Seed longevity of Eragrostis plana Nees buried in natural grassland soil
The objective of this research was to evaluate the seed longevity of Eragrostis plana Nees buried at different soil depths, in a natural-grassland area in the Pampa biome (46 m altitude, 30º05´S and 51º40´W) of Rio Grande do Sul State, Brazil. The experimental design was a split-plot type in complet...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Zootecnia
2014-11-01
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| Series: | Revista Brasileira de Zootecnia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001100561&lng=en&tlng=en |
| _version_ | 1811237481183444992 |
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| author | Renato Borges de Medeiros Telmo Focht Leandro Luiz Menegon Mário Ruschel Freitas |
| author_facet | Renato Borges de Medeiros Telmo Focht Leandro Luiz Menegon Mário Ruschel Freitas |
| author_sort | Renato Borges de Medeiros |
| collection | DOAJ |
| description | The objective of this research was to evaluate the seed longevity of Eragrostis plana Nees buried at different soil depths, in a natural-grassland area in the Pampa biome (46 m altitude, 30º05´S and 51º40´W) of Rio Grande do Sul State, Brazil. The experimental design was a split-plot type in complete blocks with two factors: seeds buried at five different depth levels (soil surface and 2.5, 5, 10 and 20 cm) and seven exhumation dates. The blocks were allocated in natural grassland grazed by cattle, allocated in a 12-m-long transection. Fifty-four permeable nylon bags filled with 100 seeds in each division, with five vertical divisions, were buried in each row. Seven exhumation dates were used: the first on October 14, 2003 and the last on January 14, 2006. The percentage of viable seeds of E. plana, collected at seven exhumation times and set at different depths in the soil horizon, were described by simple negative exponential equations. Based on the model, the percentage of viable seeds collected at the five depths, (soil surface and 2.5, 5, 10, and 20 cm), after 2.5 years of burial, were 0.1, 0.5, 1.0, 7.4 and 22.1%, respectively. Increase in depth is directly associated with physical and physiological seed integrity of E. plana. Negative simple exponential equations can be used to predict seed longevity of E. plana buried in nylon bags. This invader species accumulates soil seed-bank of high longevity. |
| first_indexed | 2024-04-12T12:24:11Z |
| format | Article |
| id | doaj.art-55a435cab65b4cf6afd1011a9ad94ae9 |
| institution | Directory Open Access Journal |
| issn | 1806-9290 |
| language | English |
| last_indexed | 2024-04-12T12:24:11Z |
| publishDate | 2014-11-01 |
| publisher | Sociedade Brasileira de Zootecnia |
| record_format | Article |
| series | Revista Brasileira de Zootecnia |
| spelling | doaj.art-55a435cab65b4cf6afd1011a9ad94ae92022-12-22T03:33:12ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1806-92902014-11-01431156156710.1590/S1516-35982014001100001S1516-35982014001100561Seed longevity of Eragrostis plana Nees buried in natural grassland soilRenato Borges de MedeirosTelmo FochtLeandro Luiz MenegonMário Ruschel FreitasThe objective of this research was to evaluate the seed longevity of Eragrostis plana Nees buried at different soil depths, in a natural-grassland area in the Pampa biome (46 m altitude, 30º05´S and 51º40´W) of Rio Grande do Sul State, Brazil. The experimental design was a split-plot type in complete blocks with two factors: seeds buried at five different depth levels (soil surface and 2.5, 5, 10 and 20 cm) and seven exhumation dates. The blocks were allocated in natural grassland grazed by cattle, allocated in a 12-m-long transection. Fifty-four permeable nylon bags filled with 100 seeds in each division, with five vertical divisions, were buried in each row. Seven exhumation dates were used: the first on October 14, 2003 and the last on January 14, 2006. The percentage of viable seeds of E. plana, collected at seven exhumation times and set at different depths in the soil horizon, were described by simple negative exponential equations. Based on the model, the percentage of viable seeds collected at the five depths, (soil surface and 2.5, 5, 10, and 20 cm), after 2.5 years of burial, were 0.1, 0.5, 1.0, 7.4 and 22.1%, respectively. Increase in depth is directly associated with physical and physiological seed integrity of E. plana. Negative simple exponential equations can be used to predict seed longevity of E. plana buried in nylon bags. This invader species accumulates soil seed-bank of high longevity.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001100561&lng=en&tlng=enbiological invasioninvader speciesPampa biomerecovered seedsseed banksurviving seeds |
| spellingShingle | Renato Borges de Medeiros Telmo Focht Leandro Luiz Menegon Mário Ruschel Freitas Seed longevity of Eragrostis plana Nees buried in natural grassland soil Revista Brasileira de Zootecnia biological invasion invader species Pampa biome recovered seeds seed bank surviving seeds |
| title | Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
| title_full | Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
| title_fullStr | Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
| title_full_unstemmed | Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
| title_short | Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
| title_sort | seed longevity of eragrostis plana nees buried in natural grassland soil |
| topic | biological invasion invader species Pampa biome recovered seeds seed bank surviving seeds |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001100561&lng=en&tlng=en |
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