REVISTA AGRO@MBIENTE ON-LINE最新文献_第9页

Estimates and causes of fresh fruit post-harvest losses in the Chapadinha Microregion, Maranhão, Brazil 巴西maranh<e:1> Chapadinha小区新鲜水果收获后损失的估计和原因

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-12-30 DOI: 10.18227/1982-8470ragro.v12i4.5223

Luana Ribeiro Silva, E. Almeida, L. S. Ferreira, Késsia Tenório Figueirinha, Antonio Gabriel da Costa Ferreira, Washington da Silva Sousa

{"title":"Estimates and causes of fresh fruit post-harvest losses in the Chapadinha Microregion, Maranhão, Brazil","authors":"Luana Ribeiro Silva, E. Almeida, L. S. Ferreira, Késsia Tenório Figueirinha, Antonio Gabriel da Costa Ferreira, Washington da Silva Sousa","doi":"10.18227/1982-8470ragro.v12i4.5223","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v12i4.5223","url":null,"abstract":"Fruit growing contributes to Brazilian socioeconomic growth, both as a source of food for the \u0000population and in the generation of employment and income. However, the production chain incurs significant \u0000negative impacts, mainly due to post-harvest losses. The objective of the current study was to estimate the \u0000post-harvest losses of fruits, occurring in the retail markets of Anapurus, Belágua, Mata Roma, São Benedito \u0000do Rio Preto and Urbano Santos (Maranhão State). The study was carried out with visits to 45 commercial \u0000establishments, and the deployment of a questionnaire regarding post-harvest losses of 12 fruits. It is \u0000concluded that, in decreasing order, losses were: avocado (11.76 ± 0.09%) > papaya (11.65% ± 0.02) > \u0000banana (10.82 ± 1.75%) > grape (10.08 ± 0.06%) > passion fruit (9.28 ± 0.04%) > pineapple (8.62 ± 0.04%) \u0000> watermelon (8.48 ± 0.05%) > mango (8.00 ± 0.18%) > orange (7.12 ± 0.10%) > apple (6.68 ± 0.07%) > pear \u0000(6.52 ± 0.03%) > melon (4.32 ± 0.01%). Physiological disorders were the main cause of losses, with estimated \u0000losses being up to 10.62%. It is suggested that losses could be reduced with: better hygiene in commercial \u0000environments, effective planning of the quantities offered, and the adoption of low cost technologies for the \u0000conservation and refrigeration of temperate fruits. Some public initiatives, such as the increase in availability of \u0000training courses, improvement of roads in the rural areas of the Chapadinha Microregion, and encouragement \u0000of the expansion of fruit growing in Maranhão, may lead to improvements, with direct benefits to society in \u0000general.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117060016","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: 4

Sources of black aphid resistance in the cowpea 豇豆抗黑蚜的来源

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-12-30 DOI: 10.18227/1982-8470RAGRO.V12I4.5120

V. R. Lourenço, A. M. D. Sousa, Antonia Débora Camila de Lima Ferreira, E. Bleicher, C. D. M. Bertini

{"title":"Sources of black aphid resistance in the cowpea","authors":"V. R. Lourenço, A. M. D. Sousa, Antonia Débora Camila de Lima Ferreira, E. Bleicher, C. D. M. Bertini","doi":"10.18227/1982-8470RAGRO.V12I4.5120","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I4.5120","url":null,"abstract":"For a variety of agronomic reasons, landraces have strategic importance for cowpea Vigna \u0000unguiculata (L.) Walp. genetic breeding programs. The aim of the current research was to identify black \u0000aphid, Aphis craccivora Koch resistance in cowpea landraces. Twenty-three landraces from different regions \u0000of the state of Ceará, Brazil, were compared to four literature-cited standards: BRS Guariba and TVu 408 \u0000P2 (resistant); BR 17-Gurguéia and VITA 7 (susceptible). Experiments were conducted in a greenhouse \u0000located at Campus do Pici, Universidade Federal do Ceará, in Fortaleza, Ceará state, Brazil. A completely \u0000randomized block design was used, with six replicates, each composed of one plant in a 300 mL pot. Plants \u0000were individually infested with five six-day-old adult insects. Adults were subsequently evaluated two days \u0000after infestation and nymphs at four days. Six landraces were highly resistant (Um-named 1-DIP, Feijão de \u0000arrancada, Feijão moitinha, Feijão de moita, Cara preta and Roxim miúdo) to levels compatible to the BRS \u0000Guariba standard. Three other landraces (Feijão da Bahia, Cojó and Feijão da Consuelo Rocha) showed \u0000moderate resistance, similar to the TVu 408 P2 standard. In addition to the high genetic variability found in the \u0000landraces, antibiosis was the main resistance mechanism observed.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"416 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122794038","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

GGE biplot for stability and adaptability in cashew tree clones 腰果树无性系稳定性和适应性的GGE双图

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-10-29 DOI: 10.18227/1982-8470RAGRO.V12I3.4887

G. K. Yokomizo, Francisco das Chagas Vidal Neto, Kuang Hongyu, L. M. Barros

{"title":"GGE biplot for stability and adaptability in cashew tree clones","authors":"G. K. Yokomizo, Francisco das Chagas Vidal Neto, Kuang Hongyu, L. M. Barros","doi":"10.18227/1982-8470RAGRO.V12I3.4887","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I3.4887","url":null,"abstract":"The interaction genotype versus environment makes it difficult the genetic improvement of the species for the selection of more adapted and stable genotypes. Thus, the objective of this work was to evaluate new clones of early dwarf cashews, in terms of stability and adaptability, employing the GGE biplot methodology. \u0000The experimental design was based on randomized blocks with four replications and 15 treatments (different \u0000clones). The variables evaluated were cashew production per plant (PCP), average mass of chashew (MMC) \u0000and early harvest (PRE). The clones G1 and G3 for MMC, G15, G2, G14 and G8 for PRE and G3, G10 and G2 \u0000for PCP approached the ideotype; the clones identified as top for each characteristic were not coincident; the \u0000majority of the clones were stable for MMC, while for PRE and PCP were not stable; the clone G4 had the best \u0000average in PRE, but with low stability; in the GGE biplot the environments A3 for MMC, A4 to PRE and A5 for \u0000PCP were the most discriminating; all environments had greater contribution in the differentiation of clones in \u0000PRE and MMC, for PCP were the environments A4 and A5; in relation at the average representativeness the \u0000environments A1 in MMC and A2 for PRE and PCP stood out.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127847324","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

Origin and post-harvest losses of vegetables in the microregion of Chapadinha, Maranhão, Brazil 巴西maranh<e:1> Chapadinha微区蔬菜的来源和收获后损失

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-10-29 DOI: 10.18227/1982-8470RAGRO.V12I3.5026

Tiago Fernando Riew Tomm, E. Almeida, Késsia Tenório Figueirinha, L. S. Ferreira, Márcia Maria de Souza Gondim, D. J. Amorim

{"title":"Origin and post-harvest losses of vegetables in the microregion of Chapadinha, Maranhão, Brazil","authors":"Tiago Fernando Riew Tomm, E. Almeida, Késsia Tenório Figueirinha, L. S. Ferreira, Márcia Maria de Souza Gondim, D. J. Amorim","doi":"10.18227/1982-8470RAGRO.V12I3.5026","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I3.5026","url":null,"abstract":"Research involving estimation of post-harvest losses of vegetables is limited in the state of Maranhão \u0000(MA), however, they are essential to identify of causes of losses, as well as for reducing them. The objective of \u0000the current study was to describe the cultivation and post-harvest losses of vegetables in the municipalities of \u0000Anapuru, Belágua, Chapadinha, Mata Roma, São Benedito and Urbano Santos, state of Maranhão, northern \u0000Brazil. The information was obtained by questionnaires given to the traders from the main vegetable trading \u0000centres for each municipality. The questions covered the socioeconomic aspects of handling, transportation, \u0000storage and commercialization of vegetables. While many traders had a full secondary education (37%), \u0000they have little technical knowledge of production, management (83%) and marketing (82%) of vegetables. \u0000Cultivation is carried out mainly in greenhouses (77%), with many vegetables coming from other states (89%), \u0000such as Ceará, via asphalted roads (100%). Physiological disorders, such as rapid maturation, wilting and \u0000budding, were the main causes of loss. Rank losses, in order of decreasing losses were: tomato (18.38 ± \u00000.39%) > potato (13.82 ± 0.11%) > bell pepper (10.13 ± 0.07%) > carrot (9.35 ± 0), 09%) > onion (7.31 ± \u00000.15%) > lettuce (6.16 ± 0.15%). The losses were significant and there is a clear need for training on good \u0000post-harvest practices, effective management of the quantity offered, and government incentives to expand \u0000the olericulture in the Chapadinha microregion.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128831646","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: 5

Water loss in transit in an intermittent river in brazilian semi-arid 巴西半干旱地区一条间歇河流的运输失水

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-10-29 DOI: 10.18227/1982-8470RAGRO.V12I3.5090

C. Toledo, Emanuelly de Moura Silva Almeida, Alexandre Vicente Lopes Neto, T. L. R. Silva, Filipe Augusto Rodrigues Santos

{"title":"Water loss in transit in an intermittent river in brazilian semi-arid","authors":"C. Toledo, Emanuelly de Moura Silva Almeida, Alexandre Vicente Lopes Neto, T. L. R. Silva, Filipe Augusto Rodrigues Santos","doi":"10.18227/1982-8470RAGRO.V12I3.5090","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I3.5090","url":null,"abstract":"Riverwater often comes into contact with the underground flow in aquifers. When this contact \u0000occurs, the river and aquifer are considered to be hydraulically connected. In recent decades, there has \u0000been great interest in trying to to improve understanding of the interactions occuring between superficial and \u0000subterranean water systems. A variety of analytical solutions have been proposed to describe the interaction of \u0000confined and free aquifers with adjacent rivers, including the quantification of the decrease of river flow along \u0000its course. The objective of the current study was to calibrate and validate a loss-in-transit flow model for rivers, \u0000and to evaluate the minimum flow that still permits connectivity between water sources in the Alto Jaguaribe \u0000basin. The methodology used was based on the equation of continuity and mass balance along the study river. \u0000A modified Araújo and Ribeiro equation showed strong applicability to loss-in-transit generation, with a mean \u0000loss in transit of 3.6% km-1, and a Nash and Sutcliffe Efficiency value of 0.29. On the other hand, the classbased \u0000loss of upstream flow generated 4 classes with a mean of 2.6% km-1 and showed great improvement, \u0000reaching an NSE of 0.74 - high efficiency. Minimum flows were below the regular flow recorded by the Ceará \u0000Secretariat of Water Resources, showing that the ability exists in the region hydrological connectivity between \u0000reservoirs in the Alto Jaguaribe basin and for alluvial aquifers to be recharged.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131763671","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: 2

Productive performance and economic evaluation of tambaqui roelo in excavated fishponds, Manaus, Brazil 巴西马瑙斯挖掘鱼池中坦巴基罗鱼的生产性能和经济评价

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-10-29 DOI: 10.18227/1982-8470RAGRO.V12I3.4895

J. I. Costa, A. L. Gomes, G. Bernardino, O. J. Sabbag, M. I. Martins

{"title":"Productive performance and economic evaluation of tambaqui roelo in excavated fishponds, Manaus, Brazil","authors":"J. I. Costa, A. L. Gomes, G. Bernardino, O. J. Sabbag, M. I. Martins","doi":"10.18227/1982-8470RAGRO.V12I3.4895","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I3.4895","url":null,"abstract":"Tambaqui is the most widely-cultivated native fish species in Brazil. Although most production \u0000occurs in fish ponds, the species is also raised resevoirs, stream channels and net tanks. Despite its high \u0000yield and productive potential, cultivation of this species is not always economically viable. Consequently, the \u0000current study aimed to provide a technical and economic evaluation of tambaqui (Colossoma macropomum) \u0000production in the metropolitan region of Manaus. Eight projects were selected and, through a semi-structured \u0000questionnaire, production phases, production cycles, management adopted, infrastructure used, productive \u0000indexes and fiscal investment were analysed. Together this allowed total operational cost (TCO) and profitability \u0000indicators to be calculated. Stocking density used influenced apparent feed conversion, specific growth \u0000rate and final mean weight. Feed was the key item in the TOC, comprising 69.63%, followed by labor and \u0000depreciation. Producers sell to: cold-store companies (R$ 4.10 kg-1), markets (R$ 7.30 kg-1), direct consumers \u0000(R$ 10.00 kg-1), supermarkets (R$ 6.20 kg-1) and intermediates (R$ 5.50 kg-1). In general, the production of \u0000tambaqui proved to be fiscally viable, with a profitability index higher than 20%, and success being strongly \u0000related to the marketing channel used, sale price and price of feed.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123196826","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

Initial growth of cassava plants cv. Mossoró under different water regimes 木薯植株的初始生长。Mossoró在不同的水状态下

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-10-29 DOI: 10.18227/1982-8470RAGRO.V12I3.5155

Domingos F M Neto, D. G. Coelho, M. T. Andrade, J.L.D. Alves

{"title":"Initial growth of cassava plants cv. Mossoró under different water regimes","authors":"Domingos F M Neto, D. G. Coelho, M. T. Andrade, J.L.D. Alves","doi":"10.18227/1982-8470RAGRO.V12I3.5155","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I3.5155","url":null,"abstract":"The sprouting phase of cassava is critical for the establishment of the plant, with this phase \u0000being dependent on soil moisture. As such, this study evaluated the effect of different irrigation levels on \u0000the initial growth of cassava cv. Mossoró in semi-arid conditions. The experiment was conducted under \u0000completely randomized design conditions with 5 replications. The treatments in pots containing one plant per \u0000experimental unit consisted of 5 irrigation levels, 0, 25, 50, 75 and 100% of the reference evapotranspiration \u0000(ETo, mm day-1), which corresponded to totals for the experimental period of 11.20; 42.15; 73.09; 104.03 \u0000and 134.97 mm, respectively. At 30 days after planting, the number of leaves and stems, as well as the \u0000dry mass of the shoot and the root had increased sharply for irrigation levels up to 73.09 mm. For higher \u0000irrigation levels there was a tendency for plant growth stabilization; however, above 104.03 mm there was \u0000a decrease. Shoot and root dry mass ratio showed severe water stress at the 11.20 mm level, being more \u0000damaging to root growth. Plant height showed a positive linear trend as the level of irrigation was increased, \u0000as opposed to water use efficiency. Therefore, irrigation with 50% replacement of ETo (73.09 mm) provided \u0000the best conditions for early growth of cassava.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132670776","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: 3

Bees (Hymenoptera: Apidae) injurious to grapes in the semiarid region of Rio Grande do Norte state, Brazil 蜜蜂(膜翅目:蜜蜂科)对巴西北里奥格兰德州半干旱地区的葡萄有害

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-06-30 DOI: 10.18227/1982-8470RAGRO.V12I2.4750

J. B. C. Soares, E. M. Costa, E. Araujo

{"title":"Bees (Hymenoptera: Apidae) injurious to grapes in the semiarid region of Rio Grande do Norte state, Brazil","authors":"J. B. C. Soares, E. M. Costa, E. Araujo","doi":"10.18227/1982-8470RAGRO.V12I2.4750","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I2.4750","url":null,"abstract":"Commercial cultivation of grapes (Vitis sp.) is expanding in the semi-arid region of Rio Grande do Norte (RN) state, Brazil. However, one of the key aspects for successful grapevine cultivation is a knowledge of the pests affecting the crop, especially in regions where cultivation is recent and in the initial phase of \u0000expansion. Consequently, the study objective was to conduct the first-ever study of damage by bees to grapes in the semi-arid state of Rio Grande do Norte, and to quantify the losses caused by the attack. The study occurred in a vinyard planted with ‘Itália’ and ‘Isabel’ varieties, located in a semiarid region of RN, in the Mossoró municipality. Studies quantifying damage occurred in the dry season (August - September 2014) and rainy season (February - March 2015). The bees Apis mellifera L. (Hymenoptera: Apidae) and Trigona spinipes Fabricius (Hymenoptera: Apidae) were observed to cause damage to bunches of grapes only during \u0000the dry period of the year. The bees caused significant losses in the ‘Isabel’ and ‘Italia’ varieties, with 75.94 and 72.11% of bunches having more than 5% of grapes damaged, respectively.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130631404","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

Response of crisp lettuce (Lactuca sativa L.) to organic and inorganic sources of fertilization 脆生菜对有机和无机施肥的响应

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-06-30 DOI: 10.18227/1982-8470RAGRO.V12I2.4885

Alessandra Algeri, Oscar Otávio Frihling, Lianara Segalin Lettrari, Elaine de Jesus Rodrigues, A. V. Luchese, A. J. Sato

{"title":"Response of crisp lettuce (Lactuca sativa L.) to organic and inorganic sources of fertilization","authors":"Alessandra Algeri, Oscar Otávio Frihling, Lianara Segalin Lettrari, Elaine de Jesus Rodrigues, A. V. Luchese, A. J. Sato","doi":"10.18227/1982-8470RAGRO.V12I2.4885","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I2.4885","url":null,"abstract":"The use of organic products to promote plant growth is becoming ever-more important as the paradigm of sustainable production of foodstuffs becomes increasingly common. Accordingly, the objective of the current study was to evaluate the response of lettuce to organic and inorganic sources of nutrients in soils representative of those found in Parana State, Brazil, across successive cultivations. Experimental methodology involved randomized blocks, with5 repetitions. Treatments used were: 1- control (Test);2-100% mineral fertilizer (MF); 3- 100% chicken litter (CL); 4- 100% liquid pig manure (LMP); 5- 50:50 mixture of CL and MF (CL+MF); 6- 50:50 mixture of LMP and MF (LMP+MF) and 7- 50% CA + 50% (CL+LMP). Experimental plot size was 0.7 m², and young Verônica cultivar individuals were planted with a 0.30 x 0.30 m spacing. There were two experimental plantings: in the first, the first using the treatments described above; the second, investigated the residual effect of fertilization of the first planting. For the first cropping, highest wet (326.5 and 315.4 g plant-1)and dry (14.2 and 19.74 g plant-1) above ground biomasses, were obtained with the LMP +MF and CL+MF treatments. No significant differences were encountered for the treatments in the second harvest. The effect of mineral fertilization in the production of Veronica cultivar lettuce, is greatest when it is combined with organic fertilization such as chicken litter (CL) or liquid pig manure (LMP).","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129749756","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

Desorption isotherms and isosteric heat of niger grains (Guizotia abyssinica (L. f.) Cass.) 黑粒(Guizotia abyssinica, L. f.)的解吸等温线和等等热卡斯商学院)。

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2018-06-30 DOI: 10.18227/1982-8470RAGRO.V12I2.4908

V. C. Siqueira, F. P. D. Silva, W. D. Quequeto, R. Jordan, R. Leite, G. A. Mabasso

{"title":"Desorption isotherms and isosteric heat of niger grains (Guizotia abyssinica (L. f.) Cass.)","authors":"V. C. Siqueira, F. P. D. Silva, W. D. Quequeto, R. Jordan, R. Leite, G. A. Mabasso","doi":"10.18227/1982-8470RAGRO.V12I2.4908","DOIUrl":"https://doi.org/10.18227/1982-8470RAGRO.V12I2.4908","url":null,"abstract":"Niger seed oil has excellent quality and quantity (30-50%) and is rich in polyunsaturated fatty acids, mainly linoleic acid (about 70%). Thus, control of environmental temperature and relative humidity, and of seed moisture content is essential to maintain seed oil quality during storage. Thus, the objective of this study was to determine the desorption isotherms of niger seeds under different temperature and water activity conditions, to test the experimental data with different mathematical models, and discover which best represents the phenomenon, as well as calculate the isosteric heat value for the product. Hygroscopicity \u0000was determined by the static gravimetric method, at temperatures of 30, 35 and 40 ºC, and water activity between 0.07 and 0.79 (decimal). For the experimental data, mathematical models commonly used to test hygroscopicity in agricultural products were evaluated. From the results obtained, it was concluded that: water \u0000activity increases as moisture content rises; based on the statistical parameters, the models of Chung and Pfost, modified Henderson, Oswin, Sabbah, Sigma Copace, Halsey, Smith and Copace appropriatrely represented the desorption phenomenon of niger seeds; total isosteric desorption heat increased with reduction of moisture content, with values varying from 2539.62 to 3081.48 kJ kg-1, within the range of equilibrium moisture content of 2.4 to 12.2 (% dry basis).","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"44 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132511669","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: 2