Luís César Dias Drumond

Produção de matéria seca em pastagem de Tifton 85 irrigada, com diferentes doses de dejeto líquido de suíno

Liquid swine dejection (LSD) can constitute excellent source of fertilization in pasture, with sprinkler irrigation system, provided the conditions that assure the protection of the environment. Although with proved potential for growth without irrigation, for the Cynodon sp cultivar Tifton 85 there is little information on its behavior and production in systems under irrigation and with LSD. In order to determine the production of dry matter in irrigated and with LSD fertirrigation, an experiment was carried out in the Farm-School of the University of Uberaba - MG, Brazil, with net-sprinkler irrigation system, applying 0, 50, 100 and 200 m3 ha-1 year-1of LSD. There was significant effect among the doses of LSD in the production of dry matter, occurring additions of production with the increasing the doses. The supply of 200 m3 ha-1 year-1 of LSD made possible the production of 5,928 kg of the forage dry matter for the cycle of 28 days.

Análise de risco de contaminação de águas superficiais e subterrâneas por pesticidas em municípios do Alto Paranaíba - MG

A preliminary analyses of the possible contamination of surface and groundwater by the active ingredients of the pesticide products used in the areas with intensive agricultural activities of Alto Paranaiba region, MG, Brazil, was carried out. The active ingredients and formulated products most used in the region were identified and their characteristics of environmental importance were presented. The EPA screening criteria, the groundwater ubiquity score (GUS) and the criteria proposed by Goss were used to evaluate which pesticides might contaminate the local waters. Among the active ingredients studied, several present risks to the local aquatic environment.

Avaliação do uso de fertilizantes organominerais e químicos na fertirrigação do cafeeiro irrigado por gotejamento

In order to evaluate coffee fertigation using different sources of mineral and organic fertilizers, comparing with conventional application, an experiment was installed in the Experimental Field -Fazenda Escola-, Uberaba in the State of Minas Gerais, Brazil, in a sandy soil, 850 m of altitude, with coffee -Catuai Vermelho IAC 144-. The following treatments were applied: chemical conventional top dressing; top dressing with conventional fertilizers, through fertigation; top dressing manuring with appropriate fertilizers for fertigation; solid organomineral fertilizers, through soil and liquid organomineral fertilizers, through fertigation. For comparison purposes, the same amounts of N, P2O5 and K2O were maintained for the different treatments. Irrigation control was accomplished by using a automatic weather station. After four harvests, it may be concluded that the sources of fertilizers used, in fertigation and in conventional application in the soil, did not show significant effects in coffee yield. Regarding the final quality of the coffee, appraised by the sensorial test in different treatments. No significant differences were verified among the treatments.

Uniformidade de distribuição superficial e subsuperficial de água e de água residuária de suinocultura com irrigação por aspersão em malha

The net-sprinkler irrigation is frequently being used in coffee, pasture, sugar cane forage and forages, due low cost system, easy installation and handling, allowing fertigation with wastewater of swine and bovine. Aiming to determine the water and wastewater of swine distribution uniformity with this irrigation system, an experiment was carried out at Uberaba University - Brazil, being used pluviometers among four sprinklers of two lateral lines. The Christiansen´s uniformity coefficient (CUC) and the uniformity distribution coefficient (UDC) were superior to the minimum recommended values, even with 200 m3 ha-1 year-1 of swine wastewater.

RELAÇÕES ENTRE INSTITUIÇÕES PÚBLICAS E PRIVADAS NA GERAÇÃO DE DESENVOLVIMENTO SUSTENTÁVEL: POTENCIALIDADES E LIMITAÇÕES DA REGIÃO DO ALTO PARANAÍBA – MG

O estudo objetivou mostrar dentro do contexto atual as potencialidades e limitacoes que circundam as parcerias existentes entre as organizacoes publicas e privadas localizadas na regiao do Alto Paranaiba, Minas Gerais. Foram incorporados a discussao elementos que possam caracterizar acoes e iniciativas, entre o publico e o privado, voltadas ao desenvolvimento sustentavel da regiao pesquisada. Para isso, informacoes oriundas do Zoneamento Ecologico-Economico do Estado de Minas Gerais (ZEE-MG) contribuiram significativamente para analise dos dados e informacoes coletadas. Nesse contexto, foi possivel identificar grande potencial para desenvolvimento do agronegocio, alem da riqueza em recursos hidricos e da biodiversidade existente. Tais fatores propiciam o crescimento economico da regiao, servindo de parâmetro para se pensar ao mesmo tempo em desenvolvimento sustentavel. Sendo assim, varios foram os componentes institucionais pesquisados nos 31 municipios pertencentes ao Alto Paranaiba, podendo ser vistos como potenciais geradores de politicas publicas e parcerias voltadas para a sustentabilidade da regiao. Os resultados encontrados apontaram para cenarios de potencialidades e limitacoes, desafios e expectativas, mas alertando para o continuo e ininterrupto monitoramento do meio ambiente da regiao. As Consideracoes do estudo nos permitem em primeiro plano destacar a funcao social das organizacoes estudadas, principalmente em relacoes coletivas ou por meio de redes institucionais e segundo, algumas evidencias encontradas ate entao, permitiram a incorporacao de novas questoes e objetivos especificos ao estudo, contribuindo atualmente para futuras questoes ambientais