Publicações - ciências agrárias
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SCHIEHL, MARINO;
FRANÇA, TATIANE OTTO DE;
Luis Antonio Biasi
Palavra-chave:
Micropropagação;
Amoreira preta
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Fitotecnia; Produção de Mudas
resumo ...
(en)
In vitro production of blackberry seedlings makes it possible to obtain seedlings quickly and healthy. The objective of this research was to optimize a micropropagation protocol of the 'Xingu' blackberry, defining the most efficient BAP concentration for multiplication, the best gelling agent and to verify the need for IBA in ex vitro rooting and survival during acclimatization. BAP concentrations (0, 2.5, 5, 7.5 and 10 µM) were evaluated by 3 subcultures. The gelling agents evaluated were Gelrite® (2 g L-1), Vetec® brand agar (7 g L-1) and liquid medium. Rooting of shoots, treated with IBA concentrations (0; 2.5; 4.9 and 9,8mM), was performed ex vitro in a nebulization chamber. There was an increase in the amount of shoots formed with increasing BAP concentration, up to 5.0 µM. Agar was the gelling agent that generated higher quality explants and less hyperhydricity. Rooting and survival rates of ex vitro explants were 100% in all evaluated treatments. The blackberry cv. Xingu can be micropropagated in MS culture medium plus 5 µM BAP and solidified with agar (7 g L-1) and rooting can be performed ex vitro during acclimatization without the need for auxins.
(pt)
A produção de mudas in vitro de amoreira-preta possibilita a obtenção rápida e sadia de mudas. O objetivo dessa pesquisa foi otimizar um protocolo de micropropagação da amoreira-preta ‘Xingu’, definindo a concentração mais eficiente de BAP para multiplicação, o melhor agente gelificante a necessidade de AIB no enraizamento ex vitro e a sobrevivência durante a aclimatização. As concentrações de BAP (0; 2,5; 5; 7,5 e 10 µM) foram avaliadas por 3 subcultivos. Os agentes gelificantes avaliados foram Gelrite® (2 g L-1), ágar da marca Vetec® (7 g L-1) e meio líquido. O enraizamento das brotações, tratadas com concentrações de AIB (0; 2,5; 4,9 e 9,8 mM), foi realizado ex vitro em câmara de nebulização. Houve um aumento na quantidade de brotações formadas com o aumento das concentrações de BAP, até a concentração de 5,0 µM. O ágar foi o agente gelificante que gerou explantes com maior qualidade e menos hiperhidricidade. A taxa de enraizamento e sobrevivência dos explantes ex vitro foi de 100 % em todos os tratamentos avaliados. A amoreira-preta cv. Xingu pode ser micropropagada em meio de cultura MS acrescido de 5 µM de BAP e solidificado com ágar (7 g L-1) e o enraizamento pode ser realizado ex vitro durante a aclimatização, sem a necessidade de auxinas.
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Letícia Siqueira Walter;
Mônica Moreno Gabira;
Marcelle Almeida da Silva;
Antonio Carlos Nogueira;
Dagma Kratz
Palavra-chave:
Caatinga;
Pinhão-bravo;
seeds analysis;
viability.
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Sementes Florestais
resumo ...
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Letícia Siqueira Walter;
Mônica Moreno Gabira;
Marcelle Almeida da Silva;
Antonio Carlos Nogueira;
Dagma Kratz
Palavra-chave:
Caatinga;
Pinhão-bravo;
seeds analysis;
viability.
resumo ...
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DENIZ, MATHEUS;
DE SOUSA, KAROLINI TENFFEN;
Marcos Martinez do Vale;
DITTRICH, JOÃO RICARDO
Palavra-chave:
Animal behavior;
Social hierarchy;
Applied ethology;
Dominance value;
Dyads level
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Tecnologia de Alimentos;
CIENCIAS_AGRARIAS; Zootecnia; Bem-estar; Análise de som;
CIENCIAS_AGRARIAS; Zootecnia; Ecologia dos Animais Domésticos e Etologia
resumo ...
The aims of this observational study were to (1) define which animal’s phenotypic characteristics determine social position in the context of a commercial organic farm with mixed herd (horned and non-horned cows) and (2) determine the influence of social position on the time at the feeder. We took the following measurements from 27 dairy cows in lactation: body mass, age, body condition score, body length, withers height, distance between horns, horn circumference and length. Replacement and time at the feeder were recorded for 1 h at the time of supplementation. Dominance values for each animal were calculated and the herd was divided into three social categories: dominant (D), intermediate (I) and subordinate (S). Age, body length and body mass influenced (p < 0.001) dominance value of all animals. The presence of horn influenced (p = 0.034) the dominance value of the I and S animals because it was a unique characteristic of these categories. Dominant (84.3%) and intermediate (75.2%) animals spend more time (p < 0.05) at the feeder than the subordinate (59.5%); however, dominant animals tended (p = 0.093) to spend more time at the feeder than the intermediate animals. The social position of an animal was influenced by its age, body mass and body length, and its social position influenced the time at the feeder.
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Lorena da Silva Soler;
Luis Antonio Biasi
Palavra-chave:
amora-preta;
cultivares;
Fenologia
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Fitotecnia; Manejo e Tratos Culturais
resumo ...
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Aline Aparecida dos Santos;
Jorge L Moretti de Souza;
Stefanie Lais Kreutz Rosa
Acta Iguazu,
v. 9,
n. 4,
p. 88-101,
2020
Palavra-chave:
Solos;
Atributos do solo;
Física do Solo
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Engenharia Agrícola; Engenharia de Água e Solo
resumo ...
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PONTONI, DANIEL RAMOS;
Beatriz Monte Serrat;
POGGERE, GIOVANA CLARICE;
BARBOSA, JULIERME ZIMMER;
ARAUJO, ELOÁ MOURA;
CORRÊA, RODRIGO STUDART;
Motta, Antonio Carlos Vargas
Palavra-chave:
Biossólido;
Fertilidade do solo;
residous organicos
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Ciência do Solo; Fertilidade do Solo e Adubação;
CIENCIAS_AGRARIAS; Agronomia; Ciência do Solo; Nutrição Mineral de Plantas
resumo ...
(en)
The application of alkaline sewage sludge to agricultural soils has increased, but nutritional implications for crops are still poorly explored. In order to evaluate the effect of alkalinized sewage sludge on nutrition and growth of common bean (Phaseolus vulgaris L.), a greenhouse experiment was carried out using three Ferralsols and three sewage sludge types. Soil samples of loam, very clayey, and clayey Ferralsol were collected from three geologically distinct regions (sandstone, basalt, and argillite, respectively) of Paraná State, Brazil. Samples of sewage sludge were stabilized with lime (Ca-Mg oxide) and subsequently mixed with the soil samples. Alkaline stabilized sewage sludge and lime were applied to soils at rates of 50, 100, 150 and 200% the amount necessary to reach pH 5.5. Plants were sown and on the 67th day after sprouting were harvested. Shoot dry matter (DM) and height, and elemental composition of leaves were measured. Comparing to lime, the alkalinized sewage sludge had a greater effect on the shoot DM in the clayey soils. The alkaline sewage sludge applied to soils resulted in higher Zn and P contents in plant shoots than did the lime, while both amendments reduced K and Mn contents in shoots. The relationship of Fe/Mn showed very effective to explain foliar symptoms occurrence under very acid condition. The alkaline sewage sludge showed a superior performance to nourish and promote the growth of common bean in the clayey soil compared to agriculture lime.
(pt)
A aplicação de lodo de esgoto alcalino em solos agrícolas aumentou, mas as implicações nutricionais para as culturas ainda são pouco exploradas. Com o objetivo de avaliar o efeito do lodo de esgoto alcalinizado na nutrição e crescimento do feijoeiro (Phaseolus vulgaris L.), foi realizado experimento em casa de vegetação com três Latossolos e três tipos de lodo de esgoto. Amostras de Latossolos (texturas franca, muito argilosa e argilosa) foram coletadas em três regiões geologicamente distintas do estado do Paraná, Brasil: arenito, basalto e argilito. Amostras de lodo de esgoto foram estabilizadas com calcário e posteriormente misturadas com as amostras de solo. Lodo de esgoto alcalinizado e calcário foram aplicados aos solos nas taxas correspondentes a 50, 100, 150 e 200% da quantidade necessária para o solo atingir pH 5,5. Aos 67 dias após emergência, foram medidas a altura das plantas, matéria seca da parte aérea e composição elementar das folhas. Em comparação ao calcário, o lodo alcalinizado promoveu maior produção de matéria seca da planta nos solos argilosos. O lodo de esgoto alcalinizado aplicado aos solos resultou em maiores teores de Zn e P na parte aérea da planta do que o calcário, enquanto ambos os corretivos reduziram os teores de K e Mn na parte aérea. A relação Fe/Mn mostrou ser muito efetivo para explicar sintomas foliares que foram observados sob condição de elevada acidez. O lodo alcalinizado apresentou desempenho superior quanto à nutrição e promoção do crescimento do feijoeiro no solo argiloso.
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PONTONI, DANIEL RAMOS;
Beatriz Monte Serrat;
POGGERE, GIOVANA CLARICE;
BARBOSA, JULIERME ZIMMER;
ARAUJO, ELOÁ MOURA;
CORRÊA, RODRIGO STUDART;
ANTÔNIO CARLOS VARGAS MOTTA
Palavra-chave:
Biossólido;
Fertilidade do solo;
residous organicos
resumo ...
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Ramon Grigio;
Fábio Meurer
Palavra-chave:
Aquaculture;
aquatic system;
Breeding;
fish production;
jundiá;
native fish
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Pesqueiros e Engenharia de Pesca; Aqüicultura; Piscicultura
resumo ...
(en)
The world aquaculture scenario has undergone several changes due to the deficit in natural fish reserves, which has led to the growth of aquaculture activities to the point of them being considered the leading sector in food production. In Brazil, this activity is increasing rapidly, and the most common commercially cultivated species is the Nile tilapia. Southern Brazil presents a more rigorous winter period than the other Brazilian regions, when aquaculture activities present several unoccupied tanks, generating low productivity and decreases in producer income. In search of an alternative to this problem, the present study aimed to evaluate the alternating production of Nile tilapia ( Oreochromis niloticus ) and silver catfish or silver catfish ( Rhamdia quelen ), a native fish that displays adequate growth during the cold period. Fish were divided into two phases, rearing and fattening, and the volume of water used for rearing was 3 times lower than that used for fattening. Tilapia fingerlings were bred in winter months and fattened during summer months, while silver catfish fingerlings were bred in summer months and fattened during winter months. Morphometric and performance parameters were analyzed. The experimental breeding of both Nile tilapia and silver catfish presented promising results. Extrapolating the data obtained herein for the occupation of a productive area close to the ideal, a productivity per species similar to that reached in commercial productions in the region would be obtained. Thus, alternating Nile tilapia and silver catfish farming is a viable alternative for Southern Brazilian aquaculture, as it maintains fish production year round, even during cold periods.
(pt)
The world aquaculture scenario has undergone several changes due to the deficit in natural fish reserves, which has led to the growth of aquaculture activities to the point of them being considered the leading sector in food production. In Brazil, this activity is increasing rapidly, and the most common commercially cultivated species is the Nile tilapia. Southern Brazil presents a more rigorous winter period than the other Brazilian regions, when aquaculture activities present several unoccupied tanks, generating low productivity and decreases in producer income. In search of an alternative to this problem, the present study aimed to evaluate the alternating production of Nile tilapia ( Oreochromis niloticus ) and silver catfish or silver catfish ( Rhamdia quelen ), a native fish that displays adequate growth during the cold period. Fish were divided into two phases, rearing and fattening, and the volume of water used for rearing was 3 times lower than that used for fattening. Tilapia fingerlings were bred in winter months and fattened during summer months, while silver catfish fingerlings were bred in summer months and fattened during winter months. Morphometric and performance parameters were analyzed. The experimental breeding of both Nile tilapia and silver catfish presented promising results. Extrapolating the data obtained herein for the occupation of a productive area close to the ideal, a productivity per species similar to that reached in commercial productions in the region would be obtained. Thus, alternating Nile tilapia and silver catfish farming is a viable alternative for Southern Brazilian aquaculture, as it maintains fish production year round, even during cold periods.
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NASCIMENTO, BÁRBARA MAZETTI;
SILVA, GISELE FERREIRA DA;
CARVALHEIRO, ROBERTO;
TEIXEIRA, RODRIGO DE ALMEIDA;
Laila Talarico Dias Teixeira
Palavra-chave:
selection criteria;
hip height;
visual scores
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Zootecnia; Genética e Melhoramento dos Animais Domésticos
resumo ...
ABSTRACT The objective of this study was to estimate adjustment factors of scrotal circumference for growth traits in Nellore cattle. Measurement at post-yearling of scrotal circumference from 100,107 Nellore was adjusted for six traits: age (A), body weight (BW), hip height (HH), conformation (C), precocity (P), musculature (M), and simultaneously for age and the other five traits (A-BW, A-HH, A-C, A-P, A-M), body weight and the other four traits (BW-HH, BW-C, BW-P, BW-M), and hip height and the other three [...]
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