Cientifica最新文献_第10页

Fruit and seeds biometry and germination of Psidium cauliflorum Landrum & Sobral 花椒果实和种子的生物学特征及萌发

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P114-122

Lorena da Paz Oliveira, A. Mendonça, Geisislaine do Carmo Reis Araújo, Taise Almeida Conceição, M. O. Souza

引用次数: 1

Evapotranspiration: A scientometric analysis 蒸散:科学计量分析

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P08-14

Lorena Alves de Oliveira, D. Casaroli, J. A. Junior, A. W. P. Evangelista

引用次数: 1

Nitrogen fertilization for noble garlic production in high altitude regions of the Brazilian semiarid region 巴西半干旱地区高海拔地区优质大蒜生产中的氮肥施用

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P62-69

Gabriel Henriques, M. Z. Negreiros, F. V. Resende, W. D. A. R. Lopes, R. D. C. Paulino

{"title":"Nitrogen fertilization for noble garlic production in high altitude regions of the Brazilian semiarid region","authors":"Gabriel Henriques, M. Z. Negreiros, F. V. Resende, W. D. A. R. Lopes, R. D. C. Paulino","doi":"10.15361/1984-5529.2019V47N1P62-69","DOIUrl":"https://doi.org/10.15361/1984-5529.2019V47N1P62-69","url":null,"abstract":"Rio Grande do Norte State in Brazil has microregions with altitudes where the edaphoclimatic conditions are favorable to the cultivation of garlic, including vernalized noble garlic. An example is the municipality of Martins, where vegetable cropping is not a traditional practice. Since it is a region with potential for cultivation of noble garlic, comprising soil and climate conditions that are distinct from traditional production regions in Brazil, the use of nitrogen fertilization becomes an alternative to increase crop yield. This fact can stimulate the semiarid producer to invest in the crop, once it guarantees greater economic return. Thus, aiming to evaluate the production of vernalized noble garlic as a function of nitrogen doses applied in top dressing, an experiment was developed from May to August 2014, using a complete randomized complete block design with five replicates. The treatments consisted of the cover application of increasing doses of N (0, 40, 80, 120, and 160 kg ha -1 ). The following were evaluated: plant height; number of leaves; average bulb weight; total, commercial, and noncommercial bulb yield; bulb and bulblet classification; and number of bulblets per bulb. The dose of 90 kg ha -1 nitrogen, applied in top dressing, provided the highest averages of plant height, number of leaves, average bulb weight, and total bulb yield. The dose of maximum economic efficiency was 91 kg ha -1 , which promoted greater commercial bulb yield. The number of bulblets per bulb and bulblet classification were not influenced by nitrogen doses applied in top dressing.","PeriodicalId":35044,"journal":{"name":"Cientifica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44206155","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

In vitro multiplication of sugarcane with different nitrogen and sucrose concentrations 不同氮、蔗糖浓度对甘蔗体外增殖的影响

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P70-76

G. Alcântara, Marília Pereira Machado, R. Oliveira, J. C. B. Filho

{"title":"In vitro multiplication of sugarcane with different nitrogen and sucrose concentrations","authors":"G. Alcântara, Marília Pereira Machado, R. Oliveira, J. C. B. Filho","doi":"10.15361/1984-5529.2019V47N1P70-76","DOIUrl":"https://doi.org/10.15361/1984-5529.2019V47N1P70-76","url":null,"abstract":"Sugarcane is of great economic importance worldwide. Hence, there is great interest in the development of efficient techniques for the production of good quality, homogeneous, disease- and pest-free seedlings. One way to eliminate viruses is through meristem culture. To guarantee success during meristem culture, it is necessary to optimize the components and concentrations of the culture medium. Sucrose is an essential component in the culture medium, serving as a source of carbon and energy for the seedlings. Nitrogen, in turn, is essential in plants because it is a component of biomolecules and countless enzymes. This work evaluates the best combination of nitrogen (75, 100, 125, and 150%) and sucrose (0, 20, 30, and 40 g L -1 ) concentrations in the in vitro multiplication and development of sugarcane cultivar RB036091. The design was completely randomized, in a factorial scheme with four replicates and five explants per experimental unit. The concentration of 20 g L -1 sucrose with 100% nitrogen, from the original formulation of the MS culture medium, provided a better response in sugarcane multiplication.","PeriodicalId":35044,"journal":{"name":"Cientifica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43919613","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

Coexistence of soybean plants and Urochloa spp. under glyphosate and water deficit effects 草甘膦和水分亏缺效应下大豆与乌罗虫的共存

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P36-45

J. N. Silva, L. S. Pereira, Gustavo D. de Sousa, Gustavo Silva Oliveira, A. Jakelaitis

{"title":"Coexistence of soybean plants and Urochloa spp. under glyphosate and water deficit effects","authors":"J. N. Silva, L. S. Pereira, Gustavo D. de Sousa, Gustavo Silva Oliveira, A. Jakelaitis","doi":"10.15361/1984-5529.2019V47N1P36-45","DOIUrl":"https://doi.org/10.15361/1984-5529.2019V47N1P36-45","url":null,"abstract":"In the insertion of forage plants of the genus Urochloa P. Beauv. (Poaceae) coexisting with annual crops, proper management of the intercropping becomes necessary to avoid economic losses. Among management measures, the chemical inhibition of forage plants with herbicide subdoses is highlighted. Therefore, this study evaluates the morphophysiological responses of soybean ( Glycine max (L.) Merr.) genetically modified to tolerate glyphosate (RR soybean), in coexistence with Urochloa spp., treated or not with glyphosate subdoses and subjected to water deficit. Two tests were carried out in pots with forage species Urochloa ruziziensis (R.Germ & Evrard) Crins and Urochloa brizantha (Hochst. Ex A. Rich.) R. D. Webster cv. Marandu coexisting with soybean, in randomized blocks with five replicates. The tests were arranged in a 2x2x2 factorial arrangement: the first factor was represented by the absence and presence of forage; the second by the absence and use of glyphosate subdoses; and the third factor by 50% and 100% field capacity in the pots. The use of glyphosate suppressed the competitive capacity of forages, benefiting the soybean in coexistence. In the absence of suppression from glyphosate, the competition exerted by the forage promoted lower values for the physiological and morphological variables of soybean plants. Among the forages, U. ruziziensis was the most competitive with soybean plants. The root system of forages was not affected by water deficit, only the physiological and morphological characteristics of soybean, mainly rootdry mass. Glyphosate affected forage growth.","PeriodicalId":35044,"journal":{"name":"Cientifica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43117780","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

Growth and nutritional status of maize plants in response to different doses and application frequencies of biofertilizer 不同剂量和施用频率对玉米生长和营养状况的影响

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P123-131

J. S. Rodrigues, M. S. Garrido, José Aliçandro Bezerra da Silva, W. L. Simões, R. A. Silva, M. N. Amorim

{"title":"Growth and nutritional status of maize plants in response to different doses and application frequencies of biofertilizer","authors":"J. S. Rodrigues, M. S. Garrido, José Aliçandro Bezerra da Silva, W. L. Simões, R. A. Silva, M. N. Amorim","doi":"10.15361/1984-5529.2019V47N1P123-131","DOIUrl":"https://doi.org/10.15361/1984-5529.2019V47N1P123-131","url":null,"abstract":"This study analyzed the effect of different doses and application frequencies of a dairy cattle-derived biofertilizer on the growth and nutritional status of maize cv. BRS Caatingueiro in a Yellow Latosol. The experiment was conducted in an open-air nursery at the Federal University of Vale do Sao Francisco, Juazeiro-BA. The experimental design was a randomized complete block design in a 6 x 2 factorial scheme, with six biofertilizer doses (0, 120, 240, 360, 480, and 600 mL per plant) and two fertigation frequencies (7 and 14 days), with five replicates. The seeds of maize cv. BRS Caatingueiro were planted in pots filled with Yellow Latosol. During the crop cycle (90 days), the following variables were evaluated: height, diameter, and number of leaves. During harvest, the variables evaluated were: root and shoot fresh and dry weight, root volume, chlorophyll index, and macro- and micronutrient contents of leaf and root tissue. Biofertilizer applications at14-day frequencies promoted better plant growth compared to 7-day frequencies. However, despite the lower accumulation of some nutrients in relation to the application of larger doses, the dose of 360 mL biofertilizer promoted better root and leaf growth. Considering the uniformity and economy of the application of the product, it is recommended to apply the dose of 360 mL per plant every 14 days.","PeriodicalId":35044,"journal":{"name":"Cientifica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42956756","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

Effect of pre-emergent graminicide herbicides on germination and early development of native species 发芽前除草剂对本地物种发芽和早期发育的影响

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P28-35

R. F. Marques, G. Pinheiro, A. S. Marques, R. M. Souza, S. R. Marchi

{"title":"Effect of pre-emergent graminicide herbicides on germination and early development of native species","authors":"R. F. Marques, G. Pinheiro, A. S. Marques, R. M. Souza, S. R. Marchi","doi":"10.15361/1984-5529.2019V47N1P28-35","DOIUrl":"https://doi.org/10.15361/1984-5529.2019V47N1P28-35","url":null,"abstract":"The occurrence of weeds has been the main obstacle to vegetation recovery in Cerrado areas unduly occupied by agricultural and livestock activities. This study evaluates the effect of different pre-emergent herbicides on the emergence, survival, and early development of seedlings of the native species jatoba ( Hymenaea stigonocarpa ), urucum ( Bixa orellana ), dry flour ( Albizia hasslerii ), and white jurema ( Mimosa interrupta ). The experiment was carried out under greenhouse conditions in a completely randomized experimental design with five replicates, where the treatments were constituted by herbicides: isoxaflutole, applied at the doses of 100, 200, and 300 g ai ha -1 ; pendimethalin, at 500, 1000, and 4000 g ai ha -1 ; and trifluralin, at 600, 1200, and 2400 g ai ha -1 ; in addition to a control treatment, without the application of herbicides. Herbicide phytotoxicity was evaluated at 35 days after emergence for the number of emerged seedlings, number of leaves per seedling, seedling height and diameter, and root and shoot dry weight. With the results obtained, it is possible to affirm that under the conditions of the experiment, all the herbicides and doses used did not affect the emergence and early development of seedlings of species H. stigonocarpa and B. orellana . For species A. hasslerii , the dose of 300 g ai ha -1 of herbicide isoxaflutole was not selective. All doses of the herbicide trifluralin showed selectivity for species M. interrupta .","PeriodicalId":35044,"journal":{"name":"Cientifica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43269445","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

Biopriming in black oat seeds 黑燕麦种子的生物鉴别

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P104-113

E. Junges, M. Muniz, B. Bastos, Pâmela Oruoski, C. Michelon

{"title":"Biopriming in black oat seeds","authors":"E. Junges, M. Muniz, B. Bastos, Pâmela Oruoski, C. Michelon","doi":"10.15361/1984-5529.2019V47N1P104-113","DOIUrl":"https://doi.org/10.15361/1984-5529.2019V47N1P104-113","url":null,"abstract":"This study performs the microbiolization of black oat seeds with Trichoderma spp. and Bacillus subtilis by physiological conditioning, suspension of biological structures, and film coating, improving the control of pathogens and the effect on seed germination and vigor. Microbiolization with suspension of biological structures was carried out with commercial products based on Trichoderma spp. and Bacillus subtilis . Water restriction was performed in PDA + Mannitol (-0.8 MPa) medium, for Trichoderma spp. and B. subtilis . One hundred disinfected seeds of black oat were distributed in each plate. Once root protrusion occurred in one seed, the others were removed and dried, under laboratory conditions, for 48h. Film coating was performed with the addition of polymer to the treatment syrup containing Trichoderma spp. or B. subtilis . The seeds were dried for 48 h in a laboratory environment. A treatment was used to coat the conditioned seeds with the organisms, individually or in combination. Trichoderma spp. and B. subtilis control the pathogens associated with black oat seeds. B. subtilis increases the germination, seedling performance and growth, and dry matter accumulation of black oat. Trichoderma spp. promotes seedling shoot growth and dry matter accumulation in black oat plants. However, Trichoderma spp. and B. subtilis , applied by physiological conditioning and film coating, compromise the germination and emergence of black oat seedlings.","PeriodicalId":35044,"journal":{"name":"Cientifica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46339740","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

Agronomic performance and biochemical attributes of yellow-pulped elite sweet cassava clones 黄浆优质甜木薯无性系的农艺性能和生化特性

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P77-82

E. Fuhrmann, E. Vieira, J. F. Fialho, F. Faleiro, L. Carvalho

{"title":"Agronomic performance and biochemical attributes of yellow-pulped elite sweet cassava clones","authors":"E. Fuhrmann, E. Vieira, J. F. Fialho, F. Faleiro, L. Carvalho","doi":"10.15361/1984-5529.2019V47N1P77-82","DOIUrl":"https://doi.org/10.15361/1984-5529.2019V47N1P77-82","url":null,"abstract":"Cassava storage root is the staple food of most of the Brazilian population. In this study, 13 cassava clones were evaluated for agronomic and biochemical traits compared to the control variety IAC 576-70. The experiments were conducted at Embrapa Cerrados during two harvest seasons. A randomized complete block design was used with three replicates, each plot consisting of 4 rows of 10 plants. Trait means were grouped by the Scott-Knott clustering test at 5% probability. The results highlighted clones 273/08 and 259/08, based on first branch height; 90/08, 272/08, 273/08, 497/08, 259/08, and 450/08, based on plant height; 94/08 and 272/08, based on shoot weight without the original stem cutting; 26/08, 272/08, 259/08, and 450/08, based on root starch percentage; and 215/08, based on root yield. In the 2011/2012 season, all clones showed cooking time less than 30 minutes. Regarding root protein content, clones 26/08, 90/08, and 91/08 were highlighted. HCN levels in cassava roots were below 100 mg kg -1 in all clones evaluated. We found elite clones with high levels of root carotenoids, especially clones 91/08, 94/08, 215/08, 246/08, 272/08, and 497/08. These clones have great potential for direct use by producers, and can be used as promising parents in genetic breeding programs of cassava.","PeriodicalId":35044,"journal":{"name":"Cientifica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47776904","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

Genetic divergence between pepper accessions based on quantitative fruit traits 基于果实数量性状的辣椒品种间遗传差异

Cientifica Pub Date : 2019-03-20 DOI: 10.15361/1984-5529.2019V47N1P83-90

Ana Carolina Ribeiro de Oliveira, P. Cecon, M. Nascimento, F. Finger, G. M. Pereira, Guilherme Alves Puiatti

{"title":"Genetic divergence between pepper accessions based on quantitative fruit traits","authors":"Ana Carolina Ribeiro de Oliveira, P. Cecon, M. Nascimento, F. Finger, G. M. Pereira, Guilherme Alves Puiatti","doi":"10.15361/1984-5529.2019V47N1P83-90","DOIUrl":"https://doi.org/10.15361/1984-5529.2019V47N1P83-90","url":null,"abstract":"The development of new Capsicum cultivars aiming to meet market requirements will depend, above all, on the genetic diversity of the study population. To quantify this genetic divergence, several multivariate techniques assessing quantitative traits have been employed. This study aimed to: i. estimate the genetic diversity among Capsicum chinense accessions from the Active Germplasm Bank of Plants of the Federal University of Vicosa (BGH-UFV); ii. indicate promising accessions for prospective studies of specific market niches; iii. evaluate the disposal of redundant traits. The experiment was conducted in a completely randomized design with four replicates, in which 11 C. chinense accessions were evaluated, based on 11 quantitative fruit traits. The data were subjected to cluster analysis by the UPGMA and Tocher methods, based on the quadratic Euclidean distance, to assess diversity. Afterwards, we used principal component analysis, Jolliffe’s method and procrustes analysis for the disposal of traits. The highest genetic dissimilarity was obtained between accessions 2 and 10. The phenotypic correlation coefficients obtained were 0.75 (UPGMA) and 0.91 (Tocher), the latter being significant by the Mantel test (p < 0.05). Six clusters were formed by using the Tocher method, four of which were composed by a single accession. Regarding the disposal of variables, traits TFDW, TFFW, PUN, %DM, FW, PT, and FL were shown to be disposable, and do not affect diversity prediction in terms of graphic dispersion. Accessions 9, 10, and 11 are indicated for in natura consumption, while accessions 2 and 3 are indicated for industrial purposes. These accessions showed the best results among the evaluated traits for the mentioned niches.","PeriodicalId":35044,"journal":{"name":"Cientifica","volume":"1978 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41262929","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