No abstract

Polycultures from broadleaves with tuberoses are being used in vegetable crop production systems in the semiarid region of Potiguar. The challenge is to determine whether these systems are productively viable when fertilized with organic matter produced by spontaneous species of the Caatinga biome. The objective of this study was to evaluate the agro-economic performance of arugula (A), carrot (C), and coriander (Co) polycultures fertilized with hairy woodrose biomass incorporated into the soil under different population densities among the component crops. The experimental design was a randomized complete block with four replications, with the treatments arranged in a 4 × 4 factorial scheme, from the combination of four amounts of hairy woodrose biomass incorporated into the soil (7.5, 15.0, 22.5, and 30.0 t ha-1 on a dry matter basis), with four population densities (20A-50C-20Co%, 30A-50C-30Co%, 40A-50C-40Co%, and 50A-50C-50Co% of the recommended population in the single crop). The efficiency of polycultures was evaluated through indexes and agro-economic indicators. The most productive agro-economic performance was obtained with a biomass of 18.21 t ha-1 of hairy woodrose incorporated in the soil and a population density of 50A-50C-50Co%.

Resumo -Este trabalho teve como objetivo avaliar as famílias da parte baixa da bacia hidrográfica do riacho Faé, a partir do modelo agrícola rural existente, utilizando análise multivariada. Foram aplicados questionários do tipo "cross over", com perguntas abertas e fechadas, para a caracterização sócio-econômica e ambiental da região estudada. Para observar as similaridades entre as famílias estudadas aplicou-se a técnica de análises de Agrupamento Hierárquico aos dados. A análise definiu dois grupos bem distintos. O grupo I foi formado por famílias com características tipicamente rurais, envolvendo famílias de baixa renda que desenvolvem as suas atividades produtivas de maneira rudimentar, com o uso de agrotóxicos representando sérios riscos à sustentabilidade do modelo agrícola e, principalmente, à vida dessas famílias. O grupo II demonstrou famílias que, embora localizadas em meio rural, apresentaram características tipicamente urbanas, caracterizadas pela faixa etária predominante jovem, baixa escolaridade e atividade econômica não agrícola. A análise de agrupamento se mostrou eficiente para a distinção dos grupos de famílias homogêneas na área estudada, independentemente de sua localização geográfica. Palavras-chave -Sustentabilidade Ambiental. Análise multivariada. Bacia Hidrográfica.Abstract -This study aimed to evaluate the families living in the part of the stream Faé watershed. It was based on the existing agricultural model and it was used the multivariate analysis. Forms "cross-over" types with subjective and objective questions were applied for socio-economic and environmental study area. To observe the similarities between the studied families applied Hierarchical Cluster Analysis to data. It was identified two distinct groups. Group I was formed by families with characteristics typically agriculturalist with low income families developing their productive activities in a rudimentary way. Those families use pesticides and they represent a risk both to support agricultural model and to the lives of those families. Group II was formed by families who, even so located in agricultural environment, present typically urban characteristics. In those families there are many young people, many people with low level of schooling and they have no agricultural economic activity. Cluster analysis was efficient to separate the homogeneous groups of families in the study area regardless of geographic location.