Forage production in natural and afforested grasslands of the Pampas ecological complementarity and management opportunities
In managed rangelands periods of low primary productivity determine troughs of forage availability, constraining animal production year-round. Although alternative tools to increase forage availability during critical seasons exists, most of them are unaffordable and short-lived in marginal areas. W...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2011Nordenstahl.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 245 | 1 | 0 | |a Forage production in natural and afforested grasslands of the Pampas |b ecological complementarity and management opportunities |
| 520 | |a In managed rangelands periods of low primary productivity determine troughs of forage availability, constraining animal production year-round. Although alternative tools to increase forage availability during critical seasons exists, most of them are unaffordable and short-lived in marginal areas. We explore the potential benefits of deciduous tree plantations favoring winter forage productivity by comparing aboveground net primary productivity [ANPP] patterns in herbaceous understory to tree plantations and natural grasslands in the Pampas [Argentina]. These temperate subhumid grasslands are characterized by the coexistence of winter species, mainly C3 grasses of the native genera Stipa, Piptochaetium, and Bromus and the exotic genera Lolium and Festuca] and summer species [mainly C4 grasses of the native genera Paspalum, Bothriochloa, and Stenotaphrum] that replace each other throughout the seasons, with domination of the latter. We hypothesize that the natural decoupling of growing seasons between winter deciduous trees and winter grasses could provide the basis for the sustainable promotion of winter forage. We measured ANPP on two 23-year-old Populus deltoides plantations and their understory and compared them with adjacent open grasslands. Afforested stands had 55-75 percent higher annual ANPP than their non-afforested neighbors, with trees contributing &70 percent to total ANPP. Herbaceous canopies beneath plantations achieved about half of the ANPP observed in non-afforested situations with a contrasting seasonal distribution associated with shifts from C4 to C3 grass dominance. Winter ANPP, the most critical source of forage in these grazing systems, was similar or higher in the herbaceous understory of tree plantations to that on their non-afforested counterparts, suggesting that mixed systems involving deciduous trees and understory pastures are a valid and viable option in the region. | ||
| 653 | 0 | |a ABOVEGROUND NET PRIMARY PRODUCTIVITY | |
| 653 | 0 | |a C3 AND C4 GRASSES | |
| 653 | 0 | |a FLOODING PAMPAS | |
| 653 | 0 | |a POPULUS DELTOIDES | |
| 653 | 0 | |a SILVOPASTORAL SYSTEM | |
| 653 | 0 | |a AFFORESTATION | |
| 653 | 0 | |a AGRICULTURAL PRODUCTION | |
| 653 | 0 | |a C3 PLANT | |
| 653 | 0 | |a C4 PLANT | |
| 653 | 0 | |a COEXISTENCE | |
| 653 | 0 | |a DECIDUOUS TREE | |
| 653 | 0 | |a FORAGE | |
| 653 | 0 | |a GRASS | |
| 653 | 0 | |a GRASSLAND | |
| 653 | 0 | |a GRAZING MANAGEMENT | |
| 653 | 0 | |a GROWING SEASON | |
| 653 | 0 | |a HERB | |
| 653 | 0 | |a HUMID ENVIRONMENT | |
| 653 | 0 | |a NATIVE SPECIES | |
| 653 | 0 | |a NET PRIMARY PRODUCTION | |
| 653 | 0 | |a PASTURE | |
| 653 | 0 | |a PLANTATION | |
| 653 | 0 | |a RANGELAND | |
| 653 | 0 | |a SUSTAINABLE DEVELOPMENT | |
| 653 | 0 | |a TEMPERATE ENVIRONMENT | |
| 653 | 0 | |a UNDERSTORY | |
| 653 | 0 | |a ARGENTINA | |
| 653 | 0 | |a PAMPAS | |
| 653 | 0 | |a ANIMALIA | |
| 653 | 0 | |a BOTHRIOCHLOA | |
| 653 | 0 | |a BROMUS | |
| 653 | 0 | |a FESTUCA | |
| 653 | 0 | |a LOLIUM | |
| 653 | 0 | |a PASPALUM | |
| 653 | 0 | |a PIPTOCHAETIUM | |
| 653 | 0 | |a POACEAE | |
| 653 | 0 | |a POPULUS DELTOIDES | |
| 653 | 0 | |a STENOTAPHRUM | |
| 653 | 0 | |a STIPA | |
| 700 | 1 | |9 18129 |a Nordenstahl, Marisa | |
| 700 | 1 | |9 28667 |a Gundel, Pedro Emilio | |
| 700 | 1 | |a Clavijo, María del Pilar |9 13046 | |
| 700 | 1 | |a Jobbágy, Esteban G. |9 7390 | |
| 773 | |t Agroforestry Systems |g vol.83, no.2 (2011), p.201-211 | ||
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| 900 | |a ^tForage production in natural and afforested grasslands of the Pampas^secological complementarity and management opportunities | ||
| 900 | |a ^aNordenstahl^bM. | ||
| 900 | |a ^aGundel^bP.E. | ||
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| 900 | |a ^aNordenstahl^bM. | ||
| 900 | |a ^aGundel^bP. E. | ||
| 900 | |a ^aClavijo^bM. P. | ||
| 900 | |a ^aJobbágy^bE. G. | ||
| 900 | |a ^aNordenstahl^bM.^tGrupo de Estudios Ambientales-IMASL, Universidad Nacional de San Luis and CONICET, San Luis, Argentina | ||
| 900 | |a ^aGundel^bP.E.^tIFEVA-Cátedra de EcologÃa, Facultad de AgronomÃa, Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina | ||
| 900 | |a ^aClavijo^bM.P.^tCátedra de Forrajicultura, Facultad de AgronomÃa, Universidad de Buenos Aires, Buenos Aires, Argentina | ||
| 900 | |a ^aJobbágy^bE.G.^tDepartamento de AgronomÃa-FICES, Universidad Nacional de San Luis, San Luis, Argentina | ||
| 900 | |a ^aOscar^bOscar^tGrupo de Estudios Ambientales-IMASL, Universidad Nacional de San Luis, Ejercito de los Andes 950, 5700 San Luis, Argentina | ||
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| 900 | |a Vol. 83, no. 2 | ||
| 900 | |a 211 | ||
| 900 | |a ABOVEGROUND NET PRIMARY PRODUCTIVITY | ||
| 900 | |a C3 AND C4 GRASSES | ||
| 900 | |a FLOODING PAMPAS | ||
| 900 | |a POPULUS DELTOIDES | ||
| 900 | |a SILVOPASTORAL SYSTEM | ||
| 900 | |a AFFORESTATION | ||
| 900 | |a AGRICULTURAL PRODUCTION | ||
| 900 | |a C3 PLANT | ||
| 900 | |a C4 PLANT | ||
| 900 | |a COEXISTENCE | ||
| 900 | |a DECIDUOUS TREE | ||
| 900 | |a FORAGE | ||
| 900 | |a GRASS | ||
| 900 | |a GRASSLAND | ||
| 900 | |a GRAZING MANAGEMENT | ||
| 900 | |a GROWING SEASON | ||
| 900 | |a HERB | ||
| 900 | |a HUMID ENVIRONMENT | ||
| 900 | |a NATIVE SPECIES | ||
| 900 | |a NET PRIMARY PRODUCTION | ||
| 900 | |a PASTURE | ||
| 900 | |a PLANTATION | ||
| 900 | |a RANGELAND | ||
| 900 | |a SUSTAINABLE DEVELOPMENT | ||
| 900 | |a TEMPERATE ENVIRONMENT | ||
| 900 | |a UNDERSTORY | ||
| 900 | |a ARGENTINA | ||
| 900 | |a PAMPAS | ||
| 900 | |a ANIMALIA | ||
| 900 | |a BOTHRIOCHLOA | ||
| 900 | |a BROMUS | ||
| 900 | |a FESTUCA | ||
| 900 | |a LOLIUM | ||
| 900 | |a PASPALUM | ||
| 900 | |a PIPTOCHAETIUM | ||
| 900 | |a POACEAE | ||
| 900 | |a POPULUS DELTOIDES | ||
| 900 | |a STENOTAPHRUM | ||
| 900 | |a STIPA | ||
| 900 | |a In managed rangelands periods of low primary productivity determine troughs of forage availability, constraining animal production year-round. Although alternative tools to increase forage availability during critical seasons exists, most of them are unaffordable and short-lived in marginal areas. We explore the potential benefits of deciduous tree plantations favoring winter forage productivity by comparing aboveground net primary productivity [ANPP] patterns in herbaceous understory to tree plantations and natural grasslands in the Pampas [Argentina]. These temperate subhumid grasslands are characterized by the coexistence of winter species, mainly C3 grasses of the native genera Stipa, Piptochaetium, and Bromus and the exotic genera Lolium and Festuca] and summer species [mainly C4 grasses of the native genera Paspalum, Bothriochloa, and Stenotaphrum] that replace each other throughout the seasons, with domination of the latter. We hypothesize that the natural decoupling of growing seasons between winter deciduous trees and winter grasses could provide the basis for the sustainable promotion of winter forage. We measured ANPP on two 23-year-old Populus deltoides plantations and their understory and compared them with adjacent open grasslands. Afforested stands had 55-75 percent higher annual ANPP than their non-afforested neighbors, with trees contributing &70 percent to total ANPP. Herbaceous canopies beneath plantations achieved about half of the ANPP observed in non-afforested situations with a contrasting seasonal distribution associated with shifts from C4 to C3 grass dominance. Winter ANPP, the most critical source of forage in these grazing systems, was similar or higher in the herbaceous understory of tree plantations to that on their non-afforested counterparts, suggesting that mixed systems involving deciduous trees and understory pastures are a valid and viable option in the region. | ||
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