Weed dynamics under three management techniques in forest restoration

Autor: Ribeiro, Ju?ara Garcia
Přispěvatelé: Leles, Paulo S?rgio dos Santos, Resende, Alexander Silva de, Abreu, Rodolfo Cesar Real de
Jazyk: portugalština
Rok vydání: 2020
Předmět:
Zdroj: Biblioteca Digital de Teses e Dissertações da UFRRJ
Universidade Federal Rural do Rio de Janeiro (UFRRJ)
instacron:UFRRJ
Popis: Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2023-01-10T19:53:35Z No. of bitstreams: 1 2020 - Ju?ara Garcia Ribeiro.pdf: 1535915 bytes, checksum: 95ce9e3d6f1d02977a972ce4709c95ff (MD5) Made available in DSpace on 2023-01-10T19:53:35Z (GMT). No. of bitstreams: 1 2020 - Ju?ara Garcia Ribeiro.pdf: 1535915 bytes, checksum: 95ce9e3d6f1d02977a972ce4709c95ff (MD5) Previous issue date: 2020-02-20 CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior The fragmentation of natural ecosystems is one of the main consequences of the anthropic impacts caused by the search for areas for the development of agriculture and livestock, causing significant losses of biodiversity. Within this scenario, the Atlantic Forest is found, one of the most important biomes for the conservation of biodiversity in the world, as it presents high wealth and a high number of endemic species. A fact that makes forest restoration projects essential to mitigate habitat loss and fragmentation. One of the most critical and costly stages of forest restoration projects is the control of weeds, with prior knowledge of the species present in the area being essential, as they may show tolerance and resistance to herbicides, a high degree of regrowth, growth habit and distinct life cycle. The dynamics of weeds encompasses processes involving the biology of species such as the life cycle and their processes of interaction with cultivated species, through competition for resources such as water, nutrients, space and light, necessary for the growth and development of plants. Studies of weed communities are essential for management programs since vegetation is strongly influenced by the imposed cultural treatments. Thus, it is essential to recognize species, to promote more appropriate management methods, considering the financial and environmental costs involved. To understand the dynamics of weed populations, it is important to analyze the phytosociology of the community, the phytosociological indices allow us to know which weeds are most important within the weed community, and from them it is possible to define what will be done, how and when, a Since the infestation conditions are heterogeneous, there are several management methods. A fragmenta??o dos ecossistemas naturais ? uma das principais consequ?ncias dos impactos antr?picos provocados pela busca de ?reas para o desenvolvimento da agricultura e pecu?ria, ocasionando perdas significativas de biodiversidade. Dentro deste cen?rio, encontra-se a Mata Atl?ntica, um dos biomas mais importantes para a conserva??o da biodiversidade do mundo por apresentar alta riqueza e elevado n?mero de esp?cies end?micas. Fato que torna os projetos de restaura??o florestal imprescind?veis para amenizar as perdas e fragmenta??o de habitats. Uma das etapas mais cr?ticas e onerosas dos projetos de restaura??o florestal ? o controle de plantas daninhas, sendo fundamental o conhecimento pr?vio das esp?cies presentes na ?rea, j? que estas podem apresentar toler?ncia e resist?ncia a herbicidas, alto grau de rebrotas, h?bito de crescimento e ciclo de vida distintos. A din?mica de plantas daninhas abrange os processos envolvendo a biologia das esp?cies como o ciclo de vida e seus processos de intera??o com as esp?cies cultivadas, atrav?s da competi??o por recursos como a ?gua, nutrientes, espa?o e luz, necess?rios para o crescimento e desenvolvimento das plantas. Os estudos de comunidades de plantas daninhas s?o fundamentais para os programas de manejo j? que a vegeta??o ? fortemente influenciada pelos tratos culturais impostos. Dessa forma, ? fundamental fazer o reconhecimento das esp?cies, para promover m?todos de manejo mais adequados, considerando os custos financeiros e ambientais envolvidos. Para compreender a din?mica das popula??es de plantas daninhas ? importante analisar a fitossociologia da comunidade, os ?ndices fitossociol?gicos permitem conhecer quais as plantas daninhas mais importantes dentro da comunidade infestante, e a partir delas ? poss?vel definir o que ser? feito, como e quando, uma vez que as condi??es de infesta??o s?o heterog?neas, existindo diversos m?todos de manejo.
Databáze: OpenAIRE
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