The agronomical evaluation and the comparative work of six multiannual forage species was conducted in the facilities of the Benson Institute, in the community of Contorno de Letanias, Ingavi province, La Paz. The objectives were to evaluate the agronomic behavior, as well as to evaluate the dry matter (DM) yield of six multiannual forage species (grasses) under local conditions, and to determine the partial cost of production of the studied species. The annual mean temperature was 9.14°C, and 517.6 mm of precipitation. The test was conducted under the random block design test, with six different forage species, and three repetitions. The evaluated species were: Hybrid grass (Agropyrum crisantum x A. desertorum), Bromus grass(Bromus inermis), Phleum grass (Phleum pratense), Pubescent grass (Agropyron trichophorum), Orchard grass (Dactylis glomerata), and Weeping lovegrass (Eragrostis curvula). The evaluated response variables were: Plant density (%), plant height (cm), base area (m²), tip area (m²), leaf/stem relationship, dry matter yield (kg/ha), and plant vigor. The forage species (grass) that presented a better behavior in relationship to plant density were the weeping lovegrass, Phleum, Orchard, Bromus, and Pubescent grass with: 92.17, 84.44, 75.95, 70.77, and 68.6%. The hybrid grass presented the least density with a 55.50% respectively. According to plant height at two different cut times, the Orchard, Pubescent, Weeping lovegrass, Bromus, Phleum, and Hybrid grass species presented a mean height of 23.0, 26.24, 15.31, 12.27, and 15.5 cm respectively, a tip area of.037, 0.26,.032, 0.32, 0.28, and 0.25 m², and a base area of 0.14, 0.09, 0.10, 0.16, and 0.10 m². The dry matter yield (The total sum of two cuts) was of 3936.0 kg/ha for Pubescent grass, 3459.0 kg/ha of Bromus grass, 2780.7 kg/ha of Weeping lovegrass, 2358.0 kg/ha of Hybrid grass, and 2089.0 kg/ha of Pleum grass. The relationship leaf/stem relationship resented an average of 1.13, 3.38, 3.71, 2.84, 2.49, and 2.93 respectively. The species: Orchard and pubescent grass presented a variable cost of 1384.9 and 1604.9 Bs/Ha in relationship to the other studied species. Also, both grasses (bromus and pubescent) presented a marginal return of 138%; therefore, Orchard grass (Dactylis glomerata) is recommended as an alternative species.
| Identifer | oai:union.ndltd.org:BGMYU2/oai:scholarsarchive.byu.edu:etd-6418 |
| Date | 01 January 2006 |
| Creators | Paye Paye, Freddy Óscar |
| Publisher | BYU ScholarsArchive |
| Source Sets | Brigham Young University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Theses and Dissertations |
| Coverage | La Paz (Bolivia) |
| Rights | http://lib.byu.edu/about/copyright/ |
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