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Publication
Endozoocoria aplicada às pastagens permanentes de sequeiro da Sociedade Agrícola dos Cordeiros, Lda.
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| 3.34 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Numa pastagem, o banco de sementes no solo pode ser melhorado pelo transporte
de sementes no trato digestivo dos animais (endozoocoria). Pretendeu-se avaliar a
produção de biomassa das pastagens da Herdade dos Cordeiros (Vila Viçosa), nas
parcelas de Cordeiros (semeada em 2018/19), Cabriz (melhorada pelo transporte de
semente pelos bovinos a partir da parcela Cordeiros) e Carvalhais (parcela nova na
exploração agrícola, cujo pastoreio pelos animais da exploração agrícola foi iniciado
em 2021/22 e que se pretende melhorar também por endozoocoria). Foi avaliada a
produção de biomassa das pastagens, utilizando 8 gaiolas de exclusão de pastoreio de
1m2
de área em cada parcela. Foram realizadas três colheitas, no dia 1 de dezembro
de 2021, 1 de março e 1 de junho de 2022. Foi determinado o peso verde e o peso
seco, após secagem a 105oC durante 24h e efetuada a separação em gramíneas,
leguminosas e outras famílias botânicas. A produção de biomassa total foi superior
nas parcelas melhoradas (Cordeiros e Cabriz), respetivamente 1946kg/ha e
2323kg/ha, enquanto Carvalhais produziu 1239kg/ha. A percentagem média de
leguminosas nos 3 cortes efetuados, foi superior na cerca de Cabriz (26%), seguida
de Cordeiros (18%) e de Carvalhais (10%). A cerca de Cordeiros foi a que apresentou
maior percentagem de outras famílias botânicas. A endozoocoria pode constituir um
método de melhoramento de pastagens, mas deve ser efetuado um planeamento do
percurso dos animais direcionado especificamente para esse objetivo. Propõe-se que,
após a maturação da semente das espécies que se pretendem propagar, os bovinos
pastoreiem durante um período de tempo curto (1 a 2 dias) na pastagem melhorada
e também um período curto na pastagem que se pretende melhorar para aí
dispersarem as sementes anteriormente ingeridas.
In a pasture, the seed bank in the soil can be improved through the transportation of seeds in the digestive tract of animals (endozoochory). The aim of this study was to evaluate the biomass production of the pastures at Herdade dos Cordeiros (Vila Viçosa) in three plots: Cordeiros (seeded in 2018/19), Cabriz (improved through seed transport by cattle from the Cordeiros plot), and Carvalhais (a new plot in the agricultural exploitation, which was grazed by animals from the agricultural exploitation starting in 2021/22 and also intended to be improved through endozoochory). The biomass production of the pastures was evaluated using 8 grazing exclusion cages with an area of 1m2 in each plot. Three harvests were conducted on December 1, 2021, March 1, and June 1, 2022. The fresh weight and dry weight were determined after drying at 105oC for 24 hours, and the separation into grasses, legumes, and other botanical families was performed. The total biomass production was higher in the improved plots (Cordeiros and Cabriz), with 1946 kg/ha and 2323 kg/ha, respectively, while Carvalhais produced 1239 kg/ha. The average percentage of legumes in the three harvests was higher in the Cabriz plot (26%), followed by Cordeiros (18%) and Carvalhais (10%). The Cordeiros plot had the highest percentage of other botanical families. Endozoochory can be a method for improving pastures, but a specific animal grazing plan should be implemented to achieve this objective. It is proposed that, after the seeds of the desired species have matured, the cattle graze on the improved pasture for a short period of time (1 to 2 days) and also on the pasture intended for improvement, thereby dispersing the previously ingested seeds there.
In a pasture, the seed bank in the soil can be improved through the transportation of seeds in the digestive tract of animals (endozoochory). The aim of this study was to evaluate the biomass production of the pastures at Herdade dos Cordeiros (Vila Viçosa) in three plots: Cordeiros (seeded in 2018/19), Cabriz (improved through seed transport by cattle from the Cordeiros plot), and Carvalhais (a new plot in the agricultural exploitation, which was grazed by animals from the agricultural exploitation starting in 2021/22 and also intended to be improved through endozoochory). The biomass production of the pastures was evaluated using 8 grazing exclusion cages with an area of 1m2 in each plot. Three harvests were conducted on December 1, 2021, March 1, and June 1, 2022. The fresh weight and dry weight were determined after drying at 105oC for 24 hours, and the separation into grasses, legumes, and other botanical families was performed. The total biomass production was higher in the improved plots (Cordeiros and Cabriz), with 1946 kg/ha and 2323 kg/ha, respectively, while Carvalhais produced 1239 kg/ha. The average percentage of legumes in the three harvests was higher in the Cabriz plot (26%), followed by Cordeiros (18%) and Carvalhais (10%). The Cordeiros plot had the highest percentage of other botanical families. Endozoochory can be a method for improving pastures, but a specific animal grazing plan should be implemented to achieve this objective. It is proposed that, after the seeds of the desired species have matured, the cattle graze on the improved pasture for a short period of time (1 to 2 days) and also on the pasture intended for improvement, thereby dispersing the previously ingested seeds there.
Description
Keywords
Alentejo Biomassa Bovinos Pastoreio Leguminosas Gramineas Cattle Biomass Grasses Grasing