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| Silva, Edmilson Evangelista da; Azevedo, Pedro Henrique Sabadin; Almeida, Maxwell Merçon Tezolin Barros; De-Polli, Helvécio; Guerra, José Guilherme Marinho. |
| The objective of this work was to evaluate the influence of the intercropping and irrigation frequencies in the leaf development and productivity of taro (Colocasia esculenta) under organic management. The experiment was set up as a randomized complete block design, a factorial 2 x 2, with four replications. Taro was cultivated in monoculture or intercropped with Crotalaria juncea under two irrigation frequencies: every 3.5 days for 30 minutes and every 15 days for 2 hours. The intercropping increased taro petiole length but did not increase leaf area. The same effects were observed for irrigation frequency on the leaf area and petiole, length at the 30th and 60th days after C. juncea cutting. The amount of taro yield and offshoot number of class 1... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Farm nutrient management; Irrigation and drainage. |
| Ano: 2008 |
URL: http://orgprints.org/12595/1/Silva_12595_ed.doc |
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| Pimentel, Márcio Sampaio; Togun, Adeniyi Olumuyiwa; Guerra, José Guilherme Marinho; De-Polli, Helvécio. |
| This research was conducted to study the direct fertilization combining 0 and 160 kg N ha-1 of cattle manure and green manure as branches of pigeon pea (Cajanus cajan L.) and their residual effects on two population densities of roquette (Eruca sativa Miller) crop, in Seropédica, Rio de Janeiro, Brazil. Yield, number of leaves plant-1, leaf area index, shoot fresh weight, stems dry matter, roots dry matter, leaves dry matter, total dry matter and plant height were measured. The experiment was a randomized block design set as a factorial 2 x 2 x 2, and three replications: 0 and 160 kg N ha-1 of cattle manure, 0 and 160 kg N ha-1 of branches of pigeon pea and 500,000 and 1,000,000 plants ha-1. The results indicate that the population density of 500,000... |
| Tipo: Journal paper |
Palavras-chave: Production systems; Beef cattle; Social aspects. |
| Ano: 2010 |
URL: http://orgprints.org/24535/1/Pimentel_Performance.pdf |
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| Zago, Valéria Cristina Palmeira; De-Polli, Helvécio; Rumjanek, Norma Gouvêa. |
| Avaliou-se a diversidade de populações de Pseudomonas spp. fluorescentes associadas à alface, cenoura e pepino, cultivados em sistema orgânico. O delineamento experimental foi de blocos inteiramente casualizados, com três repetições. Foi incorporado ao solo anterior ao plantio, 20 t/ha de esterco bovino curtido e 1,5 t/ha de termofosfato. As amostras de solo foram separadas em ectorizosfera, rizoplano, endorizosfera e filoplano por olerícola. Os isolados bacterianos que apresentaram fluorescência sob luz UV foram selecionados e caracterizados conforme a morfologia de suas colônias, sendo que um isolado, de cada um dos grupos mais representativos quantitativamente, foi identificado pelo Sistema API 20NE. Foram selecionados 25 isolados, identificados como P.... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems; Vegetables; History of organics. |
| Ano: 2011 |
URL: http://orgprints.org/23083/1/Zago_Pseudomonas.pdf |
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| Pimentel, Márcio Sampaio; Oliveira, Nelson Geraldo de; De-Polli, Helvécio. |
| In an intercropping lettuce-carrot system submitted to crescent dosages of organic compost (0; 12; 24; 48 Mg ha-1) were monitored carbon from soil microbial biomass (MBC), labile carbon in fumigated soil (LCF), in non-fumigated soil (LCNF), in autoclaved soil (LCA) and total organic carbon (TOC) at 0-10 cm of depth. Pasture and forest areas surrounding the experiment were used as reference. Five samples from soil were evaluated at 8 days before the beginning of the experiment, 0; 6; 60 and 114 days after manuring (dam). LCF was the attribute that presented the most consistent correlation with TOC that is usually utilized to detect changes in soil organic matter. Increasing dosages of organic compost caused the increase of MBC, LCF, LCNF, LCA and TOC. From... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems; Soil. |
| Ano: 2013 |
URL: http://orgprints.org/24483/1/PIMENTEL%2C%20M%C3%A1rcio%20Sampaio_Total%20and%20labile%20organic%20carbon%20content%20in%20agroecological%20system.pdf |
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