Scientia Agraria Paranaensis最新文献_第10页

Characterization of properties and deterioration by termites in the Pinus elliottii Engelm. wood 白蚁对湿地松特性及退化的影响。木

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.23682

Ezequiel Gallio, H. Costa, L. Guerreiro, N. Cruz, R. Beltrame, D. Gatto

{"title":"Characterization of properties and deterioration by termites in the Pinus elliottii Engelm. wood","authors":"Ezequiel Gallio, H. Costa, L. Guerreiro, N. Cruz, R. Beltrame, D. Gatto","doi":"10.18188/sap.v19i3.23682","DOIUrl":"https://doi.org/10.18188/sap.v19i3.23682","url":null,"abstract":"The technological properties of wood are constituted by parameters, which after being analyzed, make it possible to define an appropriate use for this material. However, the deterioration of the wood due to the attack of termites, which find their food source in the chemical components, ends up altering these original technological characteristics, reducing their useful life and compromising their use. Thus, this study aimed to determine some technological properties of Pinus elliottii, as well as to evaluate the influence of deterioration caused by Nasutitermes termites in this wood. Specimens with dimensions of 20 x 20 x 150 mm (tangential x radial x longitudinal) were used as specimens. The physical properties evaluated were the basic density and linear shrinkage (tangential and radial contractions, and anisotropy coefficient), while the mechanical properties were represented through the Janka hardness test and compression parallel to the fibers. After 40 days of the biodeterioration test with Nasutitermes termites, changes in the equilibrium moisture content, retractability, water absorption rate and mechanical properties were evaluated. While the physical and mechanical properties evaluated showed values similar to those found in the literature, the deterioration caused by termites caused a reduction in hardness and parameters related to compression, increasing the dimensional instability of the wood, represented by the variation in the anisotropy coefficient. This made it possible to conclude that the biodeterioration resulting from the attack of termites directly affected the technological parameters of the wood, and consequently, its quality for the use in the purpose it could initially be destined.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"252-257"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43798669","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

Biofertilizer in the control of the nematode Pratylenchus brachyurus in sugarcane crop 生物肥料防治甘蔗短柱线虫的研究

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.23987

G. C. D. Silva, Anderli Divina Ferreira Rios, R. F. Silva, W. H. D. Buso, Denise Rodrigues Conceição, Rafaela Santos de Oliveira

{"title":"Biofertilizer in the control of the nematode Pratylenchus brachyurus in sugarcane crop","authors":"G. C. D. Silva, Anderli Divina Ferreira Rios, R. F. Silva, W. H. D. Buso, Denise Rodrigues Conceição, Rafaela Santos de Oliveira","doi":"10.18188/sap.v19i3.23987","DOIUrl":"https://doi.org/10.18188/sap.v19i3.23987","url":null,"abstract":"Biofertilizers can also be used as plague and disease control agents. The commercial product Microgeo ® is a biological biofertilizer rich in microorganisms. Few studies have been carried out to evaluate the interaction between biofertilizer and nematodes. The objective of this study was to evaluate the efficiency of the Microgeo ® biological fertilizer to control the nematode Pratylenchus brachyurus in two sugarcane cultivars. The work was carried out in greenhouse conditions with a completely randomized experimental design (DIC), in a triple factorial scheme (2 x 2 x 4), being two types of sugar cane (CTC 04 and CTC 9003), two types of management of the biofertilizer (Management 1: application of the biofertilizer and inoculation of the nematode at 0 days after transplanting (DAT), management 2: application of the biofertilizer and inoculation of the nematode in the roots of the plant 30 days later) and four doses of the liquid biofertilizer Microgeo ® (0 L ha -1 ; 150 L ha -1 ; 300 L ha -1 ; 450 L ha -1 ), with four replications. 800 specimens of P. brachyurus were inoculated in each experimental plot. The results showed that cultivating CTC 9003 during the conduct of the experiment showed greater susceptibility to the nematode compared to cultivating CTC 04. The biofertilizer Microgeo ® showed no curative or preventive effect on the control of the nematode under the conditions of the experiment.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"258-263"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43861078","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: 1

Rock powder and organic fertilization in soil cultivated with black bean 黑豆种植土壤中的石粉与有机肥

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.24537

Lenir Fátima Gotz, Felipe Piovesan, A. Castamann

{"title":"Rock powder and organic fertilization in soil cultivated with black bean","authors":"Lenir Fátima Gotz, Felipe Piovesan, A. Castamann","doi":"10.18188/sap.v19i3.24537","DOIUrl":"https://doi.org/10.18188/sap.v19i3.24537","url":null,"abstract":"The use of rock powder as a source of nutrients to plants can be an alternative or complement to mineral soluble and organic sources. Thus, the aim of this study was to evaluate the potential of different rock powder doses, associated or not with livestock manure, as a source of nutrients for bean and its effect on soil chemical attributes. The treatments consisted of the application of 0, 3, 6, 9 and 12 Mg ha -1 of rock powder, associated or not with livestock manure (17 Mg ha -1 ), applied on the soil surface, without incorporation. The experiment was carried out in completely randomized blocks, with three replicates, and in a factorial arrangement (5x2). The grain yield of bean, height plants and number of plants m -2 were not influenced by the treatments. On the other hand, the application of 3 Mg ha -1 of rock powder associated with livestock manure resulted in a higher number of grains per pod, and the increase in the rock powder doses affected the number of pods per plant. In the soil, only the manure application, regardless of the rock powder, resulted in effects: reduced potential acidity and potential cation exchange capacity, and increased phosphorus content and base saturation. Thus, rock powder, associated or not with livestock manure, is not effective in improving bean yield and soil chemical attributes after approximately three months of application, and the use of livestock manure, regardless of the rock powder doses, improves some chemical attributes in the soil.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"296-301"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47403774","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: 1

Productivity of tomato hybrids due to the application of calcium silicate 施用硅酸钙对番茄杂交种生产力的影响

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.24204

P. W. R. Coutinho, M. D. M. Echer, V. F. Guimarães, M. C. Lana, Thatiane Nepomuceno Alves, A. Inagaki

{"title":"Productivity of tomato hybrids due to the application of calcium silicate","authors":"P. W. R. Coutinho, M. D. M. Echer, V. F. Guimarães, M. C. Lana, Thatiane Nepomuceno Alves, A. Inagaki","doi":"10.18188/sap.v19i3.24204","DOIUrl":"https://doi.org/10.18188/sap.v19i3.24204","url":null,"abstract":"Silicon is a beneficial nutrient for the growth and production of many plant species, including tomatoes. The objective was to evaluate the influence of calcium silicate on the morphophysiological characteristics of tomatoes and the absorption of silicon, calcium, and magnesium. The experiment was conducted in a protected environment from August to December 2017, in a random block design, in a 2 x 5 factor scheme, with four repetitions. The first factor consisted of two hybrids (Ivety and Natalia) and the second factor by doses of calcium silicate (0, 150, 300, 450 and 600 kg ha -1 ). The fruits were evaluated for number of fruits per plant, longitudinal and transversal diameter, average fruit mass, commercial, noncommercial, and total productivity. The plants were evaluated for number of leaves, stem diameter, plant length, leaf area, membrane integrity damage, lignin content, stem and leaves dry mass, silicon accumulation and content, calcium, and magnesium contents in the leaves and in tomato fruits. The morphometric characteristics of Ivety and Natalia tomato hybrids were not altered by increasing doses of calcium silicate. The increased doses of calcium silicate influenced the non-commercial productivity of the tomato fruits, showing a reduction of this with the increased doses. Calcium silicate influenced differently in each hybrid, and it is worth noting that these results may vary in terms of genetic material and cultivation environment.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"243-251"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67541344","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

Phosphate fertilization and organic compost on the initial growth of sorghum in degraded soils 磷肥和有机堆肥对退化土壤中高粱初始生长的影响

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.24506

E. R. D. C. Cardoso, Francisco Nildo da Silva, Sandra Sely Silveira Maia, F. F. F. Hernandez, Rosemery Alesandra firmino dos Santos, Lailla Sabrina Queiroz Nazareno

{"title":"Phosphate fertilization and organic compost on the initial growth of sorghum in degraded soils","authors":"E. R. D. C. Cardoso, Francisco Nildo da Silva, Sandra Sely Silveira Maia, F. F. F. Hernandez, Rosemery Alesandra firmino dos Santos, Lailla Sabrina Queiroz Nazareno","doi":"10.18188/sap.v19i3.24506","DOIUrl":"https://doi.org/10.18188/sap.v19i3.24506","url":null,"abstract":"One of the strategies for the recovery of degraded soils is the planting of fast-growing forage species with high biomass production. In this sense, the objective of this research was to evaluate the initial growth of sorghum in degraded soils with organic fertilization and different phosphorus levels. A completely randomized design with a 4 x 3 x 2 factorial arrangement was used, with four soil types, three levels of phosphorus fertilization and two levels of organic fertilization. At 64 days after sowing the characteristics of the initial growth were analyzed: plant height, stem diameter, leaf number and fresh shoot mass. The height was measured by measuring the neck of the plant until the end of the newest fully expanded leaf, measured with the aid of a measuring tape and expressed in centimeters. The diameter of the stem, by means of a digital pachymeter. The application of phosphorus and organic matter in degraded soils is necessary for the initial development of sorghum plants, due to the low availability of this element, caused by the high adsorption of P in the soil colloids. Besides that, the lack of organic matter in the studied soils led to a decrease in the growth of sorghum, therefore, it is concluded that soil management in saline environments is necessary for the application of phosphorus and organic matter for a sustainable and technically viable production.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"289-295"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45027030","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

Development and productivity of two beet genotypes for fertilization 两种用于施肥的甜菜基因型的发育和产量

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.24070

D. M. Silveira, F. C. D. Carvalho, G. Mariano, André Luiz Oliveira de Francisco

{"title":"Development and productivity of two beet genotypes for fertilization","authors":"D. M. Silveira, F. C. D. Carvalho, G. Mariano, André Luiz Oliveira de Francisco","doi":"10.18188/sap.v19i3.24070","DOIUrl":"https://doi.org/10.18188/sap.v19i3.24070","url":null,"abstract":"Beet needs a high demand of nutrients to improve its development and productivity. The objective of this work was to evaluate the effect of fertilizer forms in the development and productivity of the beet crop. The experiment was carried out in the experimental area of the Fazenda Escola of the Higher Education Center of Campos Gerais, located in the city of Ponta Grossa-PR, between September and November 2018. The experimental design was randomized blocks in a 2x4 factorial scheme [2 genotypes of beet (Boron hybrid and Tall Top Early Wonder cultivar) x 4 forms of fertilization, T1 control (without fertilization), T2 poultry litter, T3 bovine manure and T4 NPK], containing four repetitions. The harvest was carried out at 75 days after transplanting the seedlings, harvesting five plants from each plot to carry out the analyzes, thus evaluating the number of leaves per plant, height of the aerial part, fresh mass of the aerial part and the root, productivity, horizontal diameter and commercial classification of root, presence of white rings through notes and soluble solids content (oBrix). Among the different genotypes studied, the cultivar Tall Top Early Wonder was superior in the variables of plant height, fresh mass of roots and leaves and soluble solids, 75 days after transplantation. The cultivar Tall Top Early Wonder responded better, implying the idea that organic fertilization would be an alternative as a source of nutrients in beet production.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"221-228"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43699376","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

Cotton response to nitrogen fertilization in the integrated crop-livestock system 农牧一体化系统中棉花对氮肥的响应

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.24349

F. Steiner, A. M. Zuffo, Kátia Cristina da Silva, Isabela Machado de Oliveira Lima, Hector José Valerio Ardon

{"title":"Cotton response to nitrogen fertilization in the integrated crop-livestock system","authors":"F. Steiner, A. M. Zuffo, Kátia Cristina da Silva, Isabela Machado de Oliveira Lima, Hector José Valerio Ardon","doi":"10.18188/sap.v19i3.24349","DOIUrl":"https://doi.org/10.18188/sap.v19i3.24349","url":null,"abstract":"Cotton has been widely cultivated in the Cerrado region, including the crop-livestock integration system under no-till. The objective of this study was to evaluate the effects of plant residues from ruzigrass [ Urochloa ruziziensis (R. Germ. & C.M. Evrard) Crins] and nitrogen fertilization on nitrogen use efficiency, growth, and yield of cotton crop ( Gossypium hirsutum L. R. latifolium Hutch.), cv. TMG 44 B2RF. The experimental design was randomized blocks, in a split plot scheme, with four replications. The plots consisted of three production systems: i) conventional cotton cropping in fallow area; ii) cotton cropping in the presence of straw from the shoots and roots of ruzigrass plants; iii) cotton cropping only in the presence of residues from the ruzigrass roots. The subplots consisted of five rates of N (0, 40, 80, 120 and 160 kg ha – 1 ), applied at 30 and 50 days after seedling emergence. The presence of ruzigrass straw provided less growth and development of cotton, in addition to less N uptake by plants. The cotton cropping in the crop-livestock integration system in the presence of residues from the roots and shoots of the ruzigrass plants resulted in the greater cotton yield in the second year, demonstrating the importance of the straw formation of the cover crops for the sandy soils of the Cerrado region. The optimal application rate of N in topdressing for the cropping of cotton in succession or not with ruzigrass residues in sandy soil varies from 100 to 110 kg N ha – 1 .","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"211-220"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43659269","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: 1

Adequacy of electrical conductivity test for lentil seeds 扁豆种子电导率试验的充分性

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.22566

Edvan Costa da Silva, Wagner Menechini, C. Galvão, Luís Augusto Batista de Oliveira, Natália Cássia de Faria Ferreira, Luciana Sabini da Silva

{"title":"Adequacy of electrical conductivity test for lentil seeds","authors":"Edvan Costa da Silva, Wagner Menechini, C. Galvão, Luís Augusto Batista de Oliveira, Natália Cássia de Faria Ferreira, Luciana Sabini da Silva","doi":"10.18188/sap.v19i3.22566","DOIUrl":"https://doi.org/10.18188/sap.v19i3.22566","url":null,"abstract":"The electrical conductivity test stands out among the existing physiological quality tests due to its simplicity of execution, repeatability, speed, easy interpretation of results, and low cost. This study aimed to establish a methodology for the test of electric conductivity in lentil seeds (Lens culinaris Medik), involving the seeds’ number of seeds and soaking time. The experiment was conducted at the Multidisciplinary Laboratory of the State University of Goiás, Campus Ipameri, in 2018. Lentil Silvina seeds were used, stored in the seed laboratory of the same institution. The experimental design used was completely randomized, in a 4x5 factorial scheme, with four seed lots (25, 50, 75, and 100 seeds) and five soaking times (3, 6, 9, 12, and 15 hours) at 25 oC, with four replications. The initial seed quality was characterized (water content, first counting of germination, percentage of germination, accelerated aging and 1000-seed weight). For the electrical conductivity test, four repetitions of 25, 50, 75, and 100 seeds each were used, weighed on a digital scale with an accuracy of 0.001 g and placed in plastic cups, with a capacity of 200 mL, containing 75 mL of distilled water. Then, the plastic cups remained in a BOD chamber, adjusted at 25 °C and the measuring was performed after 3, 6, 9, 12, and 15 hours of soaking in a conductivity meter (DIGIMED DM 31), the results being expressed in μS cm -1 g -1 . There was a significant interaction when evaluating the number of seeds per repetition and the soaking time. The use of replicates with 50 seeds subjected to 12 h of soaking shows the best results for the lentil seeds' electrical conductivity test.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"307-311"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48300838","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

Entomopathogenic fungi on the control of Sphenophorus levis in sugarcane crop 昆虫病原真菌防治甘蔗褐飞虱的研究

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.24426

Fernando Belezini Vinha, Luis Arnaldo de Assis Delfanti, V. Pagliarani, Vitor S Ferreira, A. Pinto

{"title":"Entomopathogenic fungi on the control of Sphenophorus levis in sugarcane crop","authors":"Fernando Belezini Vinha, Luis Arnaldo de Assis Delfanti, V. Pagliarani, Vitor S Ferreira, A. Pinto","doi":"10.18188/sap.v19i3.24426","DOIUrl":"https://doi.org/10.18188/sap.v19i3.24426","url":null,"abstract":"Brazil is the largest producer of sugarcane crop in the world,but its production can be highly affected by the pest Sphenophorus levis. The entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana can be used for the control of this pest, but are not always effective in the field, lacking information on application methods, doses and formulations. We evaluate the efficacy of M. anisopliae IBCB 425 and B.bassiana IBCB 66 in controlling S. levis and other soil pests at sugarcane crop. The bioassay was conducted in a split plot design, where each of the 4 treatments were repeated 5 times and distributed over an area of 5.000 m 2 . The treatments for both fungi consisted of: Wettable powder (WP) formulation 225 g conidia ha -1 , WP formulation 450 g conidia ha -1 , granule (GR) formulation 10 Kg ha -1 and Control (no fungal application). WP fungi formulations were applied to the ratoon with a tractor using a ratoon cutter and an pesticide applicator. The GR fungi formulation was manually applied on the ratoons. The evaluations were performed after 21, 60 and 100 days of fungi application. B. Bassiana fungus reduced the pest population but did not differ from the control, however for M. Anisopliae fungus there were significant differences between treatments on damaged stems. The fungus M. anisopliae was effective in controlling S. levis larvae and adults in the field and WP formulation had faster action than the GR, the dose of 225 g conidia ha -1 was enought to reduce S. levis population.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"280-288"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48736411","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

Stability of extruded diets for dogs 狗挤压饲料的稳定性

Scientia Agraria Paranaensis Pub Date : 2020-11-03 DOI: 10.18188/sap.v19i3.23949

D. C. D. Lima, T. S. Bastos, C. Souza, Juarez Ribeiro da Silva, S. Oliveira, A. Félix

{"title":"Stability of extruded diets for dogs","authors":"D. C. D. Lima, T. S. Bastos, C. Souza, Juarez Ribeiro da Silva, S. Oliveira, A. Félix","doi":"10.18188/sap.v19i3.23949","DOIUrl":"https://doi.org/10.18188/sap.v19i3.23949","url":null,"abstract":"Controlling the factors that influence the conservation of extruded dog foods can increase shelf life and/or guarantee the quality of shelf life of diets for these animals. Therefore, the objective was to evaluate the relationship among water activity (Aw), moisture (M), acidity, lipid peroxidation, crude protein (CP), ether extract (EE), and kibble size of extruded dog foods stored in sealed and open packages for 60 days (Experiment I). We also evaluated the stability of the Aw for up to 6.5 hours after coating with palatant (Experiment II). We manufactured four extruded dry dog foods: high CP and EE (HPE); low CP and EE (LPE); small kibble (SK); and large kibble (LK). In experiment I, the foods were stored in sealed 1 kg packages and 10 kg open packages, for a period of 60 days. We measured Aw, M, acidity, peroxide, CP, and EE of foods and the relative humidity (RH). Data were subjected to Pearson correlation analysis. For experiment II, samples were collected immediately after coating with palatant. Sub samples were collected every half hour to measure Aw. In experiment I, positive correlations were observed (P<0.05) among kibble size, M, and Aw; acidity, CP, EE, and M; and between Aw and RH, for open and sealed packages. There was also a positive correlation (P<0.05) for open packages among time, Aw, and peroxide. In experiment II, LK and LPE food presented Aw stabilized in less time. Diets with higher kibble size and high CP and EE levels are more unstable if kept in open packages. Extruded dry food with higher protein and lipid and smaller kibble size needs more time to stabilize its Aw.","PeriodicalId":30289,"journal":{"name":"Scientia Agraria Paranaensis","volume":"19 1","pages":"236-242"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42972824","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