The effect of gibberellin and retardants on the redistribution of carbohydrates and nutrients in gooseberry (Grossularia reclinat (L.) Mill) leaves and stems in relation to the culture productivity

2020 ◽  
Vol 52 (1) ◽  
pp. 31-45 ◽  
Author(s):  
V.G. Kuryata ◽  
◽  
H.S. Shataliuk ◽  
Keyword(s):  
Culture Productivity

scholarly journals FREQUÊNCIA DA FERTIRRIGAÇÃO FOSFATADA NA PRODUTIVIDADE DA CULTURA DA MELANCIA

Irriga ◽  
2018 ◽  
Vol 21 (2) ◽  
pp. 257
Author(s):  
Benito Moreira de Azevedo ◽  
Carlos Newdmar Vieira Fernandes ◽  
Joaquim Raimundo do Nascimento Neto ◽  
Thales Vinícius De Araújo Viana ◽  
Denise Vieira Vasconcelos ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Citrullus Lanatus ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Phosphate Fertilization ◽  
Crop Cycle ◽  
Polar Diameter ◽  
Brazilian Northeast ◽  
Caixa Postal ◽  
Culture Productivity

FREQUÊNCIA DA FERTIRRIGAÇÃO FOSFATADA NA PRODUTIVIDADE DA CULTURA DA MELANCIA BENITO MOREIRA DE AZEVEDO1; CARLOS NEWDMAR VIEIRA FERNANDES2; JOAQUIM RAIMUNDO DO NASCIMENTO NETO3; THALES VINÍCIUS DE ARAÚJO VIANA1; DENISE VIEIRA VASCONCELOS3 E CHRISLENE NOJOSA DIAS FERNANDES3 [1]Departamento de Engenharia Agrícola, CCA/UFC, Av. Mister Hull, s/n, Bloco 804. Caixa Postal 12.168, Fortaleza, CE, Brasil, 60.455 970, [email protected], [email protected] Federal de Educação Ciência e Tecnologia do Ceará (IFCE), Campus Iguatu, Rodovia CE-060, Cajazeiras 63503-790 – Iguatu, CE, Brasil. [email protected] de Pós-Graduação em Engenharia Agrícola, CCA/UFC, Av. Mister Hull, s/n, Bloco 804. Caixa Postal 12.168, Fortaleza-CE, Brasil, 60.455 970, [email protected], [email protected], [email protected]  1 RESUMO A melancia (Citrullus lanatus) tem grande importância socioeconômica para o Nordeste brasileiro, onde o cultivo sob irrigação vem crescendo e permitindo ao produtor ofertar frutos de melhor qualidade. Objetivou-se avaliar a influência de frequências de fertirrigação fosfatada nos componentes de produção e produtividade da melancia. O delineamento adotado foi o de blocos ao acaso constituído por seis tratamentos, referentes a seis frequências de fertirrigação com fósforo, sendo: 2, 4, 8, 16, 32 e 64 fertirrigações no ciclo e quatro repetições. As variáveis analisadas foram: produtividade comercial; massa média do fruto; diâmetro polar; diâmetro equatorial; espessura da casca e teor de sólidos solúveis. O aumento da frequência de fertirrigação fosfatada proporcionou um melhor desempenho da cultura da melancia. As variáveis produtividade comercial e espessura da casca foram influenciadas significativamente pelas frequências de fertirrigação com fósforo, tendo as mesmas apresentado resposta linear. A frequência de fertirrigação fosfatada de 64 fertirrigações no ciclo de cultivo proporcionou a maior produtividade da melancia. Palavras-chave: Citrullus lanatus; quimigação; ácido fosfórico; adubação fosfatada.  AZEVEDO, B. M. de; FERNANDES, C. N. V.; NASCIMENTO NETO, J. R. do; VIANA, T. V. de A.; VASCONCELOS, D. V.; FERNANDES, C. N. D.FREQUENCY OF FERTIRRIGATION WITH PHOSPHATE IN WATERMELON CULTURE PRODUCTIVITY  2 ABSTRACT Watermelon (Citrullus lanatus) is of great socioeconomic importance for the Brazilian Northeast, where crop under irrigation has increased and allowed the producer to offer the best quality fruits. This study aimed to evaluate the influence of frequency of fertirrigation with phosphate  components on watermelon production and productivity. The study design was a randomized block consisting of six treatments, referring to six frequencies of fertirrigation with phosphorus, as follows: 2, 4, 8, 16, 32 and 64 in fertigation cycle and four replications. The variables analyzed were: commercial productivity; fruit weight; polar diameter; equatorial diameter; shell thickness and soluble solids. The increased frequency of phosphorus fertirrigation provided a better performance of the watermelon crop. The variables commercial productivity and shell thickness were significantly influenced by the frequencies of fertirrigation with phosphorus, and presented the same linear response. The 64 frequency of phosphorus fertirrigation  of the crop cycle provided the greatest productivity of watermelon. Keywords: Citrullus lanatus; chemigation; phosphoric acid; phosphate fertilization.

scholarly journals Long-Term Cultivation of a Native Arthrospira platensis (Spirulina) Strain in Pozo Izquierdo (Gran Canaria, Spain): Technical Evidence for a Viable Production of Food-Grade Biomass

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1333
Author(s):  
Flavio Guidi ◽  
Zivan Gojkovic ◽  
Marianna Venuleo ◽  
Patrícia Alexandra Clemente Janeiro Assunçao ◽  
Eduardo Portillo
Keyword(s):  
Arthrospira Platensis ◽  
International Standards ◽  
Solar Irradiation ◽  
Human Consumption ◽  
Promising Alternative ◽  
Gran Canaria ◽  
Chemical Treatments ◽  
Alkaline Conditions ◽  
Culture Productivity

Microalgae cultivation is a promising alternative to traditional agriculture in arid—semi-arid areas. The aim of this study is to assess the viability of long-term cultivation of native Arthrospira platensis in Gran Canaria. Maximum culture productivity (0.08 g/L/day) and optimal concentration range (0.6–0.9 g/L) were firstly determined in 8000 L raceway under a greenhouse. Afterwards, a stable productivity of 0.06 g/L/day (6.0 g/m2/day) was obtained by reusing the culture medium during 26 days of cultivation, with consistent biomass biochemical composition. Outdoor temperature and daily solar irradiation ranged between 17.9–30.7 °C and 79.2–274.8 W/m2, while culture pH and salinity were in the range 9.42–10.77 and 11.2–14.9 g/L, respectively. Protein (>60%), potassium (1.8 g/100 g) and C-phycocyanin (7.2%) content is in the high-range of commercial Spirulina, which makes BEA 1257B promising for food and extraction of natural pigments/antioxidants. The dried biomass complies with international standards for human consumption, because of low heavy metal content and no pathogens presence. Product quality can be improved by reducing ash (≃12%) and sodium (1.5%) content through biomass washing optimization and/or further dewatering step. Other microorganisms can be prevented by high alkaline conditions and mild chemical treatments. These results pave the way for a sustainable microalgae-based blue bioeconomy in the Canary Islands.

scholarly journals Development of bean plants in soil contaminated with trifloxysulfuron-sodium after Stizolobium aterrimum and Canavalia ensiformis cultivation

2007 ◽  
Vol 25 (1) ◽  
pp. 87-96 ◽  
Author(s):  
S.O. Procópio ◽  
J.B. Santos ◽  
F.R. Pires ◽  
A.A. Silva ◽  
E.A. Santos ◽  
...  
Keyword(s):  
Green Manure ◽  
Aerial Part ◽  
Dry Mass ◽  
Canavalia Ensiformis ◽  
Productivity Losses ◽  
Bean Plants ◽  
Grain Productivity ◽  
Four Levels ◽  
Harmful Effects ◽  
Culture Productivity

Phytoremediation, the use of plants to decontaminate soils and water resources from organic pollutants such as herbicides, is economically and environmentally a promising technique applied in many areas, including agriculture. The objective of this work was to evaluate the development of bean plants cultivated in the field, in soil with different levels of trifloxysulfuron-sodium contamination, following cultivation of two green manure species, as well as to evaluate the possibility of recontamination of the area by such herbicide with the straw permanence on the soil. The experiment was carried out in Coimbra, MG, Brazil, on a sandy clayey Red - Yellow Argisol from March to November 2003. Four levels of soil contamination with trifloxysulfuron-sodium (0.00; 3.75; 7.50; and 15.00 g ha-1) were used as well as the following five types of cultivation prior to bean sowing in the area after herbicide application: black velvet beans (Stizolobium aterrimum) followed by removal of straw; S. aterrimum, followed by permanence of straw; jack bean (Canavalia ensiformis), followed by removal of straw; C. ensiformis followed by permanence of straw; and without prior cultivation, weed-free (weeded control). The leguminous plants were kept in the area for 65 days, cut close to the soil, and with its aerial part left or not on the surface of the experimental plot, depending on the treatment. Fifteen days after the species were cut, bean was sown in the area. At 45 days after emergence (DAE) of the bean plants, plant height and dry mass of the aerial part were evaluated. Grain productivity was determined during harvest. Height, dry matter of the aerial part and grain productivity of the bean plants, cultivated in an area previously contaminated with trifloxysulfuron-sodium at any of the levels tested, were higher with prior cultivation of S. aterrimum or C. ensiformis. At the lowest level of herbicide contamination, prior cultivation of C. ensiformis was found to be more efficient than that of S. aterrimum in mitigating the harmful effects of trifloxysulfuron-sodium on bean grain production. The permanence of the straw of the green manure species during the bean cycle did not harm the development of the plants or caused culture productivity losses, indicating that straw permanence in the area does not promote recontamination of the area.

scholarly journals Reduction of Photoautotrophic Productivity in the Cyanobacterium Synechocystis sp. Strain PCC 6803 by Phycobilisome Antenna Truncation

2012 ◽  
Vol 78 (17) ◽  
pp. 6349-6351 ◽  
Author(s):  
Lawrence E. Page ◽  
Michelle Liberton ◽  
Himadri B. Pakrasi
Keyword(s):  
Light Harvesting ◽  
Wild Type ◽  
Content Type ◽  
Photosynthetic Productivity ◽  
Mutant Strains ◽  
Light Harvesting Antenna ◽  
Culture Productivity ◽  
Synechocystis Sp ◽  
Pcc 6803

ABSTRACTTruncation of the algal light-harvesting antenna is expected to enhance photosynthetic productivity. The wild type and three mutant strains ofSynechocystissp. strain 6803 with a progressively smaller phycobilisome antenna were examined under different light and CO2conditions. Surprisingly, such antenna truncation resulted in decreased whole-culture productivity for this cyanobacterium.

VARIATION OF CULTURE PRODUCTIVITY IN THE FUNCTION OF WATER DISTRIBUTION OF EMITORS

2017 ◽  
Author(s):  
I. A. Almeida ◽  
J. O. Costa ◽  
A. N. Almeida ◽  
F. H. Campos ◽  
R. D. Coelho
Keyword(s):  
Water Distribution ◽  
Culture Productivity

scholarly journals MODELOS AGROMETEOROLÓGICOS PARA ESTIMATIVA E COMPARATIVO DE QUEBRA DE PRODUTIVIDADE DA CULTURA DO MILHO*

Irriga ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 693-703
Author(s):  
Taise Cristine Buske ◽  
Adroaldo Dias Robaina ◽  
Marcia Xavier Peiter ◽  
Rogério Ricalde Torres
Keyword(s):  
Water Deficit ◽  
Linear Regression Analysis ◽  
Productivity Loss ◽  
Rio Grande ◽  
Yield Losses ◽  
Rio Grande Do Sul ◽  
Maize Productivity ◽  
Santa Maria ◽  
E Mail ◽  
Culture Productivity

MODELOS AGROMETEOROLÓGICOS PARA ESTIMATIVA E COMPARATIVO DE QUEBRA DE PRODUTIVIDADE DA CULTURA DO MILHO*     TAISE CRISTINE BUSKE1; ADROALDO DIAS ROBAINA2; MARCIA XAVIER PEITER3 E ROGÉRIO RICALDE TORRES4   1 Engenheira Agrônoma; Doutora em Engenharia Agrícola; Docente do Instituto Federal Catarinense – Campus Santa Rosa do Sul, Rua das Rosas s/n - Cx. Postal 04 - CEP 88965-000 - Santa Rosa do Sul/ SC, Brasil; E-mail: [email protected] 2 Engenheiro Agrônomo; Doutor; Professor Titular; Departamento de Engenharia Rural; Universidade Federal de Santa Maria, Av. Roraima nº 1000 - Cidade Universitária - Bairro Camobi – CEP 97105-900 - Santa Maria/ RS, Brasil; E-mail: [email protected] 3 Engenheira Agrônoma; Doutora; Professora Adjunta; Departamento de Engenharia Rural; Universidade Federal de Santa Maria, , Av. Roraima nº 1000 - Cidade Universitária - Bairro Camobi – CEP 97105-900 - Santa Maria/ RS, Brasil; E-mail: [email protected] 4 Engenheiro Agrônomo; Doutor; Docente do Instituto Federal do Rio Grande do Sul – Campus Vacaria, Estrada Engenheiro João Viterbo de Oliveira, 3061 - Zona Rural - CEP: 95219-899, Vacaria/ RS, Brasil; E-mail: [email protected] * O artigo foi gerado a partir da tese do primeiro autor.     1 RESUMO   A agricultura do Rio Grande do Sul é caracterizada pela predominância de culturas de primavera-verão, as quais tem sua produção afetada pelo déficit hídrico. Assim, objetivou-se estimar a produtividade da cultura do milho com os modelos agrometeorológicos e avaliar as quebras de rendimento da cultura na microrregião de Cruz Alta. Para estimar a produtividade real da cultura foram adotados os modelos agrometeorológicos de Jensen (1968), Minhas, Parikh e Srinivasan (1974) e, Doorenbos e Kassan (1979), todos com parâmetros ajustados. A precisão da estimativa foi determinada a partir de análise de regressão linear e correlação. Ainda, foram simuladas as quebras de rendimento para cada ano avaliado, no período de 1993-2014. O desempenho variou de “mau” até “muito bom”, sendo que os modelos de Jensen e Minhas, Parikh e Srinivasan foram classificados como “muito bom” em outubro e novembro. Recomendam-se os coeficientes -0,768, 0,699, 0,374 e -0,330 para o modelo de Jensen, e -1,438, 1,078, 0,439 e -0,442 para o modelo de Minhas, Parikh e Srinivasan, conforme o estádio fenológico. Também, observou-se quebra de rendimento na maioria dos anos estudados, notoriamente nas faixas maiores de 30% de perda de produtividade, podendo atingir frequência relativa de 30% para outubro, novembro e dezembro.   Palavras-chave: déficit hídrico, modelagem, quebra de rendimento.     BUSKE, T. C.; ROBAINA, A. D.; PEITER, M. X.; TORRES, R. R. AGROMETEOROLOGICAL MODELS FOR ESTIMATION AND COMPARATIVE BREAKDOWN OF MAIZE CULTURE PRODUCTIVITY         2 ABSTRACT   Agriculture in the state of Rio Grande do Sul is predominant in spring-summer crops, whose production is affected by water deficit. This study aimed to estimate maize productivity with agrometeorological models and to evaluate crop yield losses in the Cruz Alta micro region. Agrometeorological models, with adjusted parameters  of Jensen (1968), Minhas, Parikh and Srinivasan (1974) and, Doorenbos and Kassan (1979) were adopted to estimate the actual productivity of the crop. The accuracy of the estimation of each model was determined by linear regression analysis and correlation. Also, yield breaks were simulated for each year, in the period of 1993-2014. The performance ranged from “poor” to “very good”, with Jensen's and Minhas, Parikh and Srinivasan models being rated “very good” in October and November. The recommended coefficients are -0.768, 0.699, 0.374 and -0.330 for Jensen’s model, and -1.438, 1.078, 0.439 and -0.442 for Minhas, Parikh and Srinivasan’s model, according to the phonological stage. It was also observed a yield break in most of the years, notoriously where productivity loss is higher than 30%, reaching relative frequency of 30% for October, November and December.   Keywords: water deficit, modeling, break of yield.

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