Alturas de manejo afetam pastagens de azevém no pampa do Rio Grande do Sul
The objective of this study was to determine the litter deposited, forage availability, its structural components, and nutritional value in ryegrass pastures managed at different heights. A randomized block design was adopted with four grazing heights (5, 10, 15, and 20 cm) and a no-grazing conditio...
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| Autores principales: | , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | portugués |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://dialnet.unirioja.es/servlet/oaiart?codigo=10265540 |
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| Sumario: | The objective of this study was to determine the litter deposited, forage availability, its structural components, and nutritional value in ryegrass pastures managed at different heights. A randomized block design was adopted with four grazing heights (5, 10, 15, and 20 cm) and a no-grazing condition (30 cm), with four repetitions, totaling 20 experimental units. Sixty days after the establishment of Lolium multiflorumcv. Estanzuela 284, grazing began using four tester sheep, grazing for 45 days. Subsequently, sampling was conducted to determine the variables. Dry matter production increased linearly in response to grazing heights, with an increase of 399.76 kg ha-1for each centimeter of increased pasture management height. Similarly, litter deposition also showed a linear increase of 62.96 kg ha-1for each centimeter of increase in pasture management heights. Regarding the nutritional value of the forage offered, the increase in heights provided a rise in nutritional value up to an approximate height of 22cm. At this estimated management height, forage was obtained with a higher crude protein content, dry matter intake, total digestible nutrients, dry matter digestibility, and forage utilization rate, along with lower values of neutral detergent fiber (NDF) and acid detergent fiber (ADF). All studied management heights can be adopted to obtain quality forage; however, increasing grazing heights up to 20 cm provides greater forage production, higher litter deposition, and forage with significant nutritional value. |
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