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Influence of temperate grass seed rotation systems on weed seed soil bank composition Rev. bras. sementes
Medeiros,Renato Borges; Steiner,Jeffrey J.
Due to changing cropping practices in perennial grass seed crops in western Oregon, USA, alternative rotation systems are being considered to reduce weed infestations. Information is generally lacking regarding the effects of alternative agronomic operations and herbicide inputs on soil weed seed bank composition during this transition. Six crop rotation systems were imposed in 1992 on a field that had historically produced monoculture perennial ryegrass (Lolium perenne L.) seeds. Each system plot was 20 x 30 m, arranged in a randomized complete block design, replicated four times. Twenty to thirty soil cores were sampled in June 1997 from each plot. The weed species composition of the cores was determined by successive greenhouse grow-out assays. In...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Buried seeds; Cropping practices; Perennial ryegrass; Seed production; Weed species.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222002000100017
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Patrón de rebrote y comportamiento productivo de la asociación del Pasto Ovillo (Dactylis glomerata L.), Ballico perenne (Lolium perenne L.) y Trébol blanco (Trifolium repens L.) Colegio de Postgraduados
Castro Rivera, Rigoberto.
El objetivo del estudio fue determinar la mejor asociación de dos gramíneas y una leguminosa en rendimiento de forraje, tasa de crecimiento (TC), composición botánica, tasa de recambio de tejido y dinámica de ahijamiento. Se evaluaron cinco tratamientos: 40:30:30% Trébol blanco-Ovillo-Ballico perenne (40:30:30% de TB-O- BP); 40:60% Trébol blanco-Ballico perenne; (40:60% de TB-BP); 40:60% Trébol blanco-Ovillo (40:60% de TB-O); 40:40:20% Trébol blanco-Ovillo-Ballico perenne (40:40:20% de TB-O-BP) y 40:20:40% Trébol blanco-Ovillo-Ballico perenne (40:20:40 de TB-O-BP). Se utilizaron 20 unidades experimentales de 104 m2, mediante un diseño en bloques completos al azar con cuatro repeticiones. Los resultados muestran que la asociación 40:20:40% de...
Palavras-chave: Praderas asociadas; Trébol blanco; Ballico perenne; Ovillo; Producción de forraje; Dinámica de la pradera; Tasa de crecimiento. White clover; Perennial ryegrass; Cocksfoot; Herbage yield; Sward dynamics; Growth rate.
Ano: 2012 URL: http://hdl.handle.net/10521/853
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Patrón de rebrote y comportamiento productivo de la asociación del Pasto Ovillo (Dactylis glomerata L.), Ballico perenne (Lolium perenne L.) y Trébol blanco (Trifolium repens L.) Colegio de Postgraduados
Castro Rivera, Rigoberto.
El objetivo del estudio fue determinar la mejor asociación de dos gramíneas y una leguminosa en rendimiento de forraje, tasa de crecimiento (TC), composición botánica, tasa de recambio de tejido y dinámica de ahijamiento. Se evaluaron cinco tratamientos: 40:30:30% Trébol blanco-Ovillo-Ballico perenne (40:30:30% de TB-O- BP); 40:60% Trébol blanco-Ballico perenne; (40:60% de TB-BP); 40:60% Trébol blanco-Ovillo (40:60% de TB-O); 40:40:20% Trébol blanco-Ovillo-Ballico perenne (40:40:20% de TB-O-BP) y 40:20:40% Trébol blanco-Ovillo-Ballico perenne (40:20:40 de TB-O-BP). Se utilizaron 20 unidades experimentales de 104 m2, mediante un diseño en bloques completos al azar con cuatro repeticiones. Los resultados muestran que la asociación 40:20:40% de...
Tipo: Tesis Palavras-chave: Praderas asociadas; Trébol blanco; Ballico perenne; Ovillo; Producción de forraje; Dinámica de la pradera; Tasa de crecimiento.; Doctorado; Ganadería; White clover; Perennial ryegrass; Cocksfoot; Herbage yield; Sward dynamics; Growth rate.
Ano: 2009 URL: http://hdl.handle.net/10521/1224
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Patrón de rebrote y comportamiento productivo de la asociación del Pasto Ovillo (Dactylis glomerata L.), Ballico perenne (Lolium perenne L.) y Trébol blanco (Trifolium repens L.) Colegio de Postgraduados
Castro Rivera, Rigoberto.
El objetivo del estudio fue determinar la mejor asociación de dos gramíneas y una leguminosa en rendimiento de forraje, tasa de crecimiento (TC), composición botánica, tasa de recambio de tejido y dinámica de ahijamiento. Se evaluaron cinco tratamientos: 40:30:30% Trébol blanco-Ovillo-Ballico perenne (40:30:30% de TB-O- BP); 40:60% Trébol blanco-Ballico perenne; (40:60% de TB-BP); 40:60% Trébol blanco-Ovillo (40:60% de TB-O); 40:40:20% Trébol blanco-Ovillo-Ballico perenne (40:40:20% de TB-O-BP) y 40:20:40% Trébol blanco-Ovillo-Ballico perenne (40:20:40 de TB-O-BP). Se utilizaron 20 unidades experimentales de 104 m2, mediante un diseño en bloques completos al azar con cuatro repeticiones. Los resultados muestran que la asociación 40:20:40% de...
Palavras-chave: Praderas asociadas; Trébol blanco; Ballico perenne; Ovillo; Producción de forraje; Dinámica de la pradera; Tasa de crecimiento. White clover; Perennial ryegrass; Cocksfoot; Herbage yield; Sward dynamics; Growth rate.
Ano: 2012 URL: http://hdl.handle.net/10521/841
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Tensile and shearing properties of leaves in festulolium and perennial ryegrass OAK
Hongo, Akio; Enkhee, Devee; 本江, 昭夫; エンヒェー, デヴィ.
The study was carried out to determine tensile and shearing properties of leaves in cultivars (Ba11356 and Ba11358) of festulolium (Festulolium loliaceum), compared with those of diploid (Ba11353 and Aurora) and tetraploid (Ba10855 and Prospero) cultivars of perennial ryegrass (Lolium perenne). Four successive samples of grass leaves were taken from pure stands of third-year swards during July to September, 2004 in Obihiro, Japan. Tensile strength was measured using a 100 N load cell of the breaking test machine. Shear strength was measured about 5 mm apart from a broken point in the tensile test using a pair of the scissors. Cross-sectional area, DM weight and width of leaves were significantly higher in tetraploid perennial and festulolium than in...
Palavras-chave: Festulolium; Grass leaves; Perennial ryegrass; Shearing; Tensile.
Ano: 2006 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/91
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The Water Deficit of Evapotranspiration Covers on Potash Tailing Piles Using CropWat CIGR Journal
Bilibio, Carolina; Hensel, Oliver.
Evapotranspiration covers are key to minimizing water percolation in waste systems. On potash tailings piles, evapotranspiration covers are important because they may decrease the leaching of brines generated from precipitation erosion. Considering this, the water deficit of four different potash tailings piles covering materials were evaluated using the CropWat model. This study was based on a lysimeter experiment carried out in Heringen, Germany. The experiment consisted of 4 different technogenic substrates made of municipal incineration wastes and coal combustion residues covered with a mixture of perennial grasses. By using the FAO CropWat model, the effective precipitation, crop evapotranspiration, actual evapotranspiration and the water deficit were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Effective precipitation; Drought; Perennial ryegrass; Lysimeters; Crop coefficient.
Ano: 2021 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6327
Registros recuperados: 6
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