Sorghum root-system classification in contrasting P environments reveals three main rooting types and root-architecture-related marker-trait associations

The McKnight Foundation Collaborative Crop Research Program Project "New Approach for Improving Phosphorus Acquisition and Aluminum Tolerance of Plants in Marginal Soils"

Universidade estadual paulista "júlio de mesquita filho" faculdade de ciências agrárias e veterinárias câmpus de jaboticabal fenotipagem para a eficiência de fósforo em

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Morfologia do sistema radicular de genótipos de sorgo em função da concentração de fósforo na solução nutritiva.

New Approach for Improving Phosphorus Acquisition and Aluminum Tolerance of Plants in Marginal Soils

/pdf/avaliacao-de-produtividade-de-hibridos-isogenicos-de-sorgo-3wwfmy8pal.pdf

Avaliação de produtividade de híbridos isogênicos de sorgo em níveis de saturação de alumínio.

/pdf/caracterizacao-da-morfologia-radicular-de-linhagens-de-sorgo-20mzto8kgf.pdf

Caracterização da morfologia radicular de linhagens de sorgo contrastantes para eficiência do uso de fósforo.

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Avaliação da produtividade de linhagens recombinantes contrastantes para gene de tolerância ao Al tóxico em sorgo - AltSB.

The objective of this study was to evaluate the forage-intake process of goats feeding on Massai grass pastures with different heights (40, 50, 60, and 70 cm). The experimental design was completely randomized, with treatments corresponding to four sward heights with two replicates over time and space. Collected data were related to the forage-intake process and the chemical and morphological composition of the pasture. Grazing trials (45 min) were performed with four Anglo-Nubian crossbred goats. Total forage mass intake, bite mass, and intake rate were expressed in relation to animal weight. Pasture density, forage mass, and leaf blade increased as forage height increased. The chemical composition of forage at the evaluated heights was similar, except for reduced crude protein content at 70-cm height. Bite rate, intake rate, and time per bite had a quadratic relationship with increasing sward height. The greatest intake rate was observed at 54.7 cm of height, with 0.136 g DM min-1 kg-1 LW. Bite rate exhibited a linear and positive correlation with increase in intake. At the 50-cm height, goats harvested a mass of 3.65 g DM bite-1 kg-1 LW, when they performed 34.5 bites per minute. Adult goats had a greater forage intake on 50-cm high Massai grass pastures because they could obtain a greater bite mass in a shorter time per bite.

Forage intake process of goats on a Massai grass pasture with different sward heights.

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F. Rodrigues

Papers

Avaliação de produtividade de híbridos isogênicos de sorgo em níveis de saturação de alumínio.

Caracterização da morfologia radicular de linhagens de sorgo contrastantes para eficiência do uso de fósforo.

Avaliação da produtividade de linhagens recombinantes contrastantes para gene de tolerância ao Al tóxico em sorgo - AltSB.

Forage intake process of goats on a Massai grass pasture with different sward heights.

Avaliação de linhagens de sorgo cultivadas em estresse de fósforo para a liberação de compostos radiculares.