Agrarian science最新文献_第10页

Study of the specific features in the histological structure of the longissimus muscle dorsi in animals of the genus Ovis 研究羱羊属动物背阔肌组织学结构的特殊性

Agrarian science Pub Date : 2023-11-24 DOI: 10.32634/0869-8155-2023-376-11-41-45

N. A. Volkova, L. A. Volkova

{"title":"Study of the specific features in the histological structure of the longissimus muscle dorsi in animals of the genus Ovis","authors":"N. A. Volkova, L. A. Volkova","doi":"10.32634/0869-8155-2023-376-11-41-45","DOIUrl":"https://doi.org/10.32634/0869-8155-2023-376-11-41-45","url":null,"abstract":"Relevance. Interspecific hybridization of domestic animals with wild related species is considered as one of the promising directions in animal husbandry in the framework of improving the quality and nutrient biodiversity of livestock products. The article shows the research results of the specific features in the histological structure of the longissimus muscle dorsi in animals of the genus Ovis with different genotypes.Methods. The object of research was sheep of the Romanov breed and interspecific hybrids of domestic sheep (Romanov breed) with argali. Histological studies of the longissimus dorsi muscle of purebred and hybrid animals at the age of 12 months were carried out in a comparative aspect. The thickness and area of muscle fibers, muscle bundles, the number of muscle fibers per unit cross-sectional areas were studied.Results. Differences in a number of morphometric parameters in the main structural units of the longissimus dorsi muscle in hybrid animals depending on the genotype were revealed. In hybrid animals, in comparison with purebred sheep, a decrease in the thickness and area of muscle fibers by 12% and 25% was found (p < 0.01). An increase in the number of muscle fibers per 1 mm2 of the cut and a decrease in the proportion of connective tissue in the structure of the longissimus dorsi muscle in interspecific hybrids were shown in comparison with those in sheep of the Romanov breed (p < 0.01). These biological features of hybrid animals should be taken into account when breeding, selecting and using them to obtain meat and meat products.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139240754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The study of acute and subchronic oral toxicity of medicinal drug «Enrocolitrim» on laboratory animals 研究药用药物 "烯酰草胺 "对实验动物的急性和亚慢性口服毒性

Agrarian science Pub Date : 2023-11-24 DOI: 10.32634/0869-8155-2023-376-11-21-26

S. V. Abramov, A. V. Balyshev, V. V. Golovin, N. M. Starikov, M. S. Zhuravleva

{"title":"The study of acute and subchronic oral toxicity of medicinal drug «Enrocolitrim» on laboratory animals","authors":"S. V. Abramov, A. V. Balyshev, V. V. Golovin, N. M. Starikov, M. S. Zhuravleva","doi":"10.32634/0869-8155-2023-376-11-21-26","DOIUrl":"https://doi.org/10.32634/0869-8155-2023-376-11-21-26","url":null,"abstract":"Relevance. The results of the study of the oral toxicity of the medicinal product for veterinary use «Enrocolitrim» on laboratory rodents are presented. Studies of acute toxicity in mice and rats with the determination of the hazard class are described, as well as data on the study of subchronic toxicity of the drug for 14 days in laboratory rats are presented.Methods. To determine the acute toxicity of the drug, 36 outbred rats and 50 outbred mice were used. «Enrocolytrim» was administered using an intragastric tube at doses that allow revealing a dose-dependent effect to assess LD50. Toxicity parameters were calculated according to the method of Kerber, Miller and Teintner, the nature and severity of signs of animal intoxication were visually assessed for 14 days. In a subchronic experiment, the study drug «Enrokolitrim» was studied on 40 outbred rats, of which 3 experimental and 1 control groups were formed. During the experiment, the rodents were weighed, signs of intoxication were recorded, and blood samples were taken for morphological and biochemical analyzes. Dead and euthanized animals were subjected to autopsy.Results. The obtained LD50 values with a single oral administration of the drug «Enrocolitrim» to rats and mice allowed it to be assigned the 4th hazard class – lowh–azard substances (GOST 12.1.007-76). In a subchronic 14-day experiment on rats, it was found that the dose of «Enrocolitrim» 1243 mg/kg with intragastric administration is toxic, and doses of 621.5 mg/kg and 248.6 mg/kg are inactive (safe).","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"32 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139242389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ocorrência de parasitoide Cotesia plutellae (Hymenoptera: Braconidae) sobre Plutella xylostella (Lepidoptera: Plutellidae) na cultura de brássica 在brassica培养中，寄生蜂(膜翅目:茧蜂科)对小菜蛾(鳞翅目:茧蜂科)的发生

Agrarian science Pub Date : 2023-09-29 DOI: 10.30612/agrarian.v16i56.16875

Quizido Delfim Mutacate, Paulo Guilherme, Rodrigues Agostinho Marcos, Belmiro dos Santos Dias Malamo

{"title":"Ocorrência de parasitoide Cotesia plutellae (Hymenoptera: Braconidae) sobre Plutella xylostella (Lepidoptera: Plutellidae) na cultura de brássica","authors":"Quizido Delfim Mutacate, Paulo Guilherme, Rodrigues Agostinho Marcos, Belmiro dos Santos Dias Malamo","doi":"10.30612/agrarian.v16i56.16875","DOIUrl":"https://doi.org/10.30612/agrarian.v16i56.16875","url":null,"abstract":"A traça-da-couve (Plutella xylostella) é um inseto que provoca perdas de produção das brássicas. Determinadas populações de P. xylostella expressam resistência à inseticidas resultando no difícil manejo e consequentemente demanda maiores aplicações de agrotóxicos levando à redução de inimigos naturais e poluição ambiental, neste sentido a pesquisa teve como objetivo avaliar a ocorrência de parasitoides de Cotesia plutellae sobre a P. xylostella nas culturas brássicas, para o efeito foi instalado um experimento usando o delineamento de blocos casualizados ma área total de 525 m2. Após análises de variância, constatou-se porcentagens de parasitismo da C. plutellae sobre a P. xylostella de 43.12%, 26.79%, 20.83 e 13.73% para as variedades Tronchuda, Mostarda, KK Cross e Copenhagen Market, no estágio larval 1 a maior densidade média foi registrada quando as larvas tiveram a variedade Tronchuda como hospedeiro com 9.92 larvas/planta, sendo superior às registradas em variedade Mostarda, KK Cross e Copenhagen.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135193091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbono e matéria orgânica do solo em sistema de manejo de produção de pastagem: uma revisão sistemática com meta-análise 牧场生产管理系统中的碳与土壤有机质:系统综述与荟萃分析

Agrarian science Pub Date : 2023-09-29 DOI: 10.30612/agrarian.v16i56.17176

Larissa da Luz Silva, Adriana Aparecida Ribon, Clarice Backes

引用次数: 0

Poda de hastes e raleio em pimenteira visando porte e qualidade dos frutos 修剪茎和修剪辣椒的大小和果实质量

Agrarian science Pub Date : 2023-09-29 DOI: 10.30612/agrarian.v16i56.17155

Tiago José Leme de Lima de Nadai, Luana Ferreira Marchi, Guilherme José Ceccherini, Fernando Cesar Sala, Luis Felipe Villani Purqueiro

引用次数: 0

Longevidade e qualidade de hastes florais de Denphal em soluções conservantes 丹福花茎在防腐剂溶液中的寿命和质量

Agrarian science Pub Date : 2023-09-29 DOI: 10.30612/agrarian.v16i56.17102

Thiago Souza Campos, Antonio Maricélio Borges de Souza, Guilherme Rodrigues Vieira, Ana Carolina Corrêa Muniz, Rubens de Oliveira Meireles, Kathia Fernandes Lopes Pivetta

引用次数: 0

Níveis de compactação e sistemas de preparo sobre atributos físicos do solo e componentes de produção da soja 压实水平和耕作系统对土壤物理属性和大豆生产成分的影响

Agrarian science Pub Date : 2023-09-29 DOI: 10.30612/agrarian.v16i56.17037

Thayná Mendes Machado, Cristiano Márcio Alves de Souza, Sálvio Napoleão Soares Arcoverde, Andressa Chagas, Nelci Olszevski, Jorge Wilson Cortez

{"title":"Níveis de compactação e sistemas de preparo sobre atributos físicos do solo e componentes de produção da soja","authors":"Thayná Mendes Machado, Cristiano Márcio Alves de Souza, Sálvio Napoleão Soares Arcoverde, Andressa Chagas, Nelci Olszevski, Jorge Wilson Cortez","doi":"10.30612/agrarian.v16i56.17037","DOIUrl":"https://doi.org/10.30612/agrarian.v16i56.17037","url":null,"abstract":"A compactação decorrente do tráfego de máquinas é o principal causador de degradação do solo, podendo acarretar prejuízos a sua qualidade e à produtividade agrícola. Objetivou-se avaliar a compactação do solo em dois sistemas de manejo e suas relações com os atributos físicos do solo e componentes de produtividade da soja. O experimento foi realizado em um Latossolo Vermelho Distroférrico, com delineamento em blocos casualizados em esquema de parcelas subdivididas, sendo dois sistemas de manejo (preparo convencional e plantio direto) e quatro níveis de compactação induzidas do solo (zero, três, seis e nove passagens de um trator agrícola), com quatro repetições. Realizou-o teste Student-Newman-Keuls (SNK), a 5% de probabilidade, para comparar as médias dos dados nos dois sistemas de manejo, e análise de regressão para avaliar o efeito dos níveis de compactação sobre os atributos físicos e a relação destes com os componentes de produção. O aumento do nível de compactação do solo propiciou aumento da densidade, reduções da macroporosidade e porosidade total na camada subsuperficial do solo, principalmente na área com preparo convencional. O crescimento e os componentes de produção da soja não foram influenciados pelos sistemas de preparo do solo, enquanto com o incremento dos níveis de compactação ocorreu redução da produtividade de grãos.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135193256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil microbial biomass carbon and Jatropha curcas yield intecropping with forages and crop species 土壤微生物生物量碳和麻疯树产量与牧草和作物品种混作

Agrarian science Pub Date : 2023-09-29 DOI: 10.30612/agrarian.v16i56.17226

Alessandra Oliveira da Silva, João Alfredo Neto da Silva, Sálvio Napoleão Soares Arcoverde, Graciela Benites de Oliveira, Egas José Armando, Cesar José da Silva

{"title":"Soil microbial biomass carbon and Jatropha curcas yield intecropping with forages and crop species","authors":"Alessandra Oliveira da Silva, João Alfredo Neto da Silva, Sálvio Napoleão Soares Arcoverde, Graciela Benites de Oliveira, Egas José Armando, Cesar José da Silva","doi":"10.30612/agrarian.v16i56.17226","DOIUrl":"https://doi.org/10.30612/agrarian.v16i56.17226","url":null,"abstract":"The domestication of Jatropha curcas L. in the Brazilian territory has been boosted by its great potential in the production of grains, oil and, in particular, its adaptation in different soil and climatic conditions. The aim of this research was evaluate the soil biological quality through the soil microbial biomass carbon and its indices derivate (metabolic and microbial quotient) under J. curcas intercropping with many forages species, legumes and annual crop rotation systems, as well as the accumulated production of J. curcas grains and oil. The experiment was conducted in a commercial area in the randomized blocks experimental design with the treatments arranged in a 12 x 2 factorial design, with four repetitions, resulting in 12 treatments with cropping systems and 2 sampling times (February 2012 and May 2012). Soil sampling was performed in February and May 2012, at 0 at 10 cm layer and four composite samples were collected in each cropping system, from five subsamples in each plot. J. curcas intercropping with B. ruziziensis, favors the maintenance of the community of soil microorganisms compared to the treatment with the species P. maximum cv. Massai and Cajanus cajan, which promoted decreasing in soil organic matter dynamics, when compared to the other cropping systems. The monocropping systems of J. curcas and intercropping in rotation systems 2 and 3 achieved higher yields of J. curcas grains and oil over three seasons.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135193257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Avaliação econômica da lambaricultura em Aquidauana, MS, a partir de um estudo de caso 以个案研究为基础，对阿奎达瓦纳马铃薯养殖的经济评价

Agrarian science Pub Date : 2023-09-29 DOI: 10.30612/agrarian.v16i56.17244

Rubia Mara Gomes Acunha, Adriana Fernandes de Barros, André Luiz Julien Ferraz, Cristiane Meldau de Campos

引用次数: 0

Variabilidade espacial dos componentes produtivos da cultura da soja 大豆作物产量成分的空间变异性

Agrarian science Pub Date : 2023-09-29 DOI: 10.30612/agrarian.v16i56.16682

Luiz Claudio Rodrigues, Cassiano Garcia Roque, Fernando França da Cunha, Paulo Cezar Gomes de Assunção, Gabriela Vitória Souza, Fabio Henrique Rojo Baio, Job Teixeira de Oliveira

引用次数: 0