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| Registros recuperados: 21 | |
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| VARGAS,L.A.; PASSOS,A.M.A.; KARAM,D.. |
| ABSTRACT: Searching for alternatives to deal with weeds without the exclusive use of herbicides can increase the sustainability of agricultural production in the Amazon region. This study aimed to evaluate the allelopathic potential of cover crops on the weed shrubby false buttonweed (Spermacoce verticillata L.). Three straw levels (1; 2.5 and 5 mg cm-2) of thirteen cover crops (Cajanus cajan, Canavalia ensiformis, Crotalaria juncea, C. ochroleuca, C. spectabilis, Mucuna aterrima, M. cinereum, Pennisetum glaucum, Sorghum bicolor, S. sudanense, Urochloa brizanha cv. Xaraés, U. brizantha cv. Piatã and U. ruziziensis) were assessed on germination and initial growth of weed and lettuce. We carried out two experiments (weed and lettuce) in a factorial scheme... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Crop control; Leguminous; Sandwich method; Straw. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100253 |
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| Nascente,A.S.; Guimarães,C.M.; Cobucci,T.; Crusciol,C.A.C.. |
| The correct management of cover crops in no-tillage aims to obtain greater benefits with its introduction in agricultural systems. The use of forage species such as Brachiaria, due to the large amount of biomass and for persisting longer on the ground, has become a good option. In this sense, an important point is the time interval between the cover desiccation with glyphosate and planting of rice in order to obtain higher operating income in the sowing, greater availability of nutrients, greater presence of straw on the soil surface, and lower release of possible allelopathic substances. The objective of this study was to assess the effect of the management of B. ruziziensis, with or without herbicide, preceding the crop planting, in the yield components... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Straw; Cover crops; No tillage system; Glyphosate. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000400006 |
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| TROPALDI,L.; BRITO,I.P.F.S.; DIAS,R.C.; TRINDADE,M.L.B.; CARBONARI,C.A.; VELINI,E.D.. |
| ABSTRACT: Maintenance of straw on the soil surface in sugarcane production areas can influence weed occurrence and herbicide dynamics. After application, considerable losses of clomazone can occur as a result of its physicochemical characteristics. For this reason, novel formulations have been developed. In addition to the conventional formulation, microencapsulated formulations are currently available. Thus, the aim of this study was to observe and compare the effect of clomazone formulations under different application conditions. For this purpose, the experiment was carried with 12 treatments in a completely randomized design, with four replications, using clomazone formulations (1,200 g a.i. ha-1), on soils with different moisture levels, in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Straw; Herbicide; Volatilization; Ipomoea nil (L.) Roth; Urochloa decumbens (Stapf.) R.D.Webster; Panicum maximum Jacq. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100274 |
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| Tonieto,T.A.P.; Regitano,J.B.. |
| Green sugarcane harvesting may promote great changes in the dynamics of herbicides in the environment. Our goal was to evaluate the influence of straw decomposition degree on leaching and weed (Ipomoea grandifolia) control efficacy by (14C) tebuthiuron and hexazinone. The presence of straw on the soil surface affected leaching, mainly for hexazinone (leaching reduced from 37 to 5% of the applied amount in the presence of straw). Overall, tebuthiuron showed more efficient control of Ipomoea than hexazinone. The straw decomposition degree affected only hexazinone efficacy that was lowest for the least decomposed straw. Further studies are needed to evaluate the effects of sugarcane straw on herbicides dissipation, particularly on volatilization and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tebuthiuron; Hexazinone; Straw; Decomposition; Sugarcane; Ipomoea spp. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400016 |
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| Mirnezami, Seyed Vahid; Chegini, Gholamreza. |
| Residual straw status on the field after harvesting was one of the important obstacles in using stripper header in Iran. In this work, combine performance studied with two type headers, conventional and stripper in wheat farm. Residual stems after harvesting collected, baled, and two methods were compared. The results showed that fuel consumption in the stripper header was 5.68 L/ha less than the conventional header. Combines with stripper header harvested 1500 m2 more than the conventional header in each hour. Stripper header in comparison with the conventional had 21% harvesting efficiency and 840 kg/h field performance which harvested more wheat. Harvesting time and fuel consumption for straw harvesting operation in the harvested field with stripper... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Straw; Stripper header; Combine performance. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3206 |
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| Cervi,Walter R.; Lamparelli,Rubens; Berni,Mauro; Rocha,Jansle. |
| ABSTRACT The present study aims to present the main concepts of the sugarcane straw to energy planning. Throughout the study, the subject is contextualized highlighting broader aspects of sustainability, which is considered the main driver towards agro-energy modernization. Concerning sugarcane straw, we first evaluated its availability regarding technical and economic aspects, and then it summarized the straw production chain for energy supply purposes. As a proposal to support agro-energy planning, it is presented some spatial tools that have been barely used in the Brazilian energy planning context so far. Therefore, working on straw to electricity associated with supply chain basis, we developed a conceptual model to spatially assess this bioenergy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sugarcane; Straw; Agro-energy planning; Geographic information system. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000601210 |
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| Favarato,L.F.; Galvão,J.C.C.; Souza,J.L.; Guarçoni,R.C.; Souza,C.M.; Cunha,D.N.. |
| Currently, one of the biggest challenges faced by organic no-tillage farming is weed control. Thus, the use of cropping practices that help in the control of weeds is extremely important. The objective of this study was to evaluate population density and level of weed infestation in an organic no-tillage corn cropping system under different soil covers. The experiment was conducted in a randomized block design with six repetitions and five treatments, consisting of three soil covers in an organic no-tillage system, and an organic and a conventional system, both without soil cover. The treatments with soil cover used a grass species represented by the black oat, a leguminous species represented by the white lupine, and intercropping between both species.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Lupinus albus; Straw; Organic farming. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400008 |
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| Landell,Marcos Guimarães de Andrade; Scarpari,Maximiliano Salles; Xavier,Mauro Alexandre; Anjos,Ivan Antônio dos; Baptista,Antônio Sampaio; Aguiar,Cláudio Lima de; Silva,Daniel Nunes da; Bidóia,Márcio Aurélio Pitta; Brancalião,Sandro Roberto; Bressiani,José Antônio; Campos,Marcelo Ferraz de; Miguel,Paulo Eduardo Martins; Silva,Thiago Nogueira da; Silva,Victor Hugo Pavelqueires da; Anjos,Luciana Oliveira Souza; Ogata,Bruna Harumi. |
| Sugarcane (Saccharum spp.) is an efficient and sustainable alternative for energy generation compared to non-renewable sources. Currently, during the mechanized harvest process, the straw left in the field can be used in part for the second generation ethanol and increasing the electric energy production. Thus, this study aimed to provide information on the potential for residual biomass cultivars of sugarcane cropping system. This study provides the following information: yield of straw, depending on the calculated leaf area index and the number of tillers per linear meter; primary energy production of several sugarcane genotypes; contribution of dry tops and leaves; biomass yield; and evaluation of fiber, cellulose, hemicellulose and lignin. Preliminary... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Straw; Genotypes; Composition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500003 |
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| Candeias,Marcela Leite; Alvarenga,Marco Antonio; Carmo,Márcio Teoro do; Ferreira,Heder Nunes; Maior,Mônica Russo Souto; Torres Filho,Rodolpho de Almeida; Rodrigues,André Luís Rios; Brandão,Felipe Zandonadi. |
| The effect of the utilization of three semen protocols (Inra 82®, Merck Gema and Botu-crio®) and two filling techniques (0.25 and 0.50 mL straws) in Mangalarga Marchador stallions were studied in this experiment. Sperm parameters were assessed during processing and post-freezing. No interactions between the protocols and type of filling were observed, so they were assessed separately. Sperm parameters were not altered when the extender was added to the centrifugation; however, there was reduction of motility and strength when freezing extenders were added. The Botu-crio® protocol preserved the parameters of total and progressive sperm motility, smoothed path velocity (µm/s), straight line velocity (µm/s), track velocity (µm/s) and the average and fast... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ejaculated; Equine; Extender; Straw. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900004 |
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| Ferreira,Gilberto Alves; Oliveira,Paulo Sérgio Rabello de; Alves,Sérgio José; Costa,Antonio Carlos Torres da. |
| ABSTRACTThe aim was to evaluate the effects of grazing height of Brachiaria ruziziensis on the production of straw, and the establishment and grain yield of a soybean crop, under an integrated crop-livestock system, on a typic dystrophic Red Latosol at the Experimental Farm of the Agronomic Institute of Paraná (IAPAR), in Xambrê, in the state of Paraná, Brazil (PR). The study was carried out between September of 2010 and April of 2012. The experimental design was of randomised blocks, in lots split over time, with five treatments and three replications. The following were determined for the Brachiaria ruziziensis: shoot dry matter weight, plant residue dry matter weight, and total dry matter weight (Brachiaria ruziziensis shoot weight + plant residue... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Establishment; Straw; No tillage; C/N ratio. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000400755 |
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| Tavares,Rose Luiza Moraes; Souza,Zigomar Menezes de; Scala Jr,Newton La; Castioni,Guilherme Adalberto Ferreira; Souza,Gustavo Soares de; Torres,José Luiz Rodrigues. |
| ABSTRACT The sugarcane green harvest system, characterized by mechanized harvesting and the absence of crop burning, affects soil quality by increasing crop residue on the soil surface after harvest; thus, it contributes to improving the physical, chemical, and microbiological properties and influences the soil carbon content and CO2 flux (FCO2). This study aimed to evaluate the spatial and temporal variability of soil FCO2 in sugarcane green harvest systems. The experiment was conducted in two areas of sugarcane in São Paulo, Brazil: the first had a 5-year history of sugarcane green harvest (SG-5) and the second had a longer history of 10 years (SG-10). The temporal FCO2 were evaluated in the dry and rainy periods, and spatial variability in the dry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CO2 emission; Soil respiration; Straw; Mechanized harvest; Physical properties. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100524 |
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| Yang, Li-sha. |
| On the basis of expounding the status quo and using developmental trend of China’s straw, 4 indices are selected: straw yield, planting area, using amount of fertilizer and effective irrigation area. According to the relevant data of China Statistical Yearbook from 1991 to 2008, by using linear regression model, we calculate China’s rural straw yield, analyze the factors impacting straw yield, and point out that the using amount of fertilizer is the important factor impacting straw yield. Based on these, in the perspective of low-carbon agricultural economy, we put forward suggestions of using straw comprehensively from 4 perspectives in order to provide theoretical reference for decision-makers: improve fertilizer dependence; develop straw reuse... |
| Tipo: Journal Article |
Palavras-chave: Village; Straw; Low-carbon agriculture; Measuring; China; Agribusiness. |
| Ano: 2011 |
URL: http://purl.umn.edu/108472 |
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| Castagnara,Deise Dalazen; Neres,Marcela Abbado; Oliveira,Paulo Sérgio Rabello de; Meinerz,Cristiane Claudia; Mesquita,Eduardo Eustáquio. |
| The study was conducted to estimate the dehydration curves, chemical composition, and occurrence of fungi in white oat hay (Avena sativa L. cv. Guapa BRS) and black oat hay (Avena strigosa Schreb cv. Common) at two cutting heights. Dehydration curves were studied under a randomized block design with a 2 × 2 factorial arrangement using split plots in time, considering two types of oats (white and black), two cutting heights (10 and 20 cm), and 17 sampling times (0, 4, 19, 24, 28, 43, 47, 52, 67, 71, 76, 91, 95, 100, 115, 129, and 124 hours after harvesting) with five replicates. For the chemical composition and occurrence of fungi, the experimental design comprised randomized blocks in a factorial 2 × 2 split-plot in time with two types of oats, two cutting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena spp; Crude protein; Dehydration curves; Storage fungi; Straw. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500002 |
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| Registros recuperados: 21 | |
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