro dry matter digestibility (IVDMD) measurement. The anatomical characteristics of the stems and leaf blades, the chemical composition, and the I...
Morphogenic and structural characteristics of Panicum cultivars during the esta...
Costa, Ana Beatriz Graciano da; Difante, Gelson dos Santos; Gurgel, Antonio Leandro Chaves; Veras, Emmanuel Lievio de Lima; Rodrigues, Jéssica GomesThis study aimed to evaluate the morphogenic and structural characteristics of six Panicum maximum cultivars during the establishment period. A completely randomized block design with four replicates and six treatments (Tamani, Mombaça, Massai, Tanzania, Aruana and Zuri cultivars) was used. Morphogenic (leaf appearance rate, leaf elongation rate e stem elongation rate), structural (final leaf length, tiller pop...
Establishment of Brachiaria cultivars in the soil-climatic conditions of the Br...
Rodrigues, Jéssica Gomes; Difante, Gelson dos Santos; Gurgel, Antonio Leandro Chaves; Veras, Emmanuel Lievio de Lima; Costa, Ana Beatriz Graciano daThis study aimed was the establishment of the genus Brachiaria in the Brazilian semi-arid region. The experiment was conducted from April to June 2016, as a randomized-block experimental design with five treatments and four replicates. Treatments were represented by five Brachiaria cultivars, namely, Marandu, Paiaguás, Piatã, Xaraés and Basilisk. Morphogenetic (leaf appearance rate, leaf elongation rate e stem ...
Structural and productive features of Panicum cultivars submitted to different ...
Oliveira, Jacqueline dos Santos; Emerenciano Neto, João Virgínio; Difante, Gelson dos Santos; Lista, Fabio Nunes; Santos, Rodrigo da SilvaThe objective of this study was to evaluate the structural and productive features of Panicum maximum cultivars (Tanzânia, Mombaça, Massai, and Zuri) in three rest periods (30, 45 and 60 days), in the semiarid region of Brazil. The experiment was carried out in a completely randomized design with three replicates. The length of the leaf blade and the diameter of the stem increased as a function of the cut inter...