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A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae) Neotropical Ichthyology
López-Rodríguez,Nathalia C.; Barros,Cíntia M. de; Petry,Ana Cristina.
ABSTRACT This study proposes eight stages according to the main discernible changes recorded throughout the embryonic development of Jenynsia multidentata. The development of morphological embryo structures, pigmentation, and changes in tissues connecting mother and embryo were included in the stage characterization. From the fertilized egg (Stage 1), an embryo reaches the intermediary stages when presenting yolk syncytial layer (Stage 2), initial pigmentation of the outer layers of the retina and dorsal region of the head (Stage 3), and the sprouting of the caudal (Stage 4), dorsal and anal fins (Stage 5). During the later stages, the ovarian folds enter the gills, and the body pigmentation becomes more intense (Stage 6), the body becomes elongated (Stage...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Developmental stages; Dry weight; Matrotrophy; Morphology; Viviparity.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400206
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Agronomic studies of corn and sorghum during 1977 Thai Agricultural
Supot Faungfupong; Wasana Wongyai; Kittima Montranon; Surapol Chowchong.
12 tables
Palavras-chave: Corn; Maize; Sorghum; Growth; Nitrate reductase; Agronomic characters; Dry weight; Nitrogen fertilizers; Weed control; Yields; ข้าวโพด; ข้าวฟ่าง; การเจริญเติบโต; การแข่งขันกับวัชพืช.
Ano: 1977 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3921
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Desiccation and recovery of periphyton biomass and density in a subtropical lentic ecosystem - doi: 10.4025/actascibiolsci.v35i3.14022 Biological Sciences
Algarte, Vanessa Majewski; Universidade Estadual de Maringá; Siqueira, Natália Silveira; Universidade Estadual de Maringá; Rodrigues, Liliana; Universidade Estadual de Maringá.
This study assessed the desiccation effects on biomass and algal density of periphyton in a subtropical lentic ecosystem. This experiment was conducted with only one in situ experimental desiccation event for 15 hours in a mature periphytic community. The periphyton after desiccation was distinct in density and biomass estimators (dry weight and chlorophyll a) when compared to the control periphyton. After the tenth day of desiccation, the community presented similar values for biomass estimators when compared to the control periphyton. The density and biomass estimators of the periphyton community was affected by the desiccation event and required about ten days to recover to pre-disturbance conditions.  
Tipo: Estudo ecológico Palavras-chave: Ecologia 2.05.00.00-9 chlorophyll a; Disturbance; Dry weight; Resilience; Floodplain ecologia.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/14022
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Eichhornia azurea decomposition and the bacterial dynamic: an experimental research BJM
Dahroug,Zaryf; Santana,Natália Fernanda; Pagioro,Thomaz Aurélio.
Abstract Organic decomposition is a complex interaction between chemical, physical and biological processes, where the variety of aquatic vascular plants is essential for the trophic dynamics of freshwater ecosystems. The goal of this study was to determine the aquatic macrophyte Eichhornia azurea (Sw.) Kunth decomposition rate, the time relation with the limnological parameters, and whether this relationship is a result of decomposition processes. To that end, we collected water and leaves of E. azurea in Surf Leopoldo, PR. The experiment consisted of two treatments: 25 containers with 450 mL of water and 0.8 g of biomass dry weight were used with or without the addition of macrophytes. Samples were collected in triplicate at times 0, 3 h, 6 h, 12 h, 24...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Decomposition rate; Dry weight; Aquatic macrophyte; COD.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000200279
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Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates R. Bras. Zootec.
Costa,Newton de Lucena; Moraes,Anibal de; Monteiro,Alda Lúcia Gomes; Motta,Antonio Carlos Vargas; Oliveira,Ricardo Augusto de; Rodrigues,Antonio Neri Azevedo.
The effect of nitrogen (N) fertilization (0, 50, 100 and 200 kg N ha-1) on forage yield and morphogenesis of Axonopus aureus was evaluated in the savannas of Roraima State, Brazil. The experimental design was in randomized blocks with three replicates. The grass showed high responsiveness to N fertilization. Dry weight (DW) yield, morphogenetic and structural traits and forage quality were positively affected by N fertilization. The effects of N fertilization on DW yield, N content, leaf appearance rate, leaf elongation rate, number of live leaves/tiller, final leaf length and leaf area index were quadratic and maximum values were estimated with application of 168.8 (2,181 kg ha-1); 124.8 (21.1 g/kg); 158.5 (0.163 leaf/day per tiller); 172.3 (2.75...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dry weight; Leaf; Senescence; Tillering.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800002
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Growth, assimilate partition and yield of melon charenthais under different shading screens Horticultura Brasileira
Pereira,FHF; Puiatti,M; Finger,FL; Cecon,PR.
In this experiment we evaluated the growth, partition of assimilates and yield of melons type hybrid Charenthais 'Fleuron' under different shading nets. The experiment was conducted at Federal University of Viçosa, from November 24, 2003 to March 11, 2004. The treatments consisted of four growth environmental conditions, as follows: control (full sun), and under Aluminet® 30%-O, Cromatinet® 30%-O, Sombrite® 30%, with reduction of photosynthetic active radiation (PAR) of 30.85%, 35.9% and 32.0%, respectively. The experiment was arranged in a complete random design with four replicates. For the periodically evaluated characteristics we used a sub divided parcel 4 x 7 with the growing conditions in the parcel and the evaluations on the sub parcel (0, 14, 28,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cucumis melo; Light; Leaf area; Dry weight; Yield.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000100015
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Growth, phenology, and seed viability between glyphosate-resistant and glyphosate-susceptible hary fleabane Bragantia
Kaspary,Tiago Edu; Lamego,Fabiane Pinto; Cutti,Luan; Aguiar,Adalin Cezar de Morais; Rigon,Carlos Alberto Gonsiorkiewicz; Basso,Claudir José.
ABSTRACT Glyphosate is the herbicide most used worldwide. In cropping systems that rely on repeated applications of glyphosate or cultivate genetically modified soyabean crop, there are numerous cases of glyphosate resistant weeds, including Conyza bonariensis. Differences among competitive ability of Conyza spp. have been found. However, little information is available on the fitness costs related to glyphosate resistance in Conyza bonariensis. We evaluated growth, phenology, and seed viability of glyphosate-resistant (GR) and glyphosate-susceptible (GS) Conyza bonariensis from Brazil, in 2012 (fall/winter) and 2013 (spring/summer). When grown alone, in pots, C. bonariensis GR biotype developed more rapidly than the GS biotype, as evidenced by their...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conyza bonariensis; Plant height; Dry weight; Leaf area; Seed set.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000100092
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Intercropping Urochloa brizantha and sorghum inoculated with Azospirillum brasilense for silage Rev. Ciênc. Agron.
Nakao,Allan Hisashi; Andreotti,Marcelo; Soares,Deyvison de Asevedo; Modesto,Viviane Cristina; Dickmann,Lourdes.
ABSTRACT Livestock performance in the Brazilian Cerrado has been limited by the low availability of good quality fodder, especially during periods of low rainfall. The aim of this study was to evaluate growth and dry matter production in two cultivars of sorghum, inoculated or not with diazotrophic bacteria, and as a monocrop or intercropped with palisade grass under a system of crop-livestock integration. The experiments were carried out in the field in the Cerrado region during the autumn-winter period of 2015 and 2016, on the experimental farm of the Faculty of Engineering at Ilha Solteira, UNESP, in Selvíria, in the State of Mato Groso do Sul, Brazil (MS). A randomised complete block experimental design was used in a 2 x 2 x 2 factorial scheme with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diazotrophic bacteria; Dry weight; Sorghum bicolor (L.) Moench; Palisade grass.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300501
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Interference from the vertical variation of soil phosphorus and from water stress on growth in maize, the soybean and sunflower Rev. Ciênc. Agron.
Ros,Clovis Orlando Da; Matsuoka,Marcia; Silva,Rodrigo Ferreira da; Silva,Vanderlei Rodrigues da.
ABSTRACT The distribution of phosphorus (P) in the soil interferes with the availability of the nutrient and can affect plant growth. The aim of this study was to compare the growth and accumulation of P in maize, soybean and sunflower plants in vertical gradients of the nutrient in the soil, with and without water stress. The design was completely randomised with five replications, in a 3 x 2 factorial scheme: three soil depth gradients of P (decreasing, increasing and nil) and two conditions of soil water availability (with and with no water stress). The depth gradients of P were in decreasing doses of P2O5 (300, 200, 100 and 0 mg dm-3), increasing doses (0, 100, 200 and 300 mg dm-3) and equal doses (150 mg dm-3) applied to the intermediate layers...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil water; Roots; Dry weight; Nutrient accumulation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300419
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Physiological studies of corn and sorghum production Thai Agricultural
Pismai Srisukphrasert; Teerasak Manupeerapan; Atcharee Rakla; Nipa Kaewborisutsakul.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Physiology; Growth; Maturity; Spacing; Population densities; Varieties; Downy mildew; Disease resistance; Yields; Dry weight; Quality; ข้าวโพด; ข้าวฟ่าง; ระยะระหว่างแถว; ความหนาแน่นของประชากร; โรคราน้ำค้าง.
Ano: 1981 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4064
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Relaciones peso seco-talla y volumen-talla en Themisto gaudichaudii, principal anfípodo hiperído del Mar Epicontinental Argentino. OceanDocs
Alvarez Colombo, G.L.; Viñas, M.D..
Themisto gaudichaudii, the most abundant and widely distributed hyperiid amphipod in Argentine shelf waters, provides a source of food for several species of economical value such as the anchovy, mackerel, hake, and squid. Predictive dry weight-length and volume-length regression were established in order to provide an indirect estimation of the individual body mass from a measurement of body length. Samples were collected in San Jorge Gulf and fixed with a 4 o/o formaldehyde solution. The possible effect of formaldehyde fixation on dry weight and volume is discussed.
Tipo: Journal Contribution Palavras-chave: Dry weight; Length-weight relationships.
Ano: 1994 URL: http://hdl.handle.net/1834/1928
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Root growth and carbohydrate partitioning in cotton subjected to shading in the initial phase Ciência Rural
Echer,Fábio Rafael; Zanfolin,Priscila Roberta Leme; Moreira,Ana Carolina Monico; Santos,Ana Cláudia Pacheco; Gorni,Pedro Henrique.
ABSTRACT: Cotton cultivation in Brazil tends to occur mostly in the rainy season, and at the time of developing the crop there are often prolonged periods of low solar radiation. The objective of this work was to evaluate the root development of cotton cultivars subjected to shading in the initial phase. The experiment was carried out in a greenhouse, using rhizotrons. The experimental design was a 2x2 factorial in randomized blocks with five replications. The treatments were composed of cotton cultivars TMG 1WS (early) and TMG 8WS (late) and luminosity conditions: non-shaded and shaded (50% reduction of luminosity). There were no interactions between the factors “shading” and “cultivars” for any parameter evaluated. Shading reduced total and lateral root...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Root length; Dry weight; Radiation.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000100200
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Studies of Quantitative Relationships Among Dendrometric Variables and Carbon Contents for Native Mimosa scabrella Stands in the Curitiba Metropolitan Region PFB - Pesquisa Florestal Brasileira
Machado, Sebastião do Amaral; Urbano, Edilson; Jarschel, Barbara; Teo, Saulo Jorge; Figura, Marco Aurélio; Silva, Luis César Rodrigues da.
This research aimed to determine dry weights and carbon contents by age, and by compartment of Mimosa scabrella trees, their correlations with other measured tree variables. The data for this research work came from 190 trees located in several counties of the Curitiba metropolitan region. Total height, crow height, stem height, DBH and crow diameter were measured of each one of the 190 trees. Every sample tree was felled down and sectioned in the following components: stem, thick branches (diameter ≥ 4 cm), thin branches (diameter < 4 cm), foliage, and dead branches. The green weigth of each tree component was weighted in the field. Small sub samples of each tree component were also weighted in the field and brought to the laboratory for oven dry. Thus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Green weight; Dry weight; Carbon content; Mimosa scabrella Peso verde; Peso seco; Teor de carbono; Bracatingais.
Ano: 2011 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/213
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การศึกษาการตอบสนองทางสรีรวิทยาของข้าวโพดเลี้ยงสัตว์ต่อสภาวะน้ำท่วมขังระยะสั้น Thai Agricultural
Peerasak Chaiprasart; Makawat Pasitwilitum; Somchai Boonpradub.
Palavras-chave: Corn; Maize; Water logging; Growth rate; Dry weight; Anthesis silking interval; Chlorophyll content; ข้าวโพด; ข้าวโพดเลี้ยงสัตว์; สภาวะน้ำท่วมขัง; ระยะสั้น; การตอบสนองทางสรีรวิทยา.
Ano: 2003 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4535
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