RESUMOAtualmente, mudas de diversas fruteiras são produzidas no cultivo protegido, com o uso de substratos aliados a adubações. Há necessidade de substrato de fácil aquisição e que proporcione mudas de boa qualidade. Sendo assim, o objetivo deste trabalho foi avaliar diferentes substratos comerciais e doses de nitrogênio sobre o desenvolvimento de mudas de maracujazeiro em condições protegidas. Os tratamentos consistiram de três substratos comerciais (Bioplant ® , Fibra de coco e Vivato ® ) e quatro doses de nitrogênio (0; 150; 300 e 600 mg dm -³ N). Após 120 dias, avaliou-se a altura de planta, número de folhas, peso da matéria seca de parte aérea (MSPA), raizes (MSR) e total (MST) e o teor de clorofila (SPAD). Na altura das plantas, a Fibra de Coco diferiu significativamente dos demais substratos. A altura máxima de 122 cm foi obtida na dose de 600 mg dm -³ de N. No número de folhas a Fibra de coco proporcionou a melhor resposta com média de 20 folhas, sendo superiores Bioplant ® e Vivatto ® . Na MSPA a Fibra de Coco e Bioplant ® foram superiores em relação ao Vivatto ® , e na avaliação de MST observou-se o acúmulo máximo de 19 g de matéria seca das mudas na dose de 600 mg dm -³ de N nas plantas desenvolvidas com Bioplant ® . No teor de clorofila os melhores resultados foram obtidos no substrato Bioplant ® com média de valores SPAD de 40, mas não houve diferença para a Fibra de coco. Palavras-chave: cultivo protegido; nitrogênio; nutrição mineral; Passiflora edulis Sims.
SUBSTRATE AND NITROGEN FERTILIZER ON SEEDLING PRODUCTION OF YELLOW PASSION FRUIT IN PROTECTED CONDITIONS ABSTRACTCurrently, various fruit seedlings are produced in the protected cultivation with the use of appropriate substrates coupled the fertilization. No need of looking for easy acquisition substrate that provides good quality seedlings. Thus, the objective of this work was to evaluate commercial substrate and doses of nitrogen on the development of seedlings of passion of high stature in protected conditions. The treatments consisted of three commercial substrates (Bioplant ® , Coconut Fiber and Vivato ® ) and four doses of nitrogen (0; 150; 300 and 600 mg dm -³ N). After 120 days, evaluated plant height, number of leaves, dry matter weight of shoot (MSPA), root (MSR) and total (MST) and the chlorophyll content (SPAD). In plant height of plants, the Coconut Fiber, differed significantly from other substrates. The maximum height of 122 cm was obtained at a dose of 506 mg dm-³ N. The number of leaves the Coconut Fiber has provided the best response with an average of 20 leaves, being superior to the substrate Bioplant ® and Vivatto ® . On MSPA Coconut Fiber and Bioplant ® were superior in relationship the Vivatto ® , and evaluation of MST has been observed maximum accumulation of 19 g of dry matter of seedlings at a dose of 600 mg dm -³ N in plants development with Bioplant ® substrate. On chlorophyll content feature the best results were obtained in the Bioplant ® substrate with average of SPAD values of 40, but there was no gap to on Cocon...
A indústria sementeira nacional está em franca expansão, atendendo demandas de exportação e importação. Devido ao aumento das exigências por qualidade, as indústrias desenvolveram tratamentos de revestimento, a fim de agregar valor às sementes. O objetivo desta pesquisa foi avaliar sementes disponíveis comercialmente de Urochloa brizantha cv Xaraés e Urochloa ruziziensis cv Kennedy (Ruziziensis) revestidas e não revestidas quanto à sua capacidade de embebição. O experimento foi conduzido no Laboratório de Análises de Sementes da Universidade do Oeste Paulista (UNOESTE). Foram utilizadas sementes originárias de mesmo lote para ambos os cultivares. Para determinação da curva de embebição foram realizadas três repetições de 100 sementes por tratamento (presença e ausência de revestimento) e por período de embebição (0,
The aim of this work was to evaluate commercially available substrates and levels of potassium on the development of passion fruit seedlings in protected conditions. The experiment was conducted at the city of Presidente Prudente, São Paulo within the period from April to September of 2010. The treatments were made with three different substrates (Bioplant ® , Coconut fiber and Vivatto ® ) and four levels of potassium (0, 150, 300 and 600 mg -1 of K dm -³), arranged in a 3 × 4 factorial design with five repetitions. The following parameters were analyzed 120 days after seedlings transplanting: Plant height, number of leaves, length of root, dry matter of shoot, root, total matter and chlorophyll content. The dose of 600 mg dm -3 of K provided the highest seedling height, 85.83 cm independent of the substrate. The commercial substrates Bioplant ® and Coconut fiber with a dose of 150 mg dm -3 of K influenced the maximum accumulation of total dry matter of seedlings. However, Vivatto ® substrate provided the highest accumulation of total dry matter with application dose of 600 mg dm -3 of K. Mineral potassium fertilization in the substrate Bioplant ® and Coconut fiber with a dose of 150 mg dm -3 reduced the length of passion fruit's roots.
The objective of this work was to evaluate the effect of different forms of reimplantation of pasture with and without phosphatation aiming to contribute to the increase of soybean yield. The experiment was conducted at the Experimental Farm of Universidade do Oeste Paulista (Unoeste), located in the municipality of Presidente Bernardes-SP. The design was done with split plot scheme, containing four replicates. The plots were constituted with 4 kg ha-1 of Urochloa brizantha (Marandu grass), BNS + Seeding in haul, BNS + Seeding in line consortium with soybean as subplots (with and without phosphatation). The following were analyzed: number of tillers and dry mass yield (PMS); analysis of plant tissue from pasture; foliar diagnosis analysis; and components of production and production of soy. Analyzed variables were submitted to analysis of variance (p <0.05) and means were compared by the Tukey test (p <0.05). In this context, it can be concluded that a higher quality production with a reimplantation of pasture intercropped with a soybean crop yielding an increase of 276 kg ha-1 compared to the treatment that did not have pasture reimplantation (BNS). Phosphate increased soil phosphorus content in the production of soybean dry matter and no leaf phosphorus content and higher soybean yield.
A matéria orgânica no solo é um reservatório de fósforo de ótima qualidade para o crescimento das plantas. O objetivo desse trabalho foi avaliar a dinâmica e disponibilidade de fósforo orgânico em solos arenosos manejado em sistema de plantio direto, e sua interação com a matéria orgânica. O experimento foi conduzido em um Argissolo Vermelho distroférrico, com os seguintes manejos químicos do solo: Testemunha: Adubação de plantio da Soja, C: Calagem, C+G: Calagem e Gessagem, C+G+NPK: Calagem, Gessagem e adubação NPK, C+G+NPK+Micro: Calagem, Gessagem, adubação NPK e micronutrientes, com plantio de soja e Urochloa brizantha cv. Piatã, sob integração lavoura pecuária. A quantificação do fósforo orgânico revelou que as frações orgânicas de P, independente do tratamento, possuem menores teores, mesmo em sistema de plantio direto, devido à rápida decomposição de matéria orgânica em solos arenosos. A matéria orgânica no solo possui teores superiores nas camadas superficiais, formando um gradiente de concentração no solo.
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