Engenharia na Agricultura最新文献_第7页

Thermal hydrolysis of olive leaves and stems to obtain fermentable sugars 热水解橄榄叶和茎以获得可发酵糖

Engenharia na Agricultura Pub Date : 2021-11-10 DOI: 10.13083/reveng.v29i1.12559

F. S. Rodrigues, N. M. Silveira, Alexandre Gonçalves Kury, Jefferson Fagundes Silva, Estêvão Santos Laureano Cunha, M. Tres, G. Zabot

{"title":"Thermal hydrolysis of olive leaves and stems to obtain fermentable sugars","authors":"F. S. Rodrigues, N. M. Silveira, Alexandre Gonçalves Kury, Jefferson Fagundes Silva, Estêvão Santos Laureano Cunha, M. Tres, G. Zabot","doi":"10.13083/reveng.v29i1.12559","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.12559","url":null,"abstract":"Subcritical water hydrolysis was used for the pre-treatment of residues generated in olive groves. Fermentable sugars were produced from the lignocellulosic material found in olive leaves and stems. Firstly, moisture, ash, particle average diameter, and total extracts were measured. Afterward, subcritical water hydrolysis was carried out at 20 MPa in a 50 mL reactor. The influences of two temperatures (180 and 220 °C) and two water flow rates (10 and 20 mL min-1) on the sugars yields were evaluated. The concentration of sugars was 31.3 g L-1 at 180 °C and 10 mL min-1 in a reaction for 3 min, of which glucose was the major sugar (27.64 g L-1). Statistical analysis was performed using Sisvar® 5.6 software and the averages were compared through Tukey’s test, considering a significance level of 95% (p<0.05). For the treatments evaluated in this work, only xylose was statistically different in the treatments with different water flow rates. The highest values of xylose were obtained with 10 mL min-1, which were 1.82 g L-1 (180 °C) and 2.18 g L-1 (220 °C). The total inhibitors were high at 220 °C for all water flow rates, with a significant difference from the averages obtained at 180 °C.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47734001","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

Growth promoters in banana seedlings submitted to saline irrigation 盐水灌溉香蕉幼苗的生长促进剂

Engenharia na Agricultura Pub Date : 2021-11-09 DOI: 10.13083/reveng.v29i1.12500

Daniel da Silva, R. Bastos, C. D. F. B. D. Silva, A. B. O. D. Sousa

{"title":"Growth promoters in banana seedlings submitted to saline irrigation","authors":"Daniel da Silva, R. Bastos, C. D. F. B. D. Silva, A. B. O. D. Sousa","doi":"10.13083/reveng.v29i1.12500","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.12500","url":null,"abstract":"The objective of this study was to evaluate the effect of inoculation of a plant growth promoter bacteria on the growth of micropropagated banana seedlings cultivar Williams under irrigation with water at different saline levels. The experiment was carried out in a greenhouse at Embrapa Agroindústria Tropical, Fortaleza, State of Ceará. The experimental design was in randomized blocks, in a 3 x 4 factorial scheme, corresponding to the three factors for growth promotion (negative control: water; Osmocote® slow-release fertilizer and a Bacillus spp. bacterium) subjected to four levels of irrigation water salinity (S1 = 0.5; S2 = 1.5; S3 = 3.0 and S4 = 4.5 dS m-1), and five blocks, totaling 60 experimental units. Sixty days after transplanting (DAT) and application of treatments, the following variables related to plant growth were measured: number of leaves (NL), pseudostem diameter (PD), plant height (PH), leaf area (LA), and root length (RL). The rise in saline levels in the irrigation water negatively influenced the variables number of leaves, pseudostem diameter, root length, and leaf area, showing a decreasing linear behavior. The variables number of leaves and leaf area of seedlings inoculated in association with Bacillus spp. did not differ from each other, regardless of the saline level. This indicated a likely increase in the response to the salinity tolerance of the seedlings. Treatment with Osmocote® fertilizer differed statistically for variables plant height, pseudostem diameter, and leaf area.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42554438","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

Temporal distribution of rainfall in the Far West region of Santa Catarina, Brazil 巴西圣卡塔琳娜州远西部地区降雨的时间分布

Engenharia na Agricultura Pub Date : 2021-11-05 DOI: 10.13083/reveng.v29i1.12401

Á. J. Back

引用次数: 0

Climatological water balance and climate classification of thornthwaite and mather for benin, west Africa, in 1970-2015 period 1970-2015年西非贝宁thornthwaite和mather气候水平衡与气候分类

Engenharia na Agricultura Pub Date : 2021-10-29 DOI: 10.13083/reveng.v29i1.12387

Vidéhouénou Ariane Lucrèce Todote, G. Lyra, M. Abreu

{"title":"Climatological water balance and climate classification of thornthwaite and mather for benin, west Africa, in 1970-2015 period","authors":"Vidéhouénou Ariane Lucrèce Todote, G. Lyra, M. Abreu","doi":"10.13083/reveng.v29i1.12387","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.12387","url":null,"abstract":"The climate is described by the predominant atmospheric conditions in a particular region and influences several human activities. In agriculture, water availability defines the growth and yield of crops and can be obtained by the water balance. The climate classification also aids to identify suitable areas for agricultural crops. Thus, the aim of this work was to elaborate the water balance and perform the climate classification through the method of Thornthwaite and Mather (1955) for six weather stations (Bohicon, Cotonou-Airport, Kandi-Airport, Natitingou, Parakou-Airport and Savè) located in Benin, Western Africa. For the execution of this work, monthly series of precipitation and potential evapotranspiration from 1970 to 2015 were used. Once the monthly water balance of the six seasons was elaborated, it was observed that the rainy (dry) period decreases (increases) from the coast (Cotonou-Airport) to the north of Benin (Kandi-Airport) and, coincides with Boreal summer and part of autumn (Boreal winter and part of spring). Regarding the climate classification, the Cotonou-Airport station was characterized as Subhumid Megathermal climate with moderate winter deficit (C2wA’a’); the stations of Bohicon and Savè presented similar climate classification with Subhumid Dry Megathermal climate with low or without water surplus (C1dA’a’); Natitingou with Subhumid Dry climate Megathermal with large summer surplus (C1s2A’a’); Parakou-Airport with Subhumid climate Dry Megathermic with moderate summer surplus (C1sA’a’) and, Kandi-Airport presented Semi-arid Megathermal climate with moderate summer surplus (DsA’a’). In Benin, subsistence and rainfed farming showed greater risk in the north of the country due to the decrease in the rainy season and the water surplus from the coast (south) to the north of the country, with the increase in aridity.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44417666","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

Performance of two parallel covered lagoon digesters in the treatment of pig farm wastewaters 两个平行覆盖的泻湖消化池处理养猪场废水的性能

Engenharia na Agricultura Pub Date : 2021-10-21 DOI: 10.13083/reveng.v29i1.11576

A. Almeida, A. P. Rosa, I. Sousa, J. Lopes, S. Melo, A. Borges

引用次数: 0

Production, chemical components, and content of bioactive compounds of strawberry cultivars 草莓品种的生产、化学成分及生物活性物质含量

Engenharia na Agricultura Pub Date : 2021-10-21 DOI: 10.13083/reveng.v29i1.10883

Sarah Fiorelli de Carvalho, Ana Paula Antunes Corrêa, L. V. Ferreira, M. Vizzotto, L. Antunes

{"title":"Production, chemical components, and content of bioactive compounds of strawberry cultivars","authors":"Sarah Fiorelli de Carvalho, Ana Paula Antunes Corrêa, L. V. Ferreira, M. Vizzotto, L. Antunes","doi":"10.13083/reveng.v29i1.10883","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.10883","url":null,"abstract":"There are only a few strawberry cultivars available in Brazil and all are imported from North America and Europe. Thus, the introduction of new materials and their evaluation under Brazilian environmental conditions is imperative. The objective of this study was to evaluate the production, chemical components, and concentration of bioactive compounds in strawberry cultivars under edaphoclimatic conditions in the municipality of Pelotas-RS. The experiment was conducted in the field with low tunnels in 2011 and 2012. The experiment in the field was arranged in a completely randomized design, with eight treatments (cultivars), four replications. Each plot consisted of nine plants. The experiment in laboratory was arranged in a completely randomized 8x3 factorial design (8 cultivars and 3 months of harvest) and 4 replications. The variables analyzed were fruit number and fruit mass per plant, production, yield, soluble solid content, titratable acidity, ascorbic acid, anthocyanins, phenolic compounds, and antioxidant activity. Cultivar and harvest month influenced acidity, and the contents of soluble solids, ascorbic acid, and bioactive compounds. Cultivar Camarosa showed higher production, and higher contents of anthocyanin, phenolic compounds, and soluble solids. Cultivars ‘Palomar and ‘Aromas’ stand out for the content of ascorbic acid.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42992629","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

Passion fruit production under different swine wastewater doses treated in a biodigester 不同猪废水在沼气池处理下的百香果产量

Engenharia na Agricultura Pub Date : 2021-10-02 DOI: 10.13083/reveng.v29i1.11123

Manuel Antonio Navarro Vásquez, Ana Maria Silva dos Santos, Danilo Francisco de Oliveira, Edilza Maria Felipe Vásquez, F. Santos, Francisco Rondynelle Rodrigues Sousa

{"title":"Passion fruit production under different swine wastewater doses treated in a biodigester","authors":"Manuel Antonio Navarro Vásquez, Ana Maria Silva dos Santos, Danilo Francisco de Oliveira, Edilza Maria Felipe Vásquez, F. Santos, Francisco Rondynelle Rodrigues Sousa","doi":"10.13083/reveng.v29i1.11123","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.11123","url":null,"abstract":"Soil fertilization using materials of animal origin, such as biofertilizers, is an important practice to maintain productive soil, as they provide beneficial effects on soil physical, chemical, and biological properties. This study aimed to evaluate the number of fruits, fruit mass, and yield of yellow passion fruits in the first year of cultivation with the application of swine wastewater (SW) treated in a biodigester. The experiment was set up at the experimental area belonging to IFCE Crato, CE, Brazil, with a spacing of 5.0 m between plants and 3.0 m between rows, using the espalier system of training and drip irrigation. The experiment was conducted in a randomized block design, with five treatments and four replications. Treatments consisted of five SW doses (D1 = 0, D2 = 0.50, D3 = 1.00, D4 = 1.50, and D5 = 2.00 L plant?1) applied at two phenological stages of the crop. The results were subjected to analysis of variance at a 5% significance, followed by the regression test. The increased SW doses influenced all the studied variables, following the linear and quadratic regression models, except for the mean fresh fruit mass. The highest yield was achieved with the highest studied dose, being an interesting alternative for recommendation to farmers in the region.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44671376","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

Spatial variability of chlorophyll content in a Tifton 85 bermudagrass pasture in a tropical region 热带地区蒂夫顿85型百慕大草甸草地叶绿素含量的空间变异

Engenharia na Agricultura Pub Date : 2021-09-28 DOI: 10.13083/reveng.v29i1.12556

João Luiz Jacintho, G. Ferraz, B. Barbosa, P. Ferraz, S. Santos

引用次数: 0

Production of eucalyptus seedlings using alternative substrates 利用替代基质生产桉树幼苗

Engenharia na Agricultura Pub Date : 2021-09-22 DOI: 10.13083/reveng.v29i1.11236

P. Ferreira, V. Barretto, R. Montagnolli, P. R. M. Lopes

{"title":"Production of eucalyptus seedlings using alternative substrates","authors":"P. Ferreira, V. Barretto, R. Montagnolli, P. R. M. Lopes","doi":"10.13083/reveng.v29i1.11236","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.11236","url":null,"abstract":"The efficiency of forest species production is associated with the seedlings quality. Hence, the substrate used is a determining factor in crop productivity, such as eucalyptus. Thus, the physical and chemical parameters of alternative and sustainable substrates were evaluated using coconut fiber and vermicompost in the production of Corymbia citriodora seedlings. Plants performance and quality were also evaluated by determining plant biomass and Dickson’s quality index, with or without mineral supplementation during cultivation. Results revealed that the proposed substrates obtained good physical and chemical characteristics when compared to a commercial substrate. The fertilization of seedlings showed to be essential in the production of more vigorous and better quality plants. The best quality C. citriodora seedlings was produced in the commercial substrate. However, it is worth highlighting the seedlings performance using alternative substrates such as coconut fiber and vermicompost, which represent a great potential for improvement, mainly due to its low cost and the observed result regarding the possible availability of nutrients in a gradual and constant way during the plants development.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42995193","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

Water stress in passion fruit cropping: an approach to its development 百香果种植中的水分胁迫:一种发展途径

Engenharia na Agricultura Pub Date : 2021-09-22 DOI: 10.13083/reveng.v29i1.11610

Leandro Aparecido Fogagnoli Contiero, José Carlos Cavichioli, Lucas Aparecido Manzani Lisboa, Rodrigo Aparecido Vitorino, Samuel Bispo Ramos, Paulo Alexandre Monteiro de Figueiredo

{"title":"Water stress in passion fruit cropping: an approach to its development","authors":"Leandro Aparecido Fogagnoli Contiero, José Carlos Cavichioli, Lucas Aparecido Manzani Lisboa, Rodrigo Aparecido Vitorino, Samuel Bispo Ramos, Paulo Alexandre Monteiro de Figueiredo","doi":"10.13083/reveng.v29i1.11610","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.11610","url":null,"abstract":"In places with water restrictions, there is the occurrence of water stress, which compromises the entire cycle of passion fruit crop, causing damage to the vegetative and reproductive phase of the plant. Therefore, the objective of this work was to assess water stress in the passion fruit crop through an approach to its development. An experiment was carried out in May 2019 at São Paulo State University (Unesp), College of Agricultural and Technological Sciences located in the municipality of Dracena, State of São Paulo. The experimental design was completely randomized (DIC), in a 3x3 factorial arrangement, in which three passion fruit species were used: Passiflora gibertii; Passiflora foetida, and Passiflora edulis, interacting with three irrigation intervals, namely: 4, 8, and 12 days, with four replications, totaling 36 plots. It was found that the a 12-day interruption in the irrigation affects the growth of seedlings of different species of passion fruit, and the species P. gibertii has a growth rate higher than P. edulis and P. foetida. The species P. edulis showed lower contents of chlorophylls A, B, and total in relation to P. gibertii and P. foetida.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45452290","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