Barrera, D.

Betancourt, L. L.

Chamorro, D. R.

Conde, A.

Jaramillo, C. J.

Umaña, A.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Establishment and Effects on Soil and Pasture of Diverse Arrangements of Acacia decurrens, Acacia melanoxylon and Alnus acuminata as Silvopasture Systems in the High Tropic in Colombia A. Conde Universidad de La Salle, Colombia L. L. Betancourt Universidad de La Salle, Colombia C. J. Jaramillo Universidad de La Salle, Colombia A. Umaña Universidad de La Salle, Colombia D. Barrera Universidad de La Salle, Colombia See next page for additional authors Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/10-2/35 The XXI International Grassland Congress / VIII International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. brought to you by COREView metadata, citation and similar papers at core.ac.ukprovided by University of KentuckyPresenter Information A. Conde, L. L. Betancourt, C. J. Jaramillo, A. Umaña, D. Barrera, and D. R. Chamorro This event is available at UKnowledge: https://uknowledge.uky.edu/igc/21/10-2/35 瞯 ]274　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　Grasslands/Rangelands Production Systems——— Integration of Crops , Forage and Forest SystemsEstablishment and effects on soil and pasture of diverse arrangements of Acacia decurrens ,Acacia melanoxylon and Alnus acuminata as silvopasture systems in the high tropic in ColombiaA .Conde 1 , L .L .Betancourt 1 . C .J . Jaramillo1 . A . Uma鼻a1 , D . Barrera1 and D .R . Chamorro21 Universidad de la Salle , Bogotá Colombia . E‐mail : aconde＠ lasalle .edu .co . 2 CorpoicaKey words : Silvopastoral systems , degradated pastures , carbohydrate fractions , protein fractionsIntroduction With the introduction of trees species into grass pastures , some of the expected benefits are : erosion control ,enhancement of soil chemical characteristics , more efficient utilization of the available water and increased microbial activity inshaded areas . If management factors and environmental conditions allow these effects to occur , there will also be increasedavailability of forage and crude protein in the system , particularly in drier periods ( Carvalho et al , ２００２) . The objective of thisstudy was to evaluate dasometric measures during establishment period and initial effects on soil and the availability and qualityof grass in two arrangements : live fences and tree dispersed in pasture in the high tropic in Colombia .Material and methods Three species of trees were planted in a hill pasture with Pennisetum clandestinum near to Sopo ,Colombia ( ７３° ５７′ O , ４° ５４′ N ) , ２５８０ meters mean altitude , １４ ° C , mean rainfall ６９３ mm/ year , in two differentarrangements : A ) single row of two meters spaced trees like a live fence and B) dispersed trees in a pasture １０ × ５ m , each linewith one specie . Dasometric measures were : average height , basal diameter and diameter at ４０ cm height , Three treatmentswere imposed : １) .A cacia decurrens ( Ad) ２ ) . A cacia melanoxy lon ( Am ) and ３ ) . A lnus acuminata . ( Aa) in a randomizedcomplete block design with ６ replicates . Changes in soil and availability of forage and its quality were measured ( Licitra et al ,１９９６ ; Sniffen et al , １９９２) .Results Best grow th was achieved by Ad and Am compared with Aa ( p ＜ ０ .０５) . In all dasometric measures were not differentbetween Ad and Am ( Table １ ) but A lnus acuminata produced lower means values than acacias ( p ＜ ０ .０５) .Table 1 A verage height (m) o f three dispersed trees in pasture 10 × 5 .Month A lnus acuminata A cacia Melanox ylon A cacia decurrensAugust( Planting ) ０ 妹.７３５ ± １ .８０b ０ 噜.８８７ ± ３ .０１a ０ x.８６４ ± ３ .２９aSeptember ０ 妹.９３１ ± ２ .９３b １ 噜.０６４ ± ４ .１５a １ x.０８８ ± ３ .２７aOctober １ 妹.１０４ ± １ .９８b １ 噜.３６５ ± ２ .５２a １ x.３９０ ± ３ .００aNovember １ 妹.１３８ ± １ .９５b １ 噜.４６６ ± ２ .０５a １ x.５２０ ± ２ .６６aDecember １ 妹.１７９ ± １ .９２b １ 噜.５２１ ± １ .３８a １ x.６４１ ± ２ .１６aJanuary １ 妹.２２０ ± １ .４３b １ 噜.５８１ ± １ .６１a １ x.７２６ ± １ .９７aMeans ,± s .e .m . Means followed by the same letter in columns do not differ ( p ＜ ０ .０５) . Months from ２００５ to ２００６ .Pastures with trees did not differ in soil chemical characteristic compared with pastures without trees . Availability of forage washigher in pastures with trees dispersed １０ × ５ ( ７２０ g of dry matter /m2 ) compared with pastures without trees ( ６４９ g of drymatter /m2 ) .Carbohydrates and protein fractions in grass did not differ with or without trees in the pastures ( p ＞ ０ .０５) .Conclusions Based on dasometric measures Acacia decurrens and Acacia melanoxylon grew faster and performed better than thenative Alnus acumminata in the reported ecosystem .The long term effects of planting trees on nutrient quality of grass ( protein and carbohydrate fractions) and soil characteristicsmay be cumulative and need further research .ReferencesCarvalho M .M . , Alvim M .J and Xavier D .F . ( ２００２ ) . International Symposium on Silvopastoral Systems and Second Congresson Agroforestry and Livestock Production in Latin America . http :/ / www . f ao . org / WA IRDOCS / LEA D /X6109E/x6109e03 . H tml .Licitra G . , Hernandez T .M . and Van Soest P .J . Standardization of procedures for nitrogen fractional of ruminant feeds .A nim . Feed Sci . Technol . ５７ : ３４７‐３５８ .Sniffed C .J . O�Connor J .D . , Van Soest P . J . , Fox D .G . and Russell J .B . １９９２ . Net Carbohydrate and protein system forevaluating cattle diets : I Carbohydrate and protein availability J . A nim . Sci . ７０ : ３５６２‐３５７７ .

Establishment and Effects on Soil and Pasture of Diverse Arrangements of \u3ci\u3eAcacia decurrens\u3c/i\u3e, \u3ci\u3eAcacia melanoxylon\u3c/i\u3e and \u3ci\u3eAlnus acuminata\u3c/i\u3e as Silvopasture Systems in the High Tropic in Colombia

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=3384&amp;context=igc

Establishment and Effects on Soil and Pasture of Diverse Arrangements of \u3ci\u3eAcacia decurrens\u3c/i\u3e, \u3ci\u3eAcacia melanoxylon\u3c/i\u3e and \u3ci\u3eAlnus acuminata\u3c/i\u3e as Silvopasture Systems in the High Tropic in Colombia

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