Rosa D.M.,West Parana State University |
Nobrega L.H.P.,West Parana State University |
Mauli M.M.,West Parana State University |
De Lima G.P.,West Parana State University |
Tropical and Subtropical Agroecosystems | Year: 2013
This trial aimed at testing the leguminous Mucuna deeringiana, Cajanus cajan and Stylosanthes capitata e macrocephala before corn development and weeds incidence. The leguminous species were sown in October 2007 with a control treatment without legumes (fallow) in 4 × 5 m plots with five replications each, totaling 20 plots. At 90 days, plants were grazed and maize, 15 days after grazing, was planted on the wastes. The seedling emergence and plants growth were evaluated, besides the weeds incidence during culture development. At last, the experimental design was completely randomized and the means were compared by Scott-Knott at test 5 % of significance. The studied cover plants showed an efficient control over weeds and did not interfere in a negative way on the maize crop. Thus, it is an alternative to the integrated management of species concerning the green manure and crop rotation in no-tillage system for the Western region of Paraná.
Chavarria G.,University Of Passo Fundo |
Durigon M.R.,FAMV |
Klei V.A.,University Of Passo Fundo |
Kleber H.,University Of Passo Fundo
Ciencia Rural | Year: 2015
The aim of the research was to characterize the primary metabolism, with emphasis on photosynthetic activity, of soybean plants under different water availability conditions. The experiment was conducted in growth chamber with young plants of soybean cv. 'BMX Apolo RR' cultivated without water restriction up to the stage of six leaves expanded and the seventh leaf unfolded. Five levels of water availability were studied (-0.004,-0.006,-0.026,-0.042 and-0.164MPa) with eight pots (replications) per treatment. It was evaluated the net carbon assimilation (AL), stomatal conductance (gs) and transpiration (E) of the sixth leaf of one plant per pot. It was determined the water potential leaf, chlorophyll fluorescence, chlorophyll content (a, b and total), quantum yield and it was characterized the vegetative growth. Soil water potential of-0.026 MPa compromises the net carbon assimilation of soybean plants due to reduction of the stomatal resistance. The potentials applied did not influence in the amount of photosynthetic pigments andin the vegetative growth in situations of short exposition to stress. © 2015 Universidade Federal de Santa Maria. All rights reserved.
Quality of ground water taken from sources in function of the presence of physical protection and the position in the landscape [Qualidade de águas subterrâneas captadas em fontes em função da presença de proteção física e de sua posição na paisagem]
Rheinheimer D.D.S.,Brazilian National Council for Scientific and Technological Development |
Goncalves C.S.,IFET |
Bortoluzzi E.C.,Brazilian National Council for Scientific and Technological Development |
Pellegrini J.B.R.,Spanish University for Distance Education (UNED) |
And 2 more authors.
Engenharia Agricola | Year: 2010
In rural areas, water for human consumption is often captured by insecure systems. The objective of this work was monitoring some parameters of the quality of groundwater taken from sources, pointing out their position in the landscape and the presence of physical protection. For this , 36 sources in the watershed of Arroio Lino, a rural area of Agudo, RS, Brazil, were sampled and classified according their physical protection and position in the landscape. A monitoring program, from January to August 2002, was carried out to analyze the following parameters: pH, color, total soluble organic carbon - TSOC, N-NO 3, N-NH 3 and total phosphorus, E. coli and total coliforms. The parameters values changed with the time of collection and were often above the Maximum Allowable values provided by the Brazilian Ministry of Health. A rudimentary protection was efficient to the PT of the sources located in high levels; however it has present discrepant results for the low part of the landscape, considering the parameters TSOC e N-NO 3. The collective drained source, system recommended by the official technical assistance, was the most efficient to avoid contamination by Escherichia coli, restricting also the levels of total coliforms, total phosphorus and N-NO 3 as compared to the individual sources. The sources position in the landscape and the presence of a rudimentary physical protection can be employed as a partial criterion to accept that a water source be used for collecting water.
de Ataide M.W.,Federal University of Rio Grande do Sul |
Brun M.V.,University Of Passo Fundo |
Barcellos L.J.G.,FAMV |
Bortoluzzi M.,Medica Veterinaria Autonoma |
And 9 more authors.
Ciencia Rural | Year: 2010
In this study the authors compared two different procedures of ovariosalpingohysterectomy (OSH) in dogs. For that, 18 dogs were randomly assigned into 2 different groups: group I (GI) in which the OSH was performed by celiotomy and group II (GII) in which it was a video-assisted procedure using two portals positioned in the umbilical and pre pubic regions, under dorsal recumbence position. In both groups the method of hemostasis was the Ligasure Atlas®. The authors did not observe significant differences between both methods for the surgical time or complications during and after the surgical procedure and blood loss. It was concluded that OSH using video-assisted surgery with two portals and the conventional technique, both using Ligasure Atlas® are safe, fast and effective to be used in dogs.