Dinamica y manejo de poblaciones de malas hierbas

Saavedra, Milagros Saavedra

doi:10.1590/s0100-83581994000100005

Cited by 6 publications

(7 citation statements)

References 9 publications

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“…The studies on population dynamics have the objective to determine their sizethroughout time and factors that influence their size (Saavedra, 1994). In agroecossystems,where the soil is disturbed frequently, the soil seed bank acts to stabilize and ensure species survival (Roberts, 1981).…”

Section: Dynamics Of Soil Seed Banksmentioning

confidence: 99%

Soil seed banks

Christoffoleti

Caetano²

1998

Sci. agric. (Piracicaba, Braz.)

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The goal of this literature review is to discuss some of the major aspects of the soil seed bank, from its characteristics down to methodological aspects of its determination. Soil seed bank is the reservoir of viable seeds or of vegetative propagules that are present in the soil and that are able to recompose a natural vegetation. In the agroecossystems the soil seed bank is related to weeds, and the knowledge of its size and composition in terms of species can be used in the prediction of future infestations, to built simulation models of population establishment through time and also the definition of soil and cultural management programs, in order to have a rational use of herbicides. Key Words: weed, soil seed bank, population dynamics BANCO DE SEMENTES DO SOLO RESUMO: O objetivo desta revisão é discorrer sobre alguns pontos importantes no estudo do banco de sementes no solo, desde as sua características até aspectos metodológicos para sua determinação. Denomina-se de banco de sementes a reserva destas ou de propágulos vegetativos viáveis presentes no solo e que são capazes de recompor uma vegetação. Nos sistemas agrícolas o banco está relacionado com o estudo das plantas daninhas; o conhecimento do seu tamanho e das espécies que o compõem poderá ser utilizado na previsão de infestações futuras, na construção de modelos de estabelecimentos populacionais no tempo e consequentemente na definição de programas de manejo de solo e culturais, visando racionalizar a utilização de herbicidas. Descritores: planta daninha, banco de sementes, dinâmica de populações

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Section: Dynamics Of Soil Seed Banksmentioning

confidence: 99%

Soil seed banks

Christoffoleti

Caetano²

1998

Sci. agric. (Piracicaba, Braz.)

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“…The expansion and intensification of agricultural practices, which has also affected olive farms, have led to landscape simplification and a reduction in SNH, and caused a loss of biodiversity [ 30 , 31 ]. Vegetation cover management in olive farms mostly consists of tillage and/or herbicide application to minimize competition for water resources and nutrients between the cover vegetation and olive trees [ 32 , 33 ]. Although the combination of intense precipitation events and bare soil can cause nutrient and soil loss, olive farmers generally do not perceive any short-term yield reduction as a result due to the benefits they derive from mechanical management techniques and the provision of agrochemical inputs [ 33 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Vegetation Cover Management and Landscape Plant Species Composition Influence the Chrysopidae Community in the Olive Agroecosystem

Herrera

García-Fuentes

Ramos-Font

et al. 2022

Plants

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Habitat manipulation through the promotion of semi-natural habitats such as cover and patch vegetation is a possible means of offsetting the negative impacts of the agricultural practices. A baseline situation is crucial before any successful habitat manipulation is attempted. We studied the effects that current vegetation cover management practices have on plant composition and the potential attraction that the plant families from the semi-natural habitats could have on the Chrysopidae community, a key pest control agent, in five olive farms in Granada (Spain). Vegetation cover was assessed using a point quadrat methodology in eight transects per farm. In addition, the patch vegetation was characterized with 60 transects using a line intercept methodology. The woody patch vegetation and olive tree canopies were vacuumed using a field aspirator to collect adult Chrysopidae. In the cover vegetation we observed great variability in both the richness and diversity of plant communities caused by the vegetation cover management techniques and the transect position (in the middle of the rows or beneath the tree canopy). The plant families with the greatest plant cover were the Asteraceae and Fabaceae, where Asteraceae was favoured by tillage and Fabaceae by grazing, while in the patch vegetation, the predominant families were the Rosaceae and Fagaceae. Our results indicate that the genus Chrysoperla was mostly correlated with the Plantaginaceae, Brassicaceae and Asteraceae plant families in the cover vegetation, and with the Caryophyllaceae and Rosaceae families in the patch vegetation. The genera Apertochrysa and Pseudomallada were associated with the families Malvaceae and Poaceae in the cover vegetation, and with the families Cupressaceae, Poaceae and Pinaceae in the patch vegetation. Our study shows to the farmers the possibilities of vegetation cover management to select plant families for the cover vegetation.

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“…The globally use of these products contributes to socio-economic and cultural development of the olive-growing regions. The traditional agricultural practices for Mediterranean olive groves are based on a low density of trees, with two or three trunks each, weed control by tillage and chemical treatment (Saavedra and Pastor, 2002). Although in recent years, the planting density has increased and irrigation has been introduced in many areas, tillage still is one of the most generalized practices in the olive grove.…”

Section: Introductionmentioning

confidence: 99%

“…Although in recent years, the planting density has increased and irrigation has been introduced in many areas, tillage still is one of the most generalized practices in the olive grove. However, no-tillage practices reveal several benefits regarding to tillage, including increased yield (Saavedra and Pastor, 2002).…”

Section: Introductionmentioning

confidence: 99%

Olive Yields Forecasts and Oil Price Trends in Mediterranean Areas: A Comprehensive Analysis of the Last Two Decades

et al. 2016

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SUMMARYThe main objective of this research was to utilize pollen monitoring methodology to predict olive yields in three Mediterranean olive cultivation areas (Spain, Italy and Tunisia) and their relationships with the olive oil price dynamics. Moreover, olive yield and olive oil production compared with olive oil price trends in the last two decades was evaluated. The statistical analyses confirmed that biological parameters such as the pollen emission, the pollen season start (Pss), the full flowering (Ff) date or the pollen season length (Psl) showed positive correlation values with productive parameters, especially the Pollen Index (Pi). However, the difficulty to define clear relationships with oil price for optimizing the marketing strategies can be due to the olive sector European policy and to the complex international olive oil market situation. The occurrence of unharvested trees was increased and the reduction in agricultural operations as well as non-harvesting could become more widespread above all in traditional extensive systems.

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Dinamica y manejo de poblaciones de malas hierbas

Cited by 6 publications

References 9 publications

Soil seed banks

Soil seed banks

Vegetation Cover Management and Landscape Plant Species Composition Influence the Chrysopidae Community in the Olive Agroecosystem

Olive Yields Forecasts and Oil Price Trends in Mediterranean Areas: A Comprehensive Analysis of the Last Two Decades

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