Canopy structure and morphogenesis of Italian ryegrass intercropped with red clover under cutting intervals determined by thermal sum
ABSTRACT: The canopy structure and morphogenesis of ryegrass (Lolium multiflorum Lam.) was investigated after it was over seeded with Tifton 85 (Cynodon spp.) and intercropped with red clover (Trifolium pratense L.). Time intervals between cuts were determined by different thermal sums (125, 250, 37...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2020-09-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020001100656&tlng=en |
| _version_ | 1819284830366466048 |
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| author | Fernando Ongaratto Marta Gomes da Rocha Luciana Pötter Tuani Lopes Bergoli Paula de Oliveira Severo Juliana Squizani Dutra Juliana Missio Machado Lisiani Rorato Dotto Amanda Carneiro Martini Eduarda Proença de Oliveira |
| author_facet | Fernando Ongaratto Marta Gomes da Rocha Luciana Pötter Tuani Lopes Bergoli Paula de Oliveira Severo Juliana Squizani Dutra Juliana Missio Machado Lisiani Rorato Dotto Amanda Carneiro Martini Eduarda Proença de Oliveira |
| author_sort | Fernando Ongaratto |
| collection | DOAJ |
| description | ABSTRACT: The canopy structure and morphogenesis of ryegrass (Lolium multiflorum Lam.) was investigated after it was over seeded with Tifton 85 (Cynodon spp.) and intercropped with red clover (Trifolium pratense L.). Time intervals between cuts were determined by different thermal sums (125, 250, 375, and 500 degree-days [DD]). Cuts were conducted at a height equivalent to 50% of the average canopy height. Morphogenic and structural data were collected from July to October of 2016 and 2017, from a completely randomized block experimental design. Canopy height, extended tiller height, pseudostem length, and forage mass were fitted to linear equations according to the thermal sums. Interaction of ryegrass with red clover was the highest (12.1%) for longer cut intervals (375 and 500 DD). The leaf appearance rate (0.0080 leaf/DD), phyllochron value (128.8 DD), and senescence rate (0.10 cm/DD) of ryegrass were comparable between the different intervals. The slowest elongation rate (0.06 cm/DD) with the shortest interval duration between cuts (171.6 DD) was observed in the 125 DD interval. According to the findings from this 2-year experiment, the use of a 250 DD cut interval was recommended between grazing events, taking into account the efficiency of forage use, ryegrass leaf, stem ratio, and interactions with red clover in the canopy under rotational stocking. |
| first_indexed | 2024-12-24T01:53:36Z |
| format | Article |
| id | doaj.art-80326018a7994853a42db3f01a84c822 |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-24T01:53:36Z |
| publishDate | 2020-09-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-80326018a7994853a42db3f01a84c8222022-12-21T17:21:39ZengUniversidade Federal de Santa MariaCiência Rural1678-45962020-09-01501110.1590/0103-8478cr20190989Canopy structure and morphogenesis of Italian ryegrass intercropped with red clover under cutting intervals determined by thermal sumFernando Ongarattohttps://orcid.org/0000-0002-6959-3700Marta Gomes da Rochahttps://orcid.org/0000-0001-7207-7494Luciana Pötterhttps://orcid.org/0000-0002-6288-4468Tuani Lopes Bergolihttps://orcid.org/0000-0001-5857-0098Paula de Oliveira Severohttps://orcid.org/0000-0003-3471-133XJuliana Squizani Dutrahttps://orcid.org/0000-0002-7147-994XJuliana Missio Machadohttps://orcid.org/0000-0001-8012-2304Lisiani Rorato Dottohttps://orcid.org/0000-0002-8900-9014Amanda Carneiro Martinihttps://orcid.org/0000-0003-1438-5848Eduarda Proença de Oliveirahttps://orcid.org/0000-0001-8647-1599ABSTRACT: The canopy structure and morphogenesis of ryegrass (Lolium multiflorum Lam.) was investigated after it was over seeded with Tifton 85 (Cynodon spp.) and intercropped with red clover (Trifolium pratense L.). Time intervals between cuts were determined by different thermal sums (125, 250, 375, and 500 degree-days [DD]). Cuts were conducted at a height equivalent to 50% of the average canopy height. Morphogenic and structural data were collected from July to October of 2016 and 2017, from a completely randomized block experimental design. Canopy height, extended tiller height, pseudostem length, and forage mass were fitted to linear equations according to the thermal sums. Interaction of ryegrass with red clover was the highest (12.1%) for longer cut intervals (375 and 500 DD). The leaf appearance rate (0.0080 leaf/DD), phyllochron value (128.8 DD), and senescence rate (0.10 cm/DD) of ryegrass were comparable between the different intervals. The slowest elongation rate (0.06 cm/DD) with the shortest interval duration between cuts (171.6 DD) was observed in the 125 DD interval. According to the findings from this 2-year experiment, the use of a 250 DD cut interval was recommended between grazing events, taking into account the efficiency of forage use, ryegrass leaf, stem ratio, and interactions with red clover in the canopy under rotational stocking.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020001100656&tlng=enLolium multiflorum Lam.OverseedingRotational StockingTifton 85Trifolium pratense L. |
| spellingShingle | Fernando Ongaratto Marta Gomes da Rocha Luciana Pötter Tuani Lopes Bergoli Paula de Oliveira Severo Juliana Squizani Dutra Juliana Missio Machado Lisiani Rorato Dotto Amanda Carneiro Martini Eduarda Proença de Oliveira Canopy structure and morphogenesis of Italian ryegrass intercropped with red clover under cutting intervals determined by thermal sum Ciência Rural Lolium multiflorum Lam. Overseeding Rotational Stocking Tifton 85 Trifolium pratense L. |
| title | Canopy structure and morphogenesis of Italian ryegrass intercropped with red clover under cutting intervals determined by thermal sum |
| title_full | Canopy structure and morphogenesis of Italian ryegrass intercropped with red clover under cutting intervals determined by thermal sum |
| title_fullStr | Canopy structure and morphogenesis of Italian ryegrass intercropped with red clover under cutting intervals determined by thermal sum |
| title_full_unstemmed | Canopy structure and morphogenesis of Italian ryegrass intercropped with red clover under cutting intervals determined by thermal sum |
| title_short | Canopy structure and morphogenesis of Italian ryegrass intercropped with red clover under cutting intervals determined by thermal sum |
| title_sort | canopy structure and morphogenesis of italian ryegrass intercropped with red clover under cutting intervals determined by thermal sum |
| topic | Lolium multiflorum Lam. Overseeding Rotational Stocking Tifton 85 Trifolium pratense L. |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020001100656&tlng=en |
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