| TÃtulo : |
Efecto de la variación del suelo en la presencia de leguminosas en mejoramientos de campo natural |
| Tipo de documento: |
texto impreso |
| Autores: |
Luciano Irrigaray Pivetta, Autor ; Santiago MartÃn Bove Bettega, Autor ; Ignacio Bonomi Mangarelli, Autor |
| Editorial: |
Fca - Ude |
| Fecha de publicación: |
2020 |
| Número de páginas: |
80 p. |
| Nota general: |
Tutor: Cardozo, Gerónimo
|
| Idioma : |
Español (spa) Idioma original : Español (spa) |
| Palabras clave: |
Campo natural, Mejoramiento de campo Leguminosa, Nitrógeno, Fósforo |
| Resumen: |
Most of Uruguay´s native grasslands have very low legume species
production and a marked seasonal variation, which limit animal productivity.
Improved Native Grasslands (ING) are an excellent option at farm level to
overcome some of the native grassland’s limitations due to ease of
implementation, durability and low cost. Soil pH and phosphorus (P),
potassium (K) and nitrogen (N) available levels are known to limit legumes
development and biological nitrogen fixation, therefore, identifying the
variations of these nutrients within the same soil or management unit is
essential to enhance their development. This research aimed to study the role
of soil factors and nutritional status of the plants, on the variation of legumes
development within the same ING paddock and between different regions of
the country. Six ING paddocks in different departments (Florida, Treinta y
Tres, Rocha, Rio Negro, Rivera and Paysandú) were sampled in spring 2018,
in different types of soils (San Gabriel-Guaycurú, Alférez, India Muerta, Paso
Palmar, Masoller and Queguay Chico). Soil samples were taken from 0-15 cm
deep and analyzed for pH, P and K. Different botanical components were
separated, and N and P content analyzed. For the variables analyzed (pH, P,
K in soil and N and P in plant) variability was generally higher between sites
than within sites, with some exceptions. Spatial variability was not possible to
model for any of the sites or variables. The N and P nutrient level of legumes
measured by the N:P ratio compared to the N content of the rest of the
community (non-legume) explained between 35% and 41% of the legume
level present in the ING. Soil pH and P explained a minimal proportion of the
legume level in the ING, less than 25% of the variability, but was highly
affected by one sampling site. Soil K was not related to legume availability.
Higher levels of legume were also observed in environments with greater
availability of N (% N from the rest of the community, non-legume), unlike that
reported by the bibliography for cultivated pastures.
|
Efecto de la variación del suelo en la presencia de leguminosas en mejoramientos de campo natural [texto impreso] / Luciano Irrigaray Pivetta, Autor ; Santiago MartÃn Bove Bettega, Autor ; Ignacio Bonomi Mangarelli, Autor . - Fca - Ude, 2020 . - 80 p. Tutor: Cardozo, Gerónimo
Idioma : Español ( spa) Idioma original : Español ( spa)
| Palabras clave: |
Campo natural, Mejoramiento de campo Leguminosa, Nitrógeno, Fósforo |
| Resumen: |
Most of Uruguay´s native grasslands have very low legume species
production and a marked seasonal variation, which limit animal productivity.
Improved Native Grasslands (ING) are an excellent option at farm level to
overcome some of the native grassland’s limitations due to ease of
implementation, durability and low cost. Soil pH and phosphorus (P),
potassium (K) and nitrogen (N) available levels are known to limit legumes
development and biological nitrogen fixation, therefore, identifying the
variations of these nutrients within the same soil or management unit is
essential to enhance their development. This research aimed to study the role
of soil factors and nutritional status of the plants, on the variation of legumes
development within the same ING paddock and between different regions of
the country. Six ING paddocks in different departments (Florida, Treinta y
Tres, Rocha, Rio Negro, Rivera and Paysandú) were sampled in spring 2018,
in different types of soils (San Gabriel-Guaycurú, Alférez, India Muerta, Paso
Palmar, Masoller and Queguay Chico). Soil samples were taken from 0-15 cm
deep and analyzed for pH, P and K. Different botanical components were
separated, and N and P content analyzed. For the variables analyzed (pH, P,
K in soil and N and P in plant) variability was generally higher between sites
than within sites, with some exceptions. Spatial variability was not possible to
model for any of the sites or variables. The N and P nutrient level of legumes
measured by the N:P ratio compared to the N content of the rest of the
community (non-legume) explained between 35% and 41% of the legume
level present in the ING. Soil pH and P explained a minimal proportion of the
legume level in the ING, less than 25% of the variability, but was highly
affected by one sampling site. Soil K was not related to legume availability.
Higher levels of legume were also observed in environments with greater
availability of N (% N from the rest of the community, non-legume), unlike that
reported by the bibliography for cultivated pastures.
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