Adopting a Si supply strategy can amplify the sugarcane response. Thus, this study aimed to verify whether Si supply in the pre-sprouted seedling (PSS) formation phase would have an effect after field transplanting similar to Si supply only in the field phase (via foliar spraying or fertigation). Furthermore, this study aimed to verify whether Si supply in the PSS formation phase associated with Si fertigation after transplanting can potentiate or amplify Si benefits. Two experiments were conducted. In experiment I, pre-sprouted seedlings were grown in a nursery without Si (Control) and with Si. Experiment II was conducted in the field on Eutrustox soil with the following treatments: no Si supply (Control); Si supplied during the PSS formation phase; Si supplied through foliar spraying in the field; Si supplied through fertigation in the field; Si supplied in the PSS formation phase and during field development. Silicon used in both crop phases benefited sugarcane by increasing photosynthetic pigment content and the antioxidative defense system. The innovation of Si management to be supplied via fertigation integrated with both crop phases (PSS and in the field) optimizes the element’s use by increasing the crop's productivity and sustainability.

As hortaliças são alimentos reguladores, importante para o bom funcionamento do organismo. Objetivou-se neste trabalho determinar a caracterização físico-química de hortaliças folhosas comercializadas em supermercados do município de Jaboticabal – São Paulo. As hortaliças tipo folha “couve, almeirão e chicória” analisadas no presente trabalho, foram adquiridas em dois supermercados do município de Jaboticabal e encaminhadas ao laboratório de biomassa I, UNESP – FCAV, Câmpus de Jaboticabal-SP, onde foram realizadas as seguintes análises: pH, acidez titulável, cinzas, umidade, teor de nitrogênio e proteína. O almeirão apresentou maior teor de umidade com 94,74 %, seguido da couve e chicória, com 88,81% e 82,28 %, respectivamente. Os valores de cinzas, acidez titulável, nitrogênio e proteínas das hortaliças, apresentaram percentuais satisfatórios. Entretanto, apesar dos teores dos componentes físico-químicos está dentro dos padrões estabelecidos na tabela brasileira de composição de alimentos, cabe ao consumidor de hortaliças, fazer a aquisição das mesmas, levando em consideração a data da comercialização, os aspectos da aparência global e a forma em que as mesmas se encontram armazenadas.

Adopting a Si supply strategy can amplify sugarcane response. Thus, this study aimed to verify whether Si supply in the pre-sprouted seedling (PSS) formation phase would have an effect after field transplanting similar to Si supply only in the field phase (via foliar spraying or fertigation), and whether Si supply in the PSS formation phase associated with Si fertigation after transplanting can potentiate or amplify Si benefits. Two experiments were conducted. In experiment I, PSS were grown in nursery without Si (Control) and with Si. Experiment II was conducted in the field on Eutrustox with the following treatments: no Si supply (Control); Si supplied during the PSS formation phase; Si supplied through foliar spraying in the field; Si supplied through fertigation in the field; and Si supplied in the PSS formation phase and during field development. Silicon use in both crop phases benefited sugarcane by increasing photosynthetic pigment content and the antioxidative defense system. The innovation of Si management to be supplied via fertigation integrated in both crop phases (PSS and in the field) optimizes the element use by increasing the crop's productivity and sustainability.

The objective of this study was to evaluate the composting process made from different combinations of organic residues and to gain agronomic knowledge about the final product. The experimental design was randomized blocks, with five treatments: T1-50% sawdust, 35% fruit / vegetable husks and 15% coffee grounds and filter; T2-50% sawdust, 30% fruit / vegetable peels and 20% coffee grounds and filter; T3-60% sawdust, 30% fruit / vegetable peel and 10% coffee grounds and filter; T4-60% sawdust, 20% fruit / vegetable peels and 20% coffee grounds and filter; and T5-70% sawdust, 20% fruit / vegetable peels and 10% coffee grounds and filter and four replicates. The parameters monitored daily were temperature and humidity. After 140 days of initiation, the sample was collected for analysis. The material was analyzed in the soil and leaf fertility laboratory of the UEMG Unit Passos to determine the organic matter content, C / N ratio, pH and macronutrient and micronutrient content. Treatments 1 and 2 presented the best values in relation to the other treatments, due to the lower percentage of sawdust. The low ambient temperatures in the composting process, the high C / N ratio of the sawdust, the proportion of residues used in the formation of the compost and the volume of the material may have had a negative influence on the composting process.

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