Ciencia E Agrotecnologia最新文献_第7页

Nile tilapia nursery feeding management in a biofloc system 生物群落系统中的尼罗罗非鱼苗圃饲养管理

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246009422

B. C. Silva, Karolina Victória Rosa, Haluko Massago, R. L. Serafini, F. N. Vieira

{"title":"Nile tilapia nursery feeding management in a biofloc system","authors":"B. C. Silva, Karolina Victória Rosa, Haluko Massago, R. L. Serafini, F. N. Vieira","doi":"10.1590/1413-7054202246009422","DOIUrl":"https://doi.org/10.1590/1413-7054202246009422","url":null,"abstract":"ABSTRACT Nile tilapia (Oreochromis niloticus) has an opportunistic omnivorous feeding behavior and studies have demonstrated the consumption of microorganisms by the species from bioflocs, especially in the early phases of life. One may thus assume that when reared in biofloc systems, there may be a reduction in the feeding rates in the Nile tilapia nursery system when compared to the ponds. This study evaluated the effects of different feeding management options in Nile tilapia nurseries in a biofloc system. A total of 700 fingerlings (2.37 ± 0.55 g) were stocked in 20 experimental units (100 L) and inoculated with mature biofloc for the evaluation of five different feeding management options. After 49 days, it was observed that the higher feed rates caused an increase in nitrogen compounds and solids in the water, worsening the feed conversion rate. Furthermore, the excess feed supplied to the tilapia in the biofloc caused a reduction in the utilization of protein nitrogen, an increase in the liver and visceral fat, in addition to an increase in the production of solids and consumption of alkalinizer by fish biomass. On the other hand, low feeding rates cause a decrease in the growth and uniformity of the tilapia juveniles. Taking the results into consideration, it is recommended to use the feed management option proposed in treatment TC (26% below the highest feed rate) in the tilapia nursery in the biofloc system.","PeriodicalId":10188,"journal":{"name":"Ciencia E Agrotecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67203937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Ultrasound-assisted extraction of total carotenoids in papaya epicarp and its application in Frankfurt sausage 超声辅助提取木瓜外果皮总类胡萝卜素及其在法兰克福香肠中的应用

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246006722

L. E. Ordóñez-Santos, Viviana Andrea Velasco-Arango, J. I. Hleap-Zapata

{"title":"Ultrasound-assisted extraction of total carotenoids in papaya epicarp and its application in Frankfurt sausage","authors":"L. E. Ordóñez-Santos, Viviana Andrea Velasco-Arango, J. I. Hleap-Zapata","doi":"10.1590/1413-7054202246006722","DOIUrl":"https://doi.org/10.1590/1413-7054202246006722","url":null,"abstract":"ABSTRACT The agro-industrial processing of fruits generates a significant volume of by-products, which can be valued as a source of natural ingredients in the food industry. The objective of this research was to optimize the ultrasound-assisted extraction (UAE) of total carotenoids in papaya epicarp and to use the extract as an ingredient during the storage of the Frankfurter sausage. The maximum assisted extraction of total carotenoids (66.03 ± 0.60 mg of β-carotene/100g) in the papaya epicarp by ultrasound is achieved when working at temperatures of 30 °C, for 60 min and a solid-liquid ratio 0.0064 g/ml oil. The temperature presented the highest effect of extraction of total carotenoids, followed by solid-liquid ratio, and time in the UAE. Frankfurt-type sausages made from carotenoid lipid extract show a significant reduction in nitrites (p <0.05), a significant increase in oxidation processes (p <0.05) and achieve the preservation of their characteristic colors during storage. The carotenoid extracts obtained from the papaya epicarp can be a natural coloring additive in the production of Frankfurt-type sausages since it allows the preservation of color during storage.","PeriodicalId":10188,"journal":{"name":"Ciencia E Agrotecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67204007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of reforestation on soil and soil organic carbon losses 造林对土壤和土壤有机碳损失的影响

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246002622

G. Lense, T. C. Parreiras, Lucas Emanuel Servidoni, R. L. Mincato

{"title":"Impacts of reforestation on soil and soil organic carbon losses","authors":"G. Lense, T. C. Parreiras, Lucas Emanuel Servidoni, R. L. Mincato","doi":"10.1590/1413-7054202246002622","DOIUrl":"https://doi.org/10.1590/1413-7054202246002622","url":null,"abstract":"ABSTRACT Water erosion is a serious environmental problem that causes soil degradation, compromises its fertility and causes soil organic carbon (SOC) losses. Reforestation, encouraged by Brazilian environmental legislation, is a way to reduce water erosion. However, in tropical and subtropical regions, there is little information on the impact of reforestation on soil loss rates and SOC. Therefore, this study aimed to apply the Erosion Potential Method, combined with multitemporal data from soil samples collected in situ, to estimate and spatialize soil and SOC losses in a predominantly agricultural Brazilian watershed that showed high rates of reforestation in the period studied from 2011 to 2019. The determination of the EPM parameters was carried out with the aid of a Geographic Information System and the soil loss estimate was validated with information from a hydrosedimentological collection station. The results showed that between 2011 and 2019 water erosion was reduced by 27.5%, while carbon losses were reduced by 32.7%. Among the evaluated crops, corn showed the highest soil and SOC losses, while coffee and forest areas exhibited the lowest rates. Reforestation of the basin is the main factor responsible for the reduction of soil losses. This process was initiated seeking to meet the requirements of the Brazilian Forest Code, which highlights the positive role that public policies can play in environmental conservation when respected and well applied.","PeriodicalId":10188,"journal":{"name":"Ciencia E Agrotecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67203266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic effect of benzylaminopurine and meta-Topolin combination for micropropagation of gerbera ‘Pink Melody’ 苄氨基嘌呤与间topolin组合对非洲菊‘粉红旋律’微繁的协同效应

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246017521

Aaqib Shaheen, Y. Dewir, Mafatlal M. Kher, Majid Khan, A. El-Banna, Ahmed Alaizari

引用次数: 2

Insecticide activity of a peptidase inhibitor isolated from Anadenanthera macrocarpa seeds against Anagasta kuehniella 大石斛种子肽酶抑制剂对kuehniella的杀虫活性研究

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246006822

Welington de Araújo Leite, A. C. Jacobowski, M. L. Macedo

{"title":"Insecticide activity of a peptidase inhibitor isolated from Anadenanthera macrocarpa seeds against Anagasta kuehniella","authors":"Welington de Araújo Leite, A. C. Jacobowski, M. L. Macedo","doi":"10.1590/1413-7054202246006822","DOIUrl":"https://doi.org/10.1590/1413-7054202246006822","url":null,"abstract":"ABSTRACT Protease inhibitors (PIs) are a part of the plant defense system and reduce the proteolytic activity of the digestive enzymes of insect pests. The current study aimed to isolate and characterize an inhibitor of trypsin (AmTI) within the seed of Anadenanthera macrocarpa (Benth) (Leguminosae-Mimosoideae). Moreover, we tried to assess the defense mechanism of the larvae of Anagasta kuehniella against this inhibitor. Protein seed extracts were purified using Sephadex G-50 and trypsin-Sepharose columns. Electrophoresis revealed the molecular weight of the inhibitor to be 25 kDa. The stability evaluation demonstrated that the inhibitor was not denatured at temperatures of up to 60 °C, pH 2-10, and concentrations of up to 100 mM dithiothreitol for one hour. The inhibitor reacted in a 1:1 ratio with bovine trypsin with an inhibition constant [Ki] = 2.517 ´ 10-8. Incorporating the inhibitor in a 1 mg per 100 mg proportion of artificial diet offered to A. kuehniella larvae led to a significant difference in the weight and survival of larvae of the fourth instar compared to the control. AmTI acted on the enzymatic activities of trypsin and chymotrypsin, not allowing until the fourth larval instar, A. kuehniella, to create adaptations against the inhibitor, as it had a simultaneous effect on larval weight and mortality. Therefore, a new trypsin inhibitor showing inhibitory activity against the digestive enzymes trypsin and chymotrypsin from A. kuehniella was isolated, indicating that these activities are correlated with the deleterious effects of this insect.","PeriodicalId":10188,"journal":{"name":"Ciencia E Agrotecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67204078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genotypic variation of sugarcane for salinity tolerance: Morphological and physiological responses 甘蔗耐盐基因型变异:形态和生理反应

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246000122

Antonia Almeida da Silva, Zulma Catherine Cardenal Rubio, Paulo Cássio Alves Linhares, Ketlen Rocha e Silva, G. V. Pimentel, P. Marchiori

{"title":"Genotypic variation of sugarcane for salinity tolerance: Morphological and physiological responses","authors":"Antonia Almeida da Silva, Zulma Catherine Cardenal Rubio, Paulo Cássio Alves Linhares, Ketlen Rocha e Silva, G. V. Pimentel, P. Marchiori","doi":"10.1590/1413-7054202246000122","DOIUrl":"https://doi.org/10.1590/1413-7054202246000122","url":null,"abstract":"ABSTRACT Sugarcane (Saccharum spp.) is an important crop due to sugar, ethanol and bioenergy production. Its cultivation may occur in tropical regions exposed to high salinity. The aim was to identify cultivars tolerant to salinity to allow the cultivation of sugarcane (Saccharum spp.) in saline soils. To test the hypothesis that sugarcane show natural genotypic variation to salinity tolerance, we tested ten cultivars (SP80-3280, RB855453 RB966928, RB855156, SP80-1842, SP80-1816, RB928064, RB867515, RB92579, RB855536) and two sugarcane species: IM76-228 (S. robustum) and IN84-82 (S. spontaneum) under two concentrations of sodium chloride (NaCl): control (concentration found naturally in the soil used: electrical conductivity of 0.083 dS m-1) and soil enriched with NaCl: EC of 7.2 dS m-1. Biometry and photosynthesis traits were evaluated. The plants were collected and leaf (LDM), stem (SDM), root and total dry matter were used to estimate the tolerance index (TI). A cluster analysis was done to identify phenotypic dissimilarity. Three distinct groups regarding salinity tolerance on biomass-basis were formed. The cultivars RB855156, SP80-1842, SP80-1816 and species IM76-228 showed no reduction in LDM and SDM. Nonetheless, the cultivars SP80-3280, RB928064, RB92579 and species IN84-82 were impaired by salinity. The cultivar SP80-1816 showed the highest biomass accumulation and the highest TI. Therefore, we found a great genotypic variation regarding salinity tolerance in sugarcane, which can be explored by growers to cultivate in saline soils. Also can be used by the Sugarcane Breeding Programs to improve the salinity tolerance.","PeriodicalId":10188,"journal":{"name":"Ciencia E Agrotecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67202876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanoparticles and photodynamic therapy in the treatment and control of Alternaria alternata in wheat seeds 纳米粒子和光动力疗法在小麦种子互交锈病防治中的应用

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246005222

Lucas Couto Duarte, H. C. R. Catão, N. D. Tebaldi

{"title":"Nanoparticles and photodynamic therapy in the treatment and control of Alternaria alternata in wheat seeds","authors":"Lucas Couto Duarte, H. C. R. Catão, N. D. Tebaldi","doi":"10.1590/1413-7054202246005222","DOIUrl":"https://doi.org/10.1590/1413-7054202246005222","url":null,"abstract":"ABSTRACT The expansion of wheat crops (Triticum spp.) to the Brazilian Cerrado highlights the need to use pathogen-free seeds. This study aimed at evaluating the efficacy of nanoparticles (NPs) and photodynamic therapy (PhT) in inhibiting the in vitro growth of the fungus Alternaria alternata, in its treatment and control in naturally contaminated wheat seeds, and in the physiological quality of the seeds. The efficacy of NPs (ZnOCl, ZnOCl:1Cu, ZnOCl:0.1Ag; ZnO:1Cu, ZnO, and ZnO:1Ag) and PhT using methylene blue (MB) and toluidine blue (TB) dyes was evaluated in inhibiting the mycelial growth of A. alternata and in the treatment and control of the pathogen in wheat seeds by evaluating germination, emergence, GSI, ESI, accelerated ageing, and health. All NPs at 2.5 and 5 mg mL-1 concentrations and the dyes MB, TB, MB + TB at 50 and 100 µmol L-1 inhibited mycelial growth and reduced the incidence of A. alternata in the seeds. The NP ZnO:1Ag at 5 mg mL-1 and the MB + TB dye at 100 µmol L-1 were the most effective in inhibiting mycelial growth. NPs and PhT did not affect the physiological quality of seeds and controlled A. alternata in wheat seeds, demonstrating potential use in the treatment and control of the pathogen in wheat seeds.","PeriodicalId":10188,"journal":{"name":"Ciencia E Agrotecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67203466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Fruit biometry and physiological quality of Veitchia merrilli (Becc) H. E. Moore palm in relation to fruit maturation stage 梅花椰菜果实生物特征和生理品质与果实成熟期的关系

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246005622

A. M. Zuffo, A. M. D. Oliveira, L. M. Barrozo, R. Ratke, J. Aguilera, W. Fonseca

{"title":"Fruit biometry and physiological quality of Veitchia merrilli (Becc) H. E. Moore palm in relation to fruit maturation stage","authors":"A. M. Zuffo, A. M. D. Oliveira, L. M. Barrozo, R. Ratke, J. Aguilera, W. Fonseca","doi":"10.1590/1413-7054202246005622","DOIUrl":"https://doi.org/10.1590/1413-7054202246005622","url":null,"abstract":"ABSTRACT Veitchia merrilli (Becc) H. E. Moore is a palm tree widely used in gardening. Due to the continuous production of flowers on the inflorescences, there are fruits and seeds in various stages of maturation on the same plant, making it hard to determine the best fruit maturation stage for obtaining vigorous seeds. This study measured the biometric characteristics of the fruit at different stages of maturation and identified the best fruit maturation stage from which to obtain seeds with optimal physiological quality. Mature fruits were harvested from the tops of 10 trees and the ground, categorized according to their maturation stage and measured for overall length, equatorial diameter, and fresh weight. An experiment to identify the best fruit maturation stage for obtaining seeds of the V. merrilli with satisfactory physiological quality was carried out in a greenhouse, with five treatments (maturation stage) and ten replications; each plot was composed of 20 seeds. Plant height, root length, stem diameter, root and above ground dry weight, total dry weight, and Dickson’s quality index were measured. The green fruit stage is the most suitable for obtaining seeds of V. merrilli with the best physiological qualities. The fruits at the dark red maturity stage had the greatest length, while the those in the green transition stage had the greatest diameter and fresh weight.","PeriodicalId":10188,"journal":{"name":"Ciencia E Agrotecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67203518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Tilapia nursery stocking densities in a chemoautotrophic biofloc system 化学自养生物群落系统中罗非鱼苗圃放养密度

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246022321

B. C. Silva, Haluko Massago, J. I. Andrade, R. L. Serafini, A. Jatobá

{"title":"Tilapia nursery stocking densities in a chemoautotrophic biofloc system","authors":"B. C. Silva, Haluko Massago, J. I. Andrade, R. L. Serafini, A. Jatobá","doi":"10.1590/1413-7054202246022321","DOIUrl":"https://doi.org/10.1590/1413-7054202246022321","url":null,"abstract":"ABSTRACT The nursery phase in tilapia using biofloc technology is important as it increases the predictability of production. However, none studies evaluating the stocking densities of tilapia focused only on the use of an inorganic carbon source to promote the nitrification process as the main way to control nitrogen in the system. This study aimed to evaluate the effect of varied nursery stocking densities, in a chemoautotrophic biofloc system, on water quality, zootechnical parameters, and health of Nile tilapia (Oreochromis niloticus). Fifteen tanks (100 L capacity) containing heaters (28 ±1°C) inoculated with mature bioflocs were used. Seven hundred and fifty tilapia fingerlings (weighing 0.66 ±0.17 g) were distributed in the tanks, in triplicate, so that the densities in the tanks reached 200, 350, 500, 650, and 800 fish m-3. Dissolved oxygen and tilapia growth showed a negative linear relationship with fish density. A positive linear relationship with density was observed for nitrogen compounds, alkalinity, suspended solids, yield, and feed conversion. However, the water quality parameters were appropriate for tilapia and allowed good zootechnical performance irrespective of the fish density. Hematological parameters, fish survival, and uniformity in growth did not alter with densities. Total suspended solids produced by fish biomass showed a quadratic relationship with density, with the highest efficiency of the tanks stocked with 406 fish m-3. It is possible to construct a tilapia nursery in chemoautotrophic biofloc systems with densities reaching up to 800 fish m-3 and yield exceeding 12 kg m-3. But the density of 406 fish m-3 had a better efficiency in solid production by biomass.","PeriodicalId":10188,"journal":{"name":"Ciencia E Agrotecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67204216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Enhanced solubility of foliar fertilizer via spray dryer: Process analysis and productivity optimization by response surface methodology 喷雾干燥机提高叶面肥料的溶解度:响应面法的过程分析和生产率优化

IF 1.1 4区农林科学

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI: 10.1590/1413-7054202246002422

Leticia Alberto, Mário Sérgio da Luz, K. G. Santos, M. H. Okura

引用次数: 3