VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES
ABSTRACT One of the limitations to producing irrigated forages is setting suitable biometric parameters to establish the entrance of animals to grazing areas. Such parameters can be measured or even estimated. Estimates are advantageous for being practical and able to be used for grazing optimizatio...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Engenharia Agrícola
2019-04-01
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| Series: | Engenharia Agrícola |
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| Online Access: | http://www.scielo.br/pdf/eagri/v39n2/1809-4430-eagri-39-02-0191.pdf |
| _version_ | 1819007907601055744 |
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| author | Arthur C. Sanches Débora P. de Souza Fernanda L. F. de Jesus Fernando C. Mendonça Eder P. Gomes |
| author_facet | Arthur C. Sanches Débora P. de Souza Fernanda L. F. de Jesus Fernando C. Mendonça Eder P. Gomes |
| author_sort | Arthur C. Sanches |
| collection | DOAJ |
| description | ABSTRACT One of the limitations to producing irrigated forages is setting suitable biometric parameters to establish the entrance of animals to grazing areas. Such parameters can be measured or even estimated. Estimates are advantageous for being practical and able to be used for grazing optimization. This study aimed to evaluate the correlation among growing degree-days (GDD), canopy height (CH), leaf area index (LAI), and number of cycle days (NCD) of Guinea grass (Panicum maximum cv. Mombaça) and Bermuda grass (Cynodon spp. Tifton 85) single cropped for one year and overseeded with black oat and ryegrass in the autumn-winter season. The study was carried out from February 2016 to February 2017, and forage crops were sprinkle irrigated. LAI and CH were measured twice a week, at intervals of 3 and 4 days. These parameters were correlated to GDD accumulation at each cutting cycle (CC). All the correlations showed high coefficients in linear fits. For spring-summer cycles, Guinea grass in exclusive cultivation showed the highest averages for CH and LAI, being 102.3 cm and 5.93, respectively. For autumn- winter cycles, when this grass was overseeded, it showed an LAI value similar to that when single cropped, which was of about 5.6. Yet single Bermuda grass presented lower values of LAI (one unit lower) and CH (16.4 cm lower) in the autumn-winter season when compared to that overseeded. The spring-summer cycles of Guinea grass had a duration of 24 days, after which no increase in leaf production was registered. |
| first_indexed | 2024-12-21T00:32:02Z |
| format | Article |
| id | doaj.art-3eeef71c8acc4b69a41edf04a768fc1e |
| institution | Directory Open Access Journal |
| issn | 0100-6916 |
| language | English |
| last_indexed | 2024-12-21T00:32:02Z |
| publishDate | 2019-04-01 |
| publisher | Sociedade Brasileira de Engenharia Agrícola |
| record_format | Article |
| series | Engenharia Agrícola |
| spelling | doaj.art-3eeef71c8acc4b69a41edf04a768fc1e2022-12-21T19:21:52ZengSociedade Brasileira de Engenharia AgrícolaEngenharia Agrícola0100-69162019-04-0139219119710.1590/1809-4430-eng.agric.v39n2p191-197/2019VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGESArthur C. Sancheshttps://orcid.org/0000-0003-2379-0634Débora P. de SouzaFernanda L. F. de JesusFernando C. MendonçaEder P. GomesABSTRACT One of the limitations to producing irrigated forages is setting suitable biometric parameters to establish the entrance of animals to grazing areas. Such parameters can be measured or even estimated. Estimates are advantageous for being practical and able to be used for grazing optimization. This study aimed to evaluate the correlation among growing degree-days (GDD), canopy height (CH), leaf area index (LAI), and number of cycle days (NCD) of Guinea grass (Panicum maximum cv. Mombaça) and Bermuda grass (Cynodon spp. Tifton 85) single cropped for one year and overseeded with black oat and ryegrass in the autumn-winter season. The study was carried out from February 2016 to February 2017, and forage crops were sprinkle irrigated. LAI and CH were measured twice a week, at intervals of 3 and 4 days. These parameters were correlated to GDD accumulation at each cutting cycle (CC). All the correlations showed high coefficients in linear fits. For spring-summer cycles, Guinea grass in exclusive cultivation showed the highest averages for CH and LAI, being 102.3 cm and 5.93, respectively. For autumn- winter cycles, when this grass was overseeded, it showed an LAI value similar to that when single cropped, which was of about 5.6. Yet single Bermuda grass presented lower values of LAI (one unit lower) and CH (16.4 cm lower) in the autumn-winter season when compared to that overseeded. The spring-summer cycles of Guinea grass had a duration of 24 days, after which no increase in leaf production was registered.http://www.scielo.br/pdf/eagri/v39n2/1809-4430-eagri-39-02-0191.pdfirrigationLolium multiflorumAvena strigosabase temperaturegrass |
| spellingShingle | Arthur C. Sanches Débora P. de Souza Fernanda L. F. de Jesus Fernando C. Mendonça Eder P. Gomes VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES Engenharia Agrícola irrigation Lolium multiflorum Avena strigosa base temperature grass |
| title | VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES |
| title_full | VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES |
| title_fullStr | VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES |
| title_full_unstemmed | VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES |
| title_short | VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES |
| title_sort | vegetative development and growing degree days of tropical and winter forages |
| topic | irrigation Lolium multiflorum Avena strigosa base temperature grass |
| url | http://www.scielo.br/pdf/eagri/v39n2/1809-4430-eagri-39-02-0191.pdf |
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