Accompanying ions of ammonium sources and nitrate : ammonium ratios in tomato plants          下载免费PDF全文

Rafael Ferreira Barreto  Flávio José Rodrigues Cruz  Lucas Aparecido Gaion  Renato de Mello Prado  Rogério Falleiros Carvalho 《植物养料与土壤学杂志》2018,181(3):382-387

The tomato (Solanum lycopersicum L.) cultivar Micro‐Tom (MT) is widely used in physiological studies, but the effects of nitrate ( ) and ammonium ( ) ratios ( : ratios) and, in particular, the effects of the accompanying ions in sources are unknown. To determine whether the accompanying ions in sources influence toxicity, the effects of : ratios on the physiology, electrolyte leakage index, nutrition, and dry weight were studied using hydroponics. The sources were ammonium chloride (NH₄Cl) or ammonium sulfate [(NH₄)₂SO₄], and five : ratios were used: 100 : 0, 75 : 25, 50 : 50, 25 : 75, and 0 : 100. The source was calcium nitrate [Ca(NO₃)₂], and the nitrogen (N) concentration was 15 mmol L^?1. The results indicate that NH₄Cl or (NH₄)₂SO₄ can be used in studies on toxicity because the accompanying ions did not influence the tomato plants. In addition, : ratios of 100 : 0 and 75 : 25 resulted in the highest dry weight of tomato plants, whereas ratios of 25 : 75 or 0 : 100 were toxic.  相似文献   

Plication of the free wall of the left ventricle in dogs with doxorubicin-induced cardiomyopathy   总被引：1，自引：0，他引：1  

de Andrade JN  Camacho AA  Santos PS  Fantinatti AP  Nunes N  Stopiglia AJ 《American journal of veterinary research》2005,66(2):238-243

OBJECTIVE: To evaluate plication of the free wall of the left ventricle, which reduces the left ventricular area and volume, as a method to improve the left ventricular systolic function without cardiopulmonary bypass. ANIMALS: 8 mixed-breed adult dogs. PROCEDURE: Dilated cardiomyopathy (DCM) was induced in each dog by administration of doxorubicin (30 mg/m2, i.v., q 21 d for 168 days).Two dogs died during induction of cardiomyopathy. Plication surgery was performed in 4 dogs. Two dogs did not ondergo to surgery (control group). Values for cardiac output (CO), 2-dimensional and M-mode echocardiography, arterial blood pressure, electrocardiography, blood cell counts, and serum biochemical analyses were recorded after induction of DCM (baseline) and 1, 2, 7, 15, 21, 30, 60, 90, 120, 150, and 180 days after plication surgery. Ambulatory ECG (Holter) recordings were conducted for 24 hours on the day of surgery. RESULTS: 1 dog died after plication surgery. The remaining dogs undergoing ventricular plication had a significant improvement in CO, ejection fraction, and fractional shortening and reductions of left ventricular area and volume after surgery. Electrocardiographic and Holter recordings revealed premature ventricular complexes, which resolved without treatment during the first week after surgery. Clinical condition of the control dogs declined, and these 2 dogs died approximately 40 days after induction of cardiomyopathy. CONCLUSIONS AND CLINICAL RELEVANCE: Plication of the free wall of the left ventricle improved left ventricular systolic function in dogs with doxorubicin-induced cardiomyopathy. Additional studies are needed to evaluate its application in dogs with naturally developing DCM.  相似文献   

The effects of different inspired oxygen fractions on gas exchange and Tei‐index of myocardial performance in propofol‐anesthetized dogs     

Patrícia C Ferro Lopes  Newton Nunes  Marlos G Sousa  Celina TD Nishimori  Roberta Carareto  Paulo Sérgio P dos Santos  Aparecido A Camacho 《Veterinary anaesthesia and analgesia》2013,40(6):573-583

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Effect of association of fresh cassava root with corn silage in replacement for cactus cladodes on dairy cow performance     

de Albuquerque Saraiva  Tibério  de Figueiredo Monteiro  Carolina Corrêa  Feitosa  Erickson Marcos Santos  de Oliveira Moraes  Gláucia Sabrine  Netto  Antonio Joelson  Cardoso  Daniel Barros  Magalhães  André Luiz Rodrigues  de Melo  Airon Aparecido Silva 《Tropical animal health and production》2020,52(3):927-933

Tropical Animal Health and Production - The aim of this study was to investigate the replacement effect of cactus cladodes with cassava root and corn silage (CRCS) (0, 25, 50, 75, and 100%, dry...  相似文献   

Replacement of wheat bran with spineless cactus (Opuntia ficus indica Mill cv Gigante) and urea in the diets of Holstein x Gyr heifers     

Carolina Corrêa de Figueiredo Monteiro  Airon Aparecido Silva de Melo  Marcelo Andrade Ferreira  José Mauricio de Souza Campos  Julyana Sena Rodrigues Souza  Evannielly Thuanny dos Santos Silva  Rafael de Paula Xavier de Andrade  Emmanuelle Cordeiro da Silva 《Tropical animal health and production》2014,46(7):1149-1154

The aim of this study was to evaluate the replacement effect of wheat bran with spineless cactus and urea in heifers. Twenty-four heifers with an average initial weight of 185?±?13 kg were used in this experiment. Four levels of spineless cactus corrected with urea and ammonium sulfate (9:1) were studied: 0, 33, 66, and 100 % replacement with wheat bran. Samples of feed, orts, and feces were analyzed to estimate the intake and digestibility of dry matter (DM) and nutrients. Indigestible neutral detergent fiber was used as an internal marker. The experiment was conducted in a completely randomized design. Dry matter, neutral detergent fiber, and total digestible nutrient intake demonstrated a quadratic effect (P?P?P?相似文献   

The effects of the number,size and isolation of patches along a gradient of native vegetation cover: how can we increment habitat availability?     

Renato Crouzeilles  Jayme Augusto Prevedello  Marcos de Souza Lima Figueiredo  Maria Lucia Lorini  Carlos Eduardo Viveiros Grelle 《Landscape Ecology》2014,29(3):479-489

Habitat availability—or how much habitat species can reach at the landscape scale—depends primarily on the percentage of native cover. However, attributes of landscape configuration such as the number, size and isolation of habitat patches may have complementary effects on habitat availability, with implications for the management of landscapes. Here, we determined whether, and at which percentages of native cover, the number, size and isolation of patches contribute for habitat availability. We quantified habitat availability in 325 landscapes spread across the state of Rio de Janeiro, in the Atlantic Forest hotspot, with either high (>50 %), intermediate (50–30 %), low (30–10 %) or very low (<10 %) percentage of native cover, and for six hypothetical species differing in inter-patch dispersal ability. Above 50 % of native cover, the percentage of cover per se was the only determinant of habitat availability, but below 50 % the attributes of landscape configuration also contributed for habitat availability. The number of patches had a negative effect on habitat availability in landscapes with 50–10 % of native cover, whereas patch size had a positive effect in landscapes with <10 % of native cover. The different species generally responded to the same set of landscape attributes, although to different extents, potentially facilitating decision making for conservation. In landscapes with >50 % of native cover, conservation actions are probably sufficient to guarantee habitat availability, whereas in the remaining landscapes additional restoration efforts are needed, especially to reconnect and/or enlarge remaining habitat patches.  相似文献   

Plantation rows as dispersal routes: A test with didelphid marsupials in the Atlantic Forest, Brazil     

Jayme A. Prevedello  Marcus V. Vieira 《Biological conservation》2010,143(1):131-135

Anecdotal observations suggest that some vertebrates follow plantation rows when crossing between habitat patches in fragmented landscapes, but the frequency of such behavior was never formally tested despite its potential implications for landscape management. We experimentally tested if the didelphid marsupials Didelphis aurita and Philander frenatus use plantation rows as guidelines when searching for habitat patches in a landscape of fragmented Atlantic Forest in Brazil. Thirty-seven individuals of P. frenatus and 24 of D. aurita were captured in forest fragments and released carrying spool-and-line tracking devices at four distances (30-200 m) from a forest fragment, in a matrix of manioc plantations. Animals of both species used plantation rows to orient their initial movements and used rows as guidelines along their paths for navigating in the matrix. By moving predominantly parallel to the plantation rows animals reduced the tortuosity of their paths and obtained an unobstructed view of the landscape ahead. These results demonstrate that the orientation of linear plantations can strongly influence functional connectivity between habitat fragments. Plantation rows should be oriented to maximize connection between nearby fragments, enhancing dispersal success of these species and probably many other terrestrial vertebrates in agricultural landscapes.  相似文献   

Genetic variation and phylogenetic relationships based on RAPD analysis in section Caulorrhizae, genus Arachis (Leguminosae)     

Marcos Aparecido Gimenes  Catalina Romero Lopes  Maria Leticia Galgaro  José Francisco Montenegro Valls  Gary Kochert 《Euphytica》2000,116(3):187-195

Wild Arachis germplasm includes potential forage species, such as the rhizomatous Arachis glabrata and the stoloniferous A. pinto and A. repens. Commercial cultivars of A. pintoi have already been released in Australia and in several Latin American countries, and most of these cultivars were derived from a single accession of A. pintoi (GK 12787). Arachis repens is less productive as a forage plant than is A. pintoi. However, it can be crossed with A. pintoi, and thus has good potential as germplasm for the improvement of A. pintoi. Arachis repens is also used as an ornamental plant and ground cover. Many new accessions of these two stoloniferous species are now available, and they harbor significant genetic variability beyond that available in the few older accessions, previously available. Therefore, these new accessions need to be conserved, documented and considered in terms of their potential for crop improvement and direct commercial use. Sixty-four accessions of this new germplasm were analyzed using RAPD analysis. Most of the accessions of A. repens grouped together into a clearly distinct group. In general, the accessions from the distinct valleys of the Jequitinhonha, São Francisco and Paranã rivers did not group together, suggesting there is not a tight relation between dispersion by rivers and the geographic distribution of genetic variation in these species.  相似文献   

Effect of the Lactiplantibacillus plantarum and Lentilactobacillus buchneri on corn and sorghum silage quality and sheep energy partition under tropical conditions     

Frederico Patrus Ananias de Assis Pires  Thierry Ribeiro Tomich  Luiz Gustavo Ribeiro Pereira  Fernanda Samarini Machado  Mariana Magalhães Campos  Alan Figueiredo de Oliveira  Guilherme Lobato Menezes  Rafael Araújo de Menezes  Pamella Grossi de Sousa  Diogo Gonzaga Jayme  Lúcio Carlos Gonçalves 《Grass and Forage Science》2023,78(1):224-235

This study aimed to evaluate the silage quality, ingestive behaviour, and sheep energy partition fed corn and sorghum silages, with or without inoculation with Lactiplantibacillus plantarum and Lentilactobacillus buchneri. Whole plants of one dent corn hybrid (DCS), one flint corn hybrid (FCS), and one forage sorghum hybrid (SS) were ensiled with or without an inoculant containing L. plantarum and L. buchneri (4 × 10⁵ CFU g⁻¹), totalling six treatments (3 × 2 factorial scheme). The treatments were ensiled in metal drums with 200 L capacity. The lactic acid concentrations in the inoculated FCS and DCS were higher by 13.4% and 12.8%, respectively, than those in the non-inoculated plants. In contrast, the lactic acid concentration in the inoculated SS was 23.1% lower than that in the non-inoculated SS. Furthermore, there were differences in pH and acetic acid concentrations only in SS, which were 2.3% and 45.2% higher, respectively, in inoculated silage than in non-inoculated silage. In inoculated DCS and SS, propionic acid concentrations were 1.7 times higher (for both silages), and 1-propanol was 3.7 and 1.8 times higher compared than those in non-inoculated silages. There was a main effect of the inoculant on 1,2-propanediol concentrations, which were 37.5% higher in inoculated silages than in non-inoculated silages. However, ingestive behaviour, heat and methane production, and silage net energy concentrations were not affected by inoculant use. Fermentative modifications caused by inoculation with L. plantarum and L. buchneri in whole plant corn or sorghum silage did not modify sheep energy partition.  相似文献