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- Title
Producción de forraje en híbridos de Urochloa bajo condiciones de sol y sombra de Melia azedarach L.
- Authors
JARILLO-RODRÍGUEZ, JESÚS; CASTILLO-GALLEGOS, EPIGMENIO; LÓPEZ-ORTIZ, SILVIA
- Abstract
Urochloa hybrids CIAT BR02/1752 and CIAT BR02/1794 were evaluated under full sun and shade in a Melia azedarach L. plantation (1,000 trees/ha). The study was carried in Tlapacoyan (Veracruz, Mexico), at 847 masl, in an (A)C(m)w'(f) climate, with a mean annual temperature >18 °C, and 1,991 mm of rain/year. The grasses were established in March 2019, using vegetative material planted at 0.5 × 0.5 m, in 2.5 × 5 m plots. The experimental design was a split-split-split plot in three complete randomized blocks, with full sun or shade conditions as main plots, the hybrids as sub-plots, the harvest date as sub-sub plots and age of regrowth as sub-sub-sub plots. Dry matter (DM) yields per tiller, plant and hectare were measured at 8 and 12 weeks of regrowth, harvesting a 1 m2 sample located in the middle of each sub-sub-subplot. Fresh material harvested was separated into leaves and stems, and dried at 55 °C for 72 h. The DM/tiller was affected by Age P<0.0001) and Group × Age (P<0.0003); with Group defined by the combination of Condition × Hybrids. DM yield/ha was affected by Condition, Age, Condition × Age, and other interactions (with Hybrids, Date and Age of Harvest). DM yield/tiller was more affected by Condition than by Hybrids. Total DM/ha yield was higher under full sun (1026.8±72.6 kg DM/ha) than shade (505.3±72.5 kg DM/ha), and the same happened for leaf and stem yields. Hybrid 1752 outyielded 1794 (1026.9 ±72.7 and 695.3±72.7 kg DM/ha, respectively). DM yield/ha also increased with age of regrowth.
- Subjects
HARVESTING time; AGE groups; RAINFALL; HARVESTING; SIGNALGRASS
- Publication
Tropical Grasslands / Forrajes Tropicales, 2023, Vol 11, Issue 3, p210
- ISSN
2346-3775
- Publication type
Article
- DOI
10.17138/TGFT(11)210-219