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| Martins, Carlos Eduardo Nogueira; Universidade Federal de Santa Maria; Quadros, Fernando Luiz Ferreira de; Universidade Federal de Santa Maria; Araldi, Danieli Furian; Universidade de Cruz Alta; Moojen, Eduardo Londero; Universidade de Cruz ALta; Bandinelli, Duilio Guerra; Instituto Federal Farroupilha; Garagorry, Fábio Cervo; Universidade de Cruz Alta. |
| Objetivou-se avaliar os possíveis efeitos do uso do herbicida e da introdução de espécies de estação fria na dinâmica vegetacional da pastagem natural. Os tratamentos foram: pastagem natural com roçadas anuais (CN); pastagem natural melhorada com introdução de espécies de estação fria e com adubação anual (CNI); idem ao anterior, mas com uma aplicação de glifosato (G1); idem ao anterior, porém com três aplicações de glifosato (G3); idem ao G3, mas com o dobro da adubação anual (GA3). A semeadura de trevo branco, cornichão e azevém anual foi feita a lanço, sendo esta precedida da aplicação do herbicida glifosato. O sistema de pastejo foi o contínuo com lotação variável. A composição botânica observada foi diferente (p < 0,06) entre os tratamentos que não... |
| Tipo: Pesquisa de campo |
Palavras-chave: 5.04.04.02-4 azevém anual; Cornichão; Glifosato; Trevo branco Manejo e Conservação de Pastagens annual ryegrass; Birdsfoot trefoil; Glyphosate; White clover. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/9148 |
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| Skonieski, Fernando Reimann; Universidade Federal de Santa Maria (UFSM); Viégas, Julio; Universidade Federal de Santa Maria (UFSM); Cruz, Pablo; Institut National de la Recherche Agronomique (INRA); Nornberg, José Laerte; Universidade Federal de Santa Maria (UFSM); Bermudes, Rogério Fôlha; Universidade Federal de Santa Maria (UFSM); Gabbi, Alexandre Mossate; Universidade Federal do Rio Grande do Sul (UFRGS). |
| The dynamics of nitrogen (N) in ryegrass intercropped with different forage species with regard to dry matter (DM) accumulation within an agroecological transition system was evaluated. Annual ryegrass was intercropped with black oats (RY + BO), white clover (RY + WC) and forage peanut (RY + FP). The experimental design was completely randomized, with three replications. The study applied the N dilution model for plant tissue which comparatively uses modifiable factors of the environment at optimal levels. The model shows decline in N concentration due to the DM accumulation of temperate grass pastures. Data were compared to model by the root mean square deviation analysis. Dilution coefficient (β), used in all pasture samples, was lower than -0.60.... |
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Palavras-chave: Dilution coefficient; Forage peanut; Legumes; Nutrients; Oat; White clover. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12661 |
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| ULGUIM,A.R.; CARLOS,F.S.; ZANON,A.J.; OGOSHI,C.; BEXAIRA,K.P.; SILVA,P.R.F.. |
| ABSTRACT: Imazapyr+imazapic ready mix is the main herbicide used to weed control in Clearfield® Rice System. The continuous use of high doses may increase their residual activity in the soil. The aim of this research was determine the sensitivity of cover crops and soybean in rotation with flooded rice to different levels of imazapyr+imazapic residues in the soil and its effect on soil microbiology. A field experiment was performed during the 2014/15 and 2015/16 seasons. In the first crop season, flooded rice was cultivated using herbicide rates in order to have levels of residue in the soil: 0, 140 (label dosage, equivalent to 73.5+24.5 g a.i. ha-1), 280, 560, 840 and 1,120 g ha-1. After crop harvest, during fall-winter, it was sown ryegrass, white clover... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil residue; Ryegrass; White clover; Soybean. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100152 |
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| Khanlou,Khosro Mehdi; Vandepitte,Katrien; Asl,Leila Kheibarshekan; Bockstaele,Erik Van. |
| Cost reduction in plant breeding and conservation programs depends largely on correctly defining the minimal sample size required for the trustworthy assessment of intra- and inter-cultivar genetic variation. White clover, an important pasture legume, was chosen for studying this aspect. In clonal plants, such as the aforementioned, an appropriate sampling scheme eliminates the redundant analysis of identical genotypes. The aim was to define an optimal sampling strategy, i.e., the minimum sample size and appropriate sampling scheme for white clover cultivars, by using AFLP data (283 loci) from three popular types. A grid-based sampling scheme, with an interplant distance of at least 40 cm, was sufficient to avoid any excess in replicates. Simulations... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sampling strategy; White clover; AFLP; Genetic diversity parameters. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200015 |
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