Densidade Populacional De Sorgo E Seus Efeitos Na Produtividade E Qualidade Da Semente

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Densidade populacional de sorgo e seus efeitos na produtividade e qualidade da semente

Author : J.J.B.N. Xavier
Publisher :
ISBN 13 :
Total Pages : 79 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Densidade populacional de sorgo e seus efeitos na produtividade e qualidade da semente by : J.J.B.N. Xavier

Download or read book Densidade populacional de sorgo e seus efeitos na produtividade e qualidade da semente written by J.J.B.N. Xavier and published by . This book was released on 1985 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estudo realizado para avaliacao dos efeitos de diferentes densidades populacionais sobre o desenvolvimento, produtividade da planta e qualidade da semente de sorgo granifero e forrageiro. Em condicoes de campo, foram desenvolvidos dois ensaios (um de sorgo granifero, outro, forrageiro),compreendendo, cada um, seis diferentes densidades de plantas por metro linear. Em condicoes de laboratorio, dois outros ensaios foram realizados com sementes procedentes dos experimentos de campo, com o objetivo de se determinar o peso volumetrico da semente, peso de 1000 sementes, percentagem de germinacao, comprimento de raiz de plantula e peso seco de plantula. Dos resultados obtidos, concluiu-se que para a obtencao de sementes de sorgo em quantidades e qualidades satisfatorrias, sao necessarias populacoes adequadas, de modo que a competicacao entre as plantas atinja determinado grau de eficiencia e, assim, permitir um equilibrio entre as fases vegetativas e reprodutivas da cultura.

Influencia da densidade da semente de sorgo na germinacao, vigor e produtividade

Author : D.J. Vieira
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Influencia da densidade da semente de sorgo na germinacao, vigor e produtividade by : D.J. Vieira

Download or read book Influencia da densidade da semente de sorgo na germinacao, vigor e produtividade written by D.J. Vieira and published by . This book was released on 1981 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sementes das cultivares de sorgo (Sorghum bicolor L. Moench), EA-955 (granifero) e EA-116 (forrageiro) foram separados atraves da mesa gravitacional em seis classes de densidades. Um setimo tratamento incluiu sementes nao classificadas. Avaliou-se a influencia da densidade da semente na germinacao, no vigor e na producao de graos. Os trabalhos foram conduzidos no Laboratorio de Sementes, em Fortaleza, CE., pertencentes ao Centro de Ciencias Agrarias da Universidade Federal do Ceara, no periodo de abril a setembro de 1980. A qualidade da semente foi avaliada, pelo peso volumetrico, peso de 100 sementes, teor de proteina, porcentagem de germinacao, comprimento de raiz, peso seco de plantulas, velocidade de emergencia, peso seca da parte aerea e populacao inicial .A produtividade foi tambem avaliada em uma area irrigada. Sementes das duas cultivares responderam ao efeito da densidade, apresentando o mesmo comportamento. Os resultados indicaram que o peso volumetrico e o peso 100 sementes foram estritamente relacionados com a densidade da semente. Sementes de alta densidade apresentaram menor teor de proteina, porem foram mais vigorosas, apresentando maior poder germinativo, mais rapida emergencia, originando plantulas mais desenvolvidas. Entretanto, nao foram observadas diferencas significativas quando se avaliou a producao de graos por area.

Qualidade da semente e densidade de semeadura no estabelecimento e na produtividade do milho

Author : C. Andreoli
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Qualidade da semente e densidade de semeadura no estabelecimento e na produtividade do milho by : C. Andreoli

Download or read book Qualidade da semente e densidade de semeadura no estabelecimento e na produtividade do milho written by C. Andreoli and published by . This book was released on 2002 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uma das principais causas da baixa produtividade de milho é a qualidade da semente, que afeta o estande inicial, o vigor das plantas, e conseqüentemente, a produtividade. O objetivo deste trabalho foi determinar o efeito da qualidade da semente e a densidade de semeadura no estabelecimento e na produtividade de milho. Quatro lotes de sementes de milho BRS 201, com germinação de 95%, 90%, 85% e 75%, foram semeados em três densidades de semeadura: 50, 60 e 70 mil sementes/ha, nos anos de 1996/97 e 1997/98. A baixa qualidade da semente provocou reduções acentuadas na emergência de campo, no número de plantas e, conseqüentemente, na produtividade do milho BRS 201.O aumento da densidade de 50 para 70 mil sementes/ha, na semeadura, não compensou a redução da qualidade da semente. Para o acréscimo de 15% na germinação, foi observado, em média, um ganho de produtividade de 30%. Com base nos resultados destes trabalho, recomenda-se aos produtores de milho a utilização de lotes de sementes com germinação superior a 90% e densidade de semeadura entre 50 e 60 mil sementes/ha.

Efeitos da densidade populacional e do espacamento sobre a producao de sorgo, Sorghum bicolor (L.) Moench

Author : F.B.F. Mamede
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Efeitos da densidade populacional e do espacamento sobre a producao de sorgo, Sorghum bicolor (L.) Moench by : F.B.F. Mamede

Download or read book Efeitos da densidade populacional e do espacamento sobre a producao de sorgo, Sorghum bicolor (L.) Moench written by F.B.F. Mamede and published by . This book was released on 1976 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oito populacoes de plantas variando de 66.500 a 400.000 plantas por hectare, distribuidas nos espacamentos 0,50 e 0,75,, cada uma submetida a quatro densidade de plantas por metro linear (5, 10, 15 e 20) foram testadas com sorgo forrageiro e granifero, nos municipios de Redencao e Cascavel, em 1975, para se poder estimar ate que ponto tais variacoes populacionais poderiam influenciar, tanto na producao de massa verde, como na producao de graos. Os cultivares utilizados na pesquisa foram o EA-116 e o EA-955 (Serena) representantes dos tipos forrageiro e granifero, respectivamente, por se revelarem superiores em competicoes realizadas nos anos anteriores e de boa adaptabilidade no Estado do Ceara. Empregou-se um fatorial 2 x 4 em blocos ao acaso, com oito tratamentos e quatro repeticoes. Algumas caracteristicas foram mensuradas e realizados estudos de correlacao linear e coeficientes de caminhamento (Path Coefficient) com a producao de massa verde e producao de graos, para sorgos forrageiros e granifero, respectivamente, com a finalidade de se avaliar o efeito das mesmas sobre a producao. As seguintes conclusoes foram obtidas: Sorgo forrageiro - O peso total de planta exprimiu a producao de massa verde e dos resultados alcancados, pode-se verificar que as densidades, 10 a 15 plantas por metro linear com 0,50 m entre as fileiras, revelaram-se como as de maior producao de massa verde. A partir das correlacoes encontradas e dos coeficientes de caminhamento decompostos em seus efeitos diretos e indiretos, (...).

Efeito do desfolhamento na produtividade e qualidade da semente de sorgo forrageiro, Sorghum bicolor (L.) Moench

Author : C.A. de S. PINTO
Publisher :
ISBN 13 :
Total Pages : 57 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Efeito do desfolhamento na produtividade e qualidade da semente de sorgo forrageiro, Sorghum bicolor (L.) Moench by : C.A. de S. PINTO

Download or read book Efeito do desfolhamento na produtividade e qualidade da semente de sorgo forrageiro, Sorghum bicolor (L.) Moench written by C.A. de S. PINTO and published by . This book was released on 1981 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nesta pesquisa foram observados os efeitos do desfolhamento na produtividade, componentes da producao, e na qualidade da semente de sorgo forrageiro, Sorghum bicolor (L.) Moench, cultivar EA-116. Os trabalhos foram realizados em area irrigada da Fazenda Experimental do Vale do Curu, em Pentecoste e nos Laboratorios de Tecnologia de Sementes e Nutricao Animal pertencentes ao Centro de Ciencias Agrarias da Universidade Federal do Ceara, durante o ano de 1980. Os tratamentos foram representados por seis niveis de desfolhamento (remocao da folha bandeira, remocao da folha imediatamente inferior a bandeira, remocao das 2 folhas inferiores a bandeira, remocao das 3 folhas inferiores a bandeira, remocao das 4 folhas inferiores a bandeira e remocao total das folhas, exceto a bandeira), aplicados no estagio de embuchamento das plantas, e mais o tratamento testemunha (sem remocao das folhas). Apesar de se tratar de sorgo forrageiro, a produtividade foi avaliada em termos de producao de sementes e comparada com o numero de sementes por panicula e peso de 1000 sementes. A analise de qualidade da semente compreendeu o percentual de germinacao, comprimento da raiz de plantulas, peso seco de plantulas e teor de proteina. A remocao da folha bandeira e de ate 2 folhas inferiores a esta nao causou decrescimos na produtividade. No entanto, quando foram removidas 3 ou 4 folhas inferiores a bandeira, constatou-se uma diminuicao de aproximadamente 1000kg/ha. a remocao de todas as folhas, exceto a folha bandeira causou (...).

Fertilizing for High Yield and Quality

Author : Lindbergue Araújo Crisóstomo
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (891 download)

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Book Synopsis Fertilizing for High Yield and Quality by : Lindbergue Araújo Crisóstomo

Download or read book Fertilizing for High Yield and Quality written by Lindbergue Araújo Crisóstomo and published by . This book was released on 2007 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acerola; Banana; Cashew: dwarf variety; Citrus; Coconut: green dwarf variety; Guava; Mango; Papaya; Passion-fruit; Pineapple; Soursop.

Horticultura brasileira

Author :
Publisher :
ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Horticultura brasileira by :

Download or read book Horticultura brasileira written by and published by . This book was released on 2002 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Proximal Soil Sensing

Author : Raphael A. Viscarra Rossel
Publisher : Springer Science & Business Media
ISBN 13 : 9048188598
Total Pages : 440 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Proximal Soil Sensing by : Raphael A. Viscarra Rossel

Download or read book Proximal Soil Sensing written by Raphael A. Viscarra Rossel and published by Springer Science & Business Media. This book was released on 2010-07-25 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on developments in Proximal Soil Sensing (PSS) and high resolution digital soil mapping. PSS has become a multidisciplinary area of study that aims to develop field-based techniques for collecting information on the soil from close by, or within, the soil. Amongst others, PSS involves the use of optical, geophysical, electrochemical, mathematical and statistical methods. This volume, suitable for undergraduate course material and postgraduate research, brings together ideas and examples from those developing and using proximal sensors and high resolution digital soil maps for applications such as precision agriculture, soil contamination, archaeology, peri-urban design and high land-value applications, where there is a particular need for high spatial resolution information. The book in particular covers soil sensor sampling, proximal soil sensor development and use, sensor calibrations, prediction methods for large data sets, applications of proximal soil sensing, and high-resolution digital soil mapping. Key themes: soil sensor sampling – soil sensor calibrations – spatial prediction methods – reflectance spectroscopy – electromagnetic induction and electrical resistivity – radar and gamma radiometrics – multi-sensor platforms – high resolution digital soil mapping - applications Raphael A. Viscarra Rossel is a scientist at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) of Australia. Alex McBratney is Pro-Dean and Professor of Soil Science in the Faculty of Agriculture Food & Natural Resources at the University of Sydney in Australia. Budiman Minasny is a Senior Research Fellow in the Faculty of Agriculture Food & Natural Resources at the University of Sydney in Australia.

Integrated Management and Biocontrol of Vegetable and Grain Crops Nematodes

Author : A. Ciancio
Publisher : Springer Science & Business Media
ISBN 13 : 1402060637
Total Pages : 364 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Integrated Management and Biocontrol of Vegetable and Grain Crops Nematodes by : A. Ciancio

Download or read book Integrated Management and Biocontrol of Vegetable and Grain Crops Nematodes written by A. Ciancio and published by Springer Science & Business Media. This book was released on 2007-12-08 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second volume of the IMPD series describes aspects related to the most important phytoparasitic nematodes, considering the integration of biological control methods with other management practices and technologies, including the use of predatory nematodes and microbial rhizosphere antagonists. A focus is given on regional issues. A review on nematode management in cotton is integrated by a chapter on management of nematodes on wheat. New technologies are also revised.

Physiology of Crop Production

Author : N.K. Fageria
Publisher : CRC Press
ISBN 13 : 9781560222897
Total Pages : 366 pages
Book Rating : 4.2/5 (228 download)

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Book Synopsis Physiology of Crop Production by : N.K. Fageria

Download or read book Physiology of Crop Production written by N.K. Fageria and published by CRC Press. This book was released on 2006-05-16 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: This single volume explores the theoretical and the practical aspects of crop physiological processes around the world The marked decrease over the past century in the land available for crop production has brought about mounting pressure to increase crop yields, especially in developing nations. Physiology of Crop Production provides cutting-edge research and data for complete coverage of the physiology of crop production, all in one source, right at your fingertips. This valuable reference gives the extensive in-depth information soil and crop professionals need to maximize crop productivity anywhere the world. Leading soil and plant scientists and researchers clearly explain theory, practical applications, and the latest advances in the field. Crop physiology is a vital science needed to understand crop growth and development to facilitate increases of plant yield. Physiology of Crop Production presents a wide range of information and references from varying regions of the world to make the book as complete and broadly focused as possible. Discussion in each chapter is supported by experimental data to make this book a superb resource that will be used again and again. Chapter topics include plant and root architecture, growth and yield components, photosynthesis, source-sink relationship, water use efficiency, crop yield relative to water stress, and active and passive ion transport. Several figures and tables accompany the extensive referencing to provide a detailed, in-depth look at every facet of crop production. Physiology of Crop Production explores management strategies for: ideal plant architecture maximizing root systems ideal yield components maximizing photosynthesis maximizing source-sink relationship sequestration of carbon dioxide reducing the effects of drought improving N, P, K, Ca, Mg, and S nutrition improving micronutrient uptake Physiology of Crop Production is an essential desktop resource for plant physiologists, soil and crop scientists, breeders, agronomists, agronomy administrators in agro-industry, educators, and upper-level undergraduate and graduate students.

The Physiology of Vegetable Crops, 2nd Edition

Author : Hans Christian Wien
Publisher : CABI
ISBN 13 : 1786393778
Total Pages : 511 pages
Book Rating : 4.7/5 (863 download)

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Book Synopsis The Physiology of Vegetable Crops, 2nd Edition by : Hans Christian Wien

Download or read book The Physiology of Vegetable Crops, 2nd Edition written by Hans Christian Wien and published by CABI. This book was released on 2020-05-01 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely updated and revised, this bestselling book continues to explain the growth and developmental processes involved in the formation of vegetables. Since the publication of the successful first edition significant discoveries, particularly in the area of molecular biology, have deepened and broadened our knowledge and understanding of these processes. This new edition brings the topic up-to-date and is presented over two sections: the first provides general knowledge on germination, transplanting, flowering, the effects of stress and modelling, whilst the second section details the physiology of specific crops or crop groups.

Australian Journal of Agricultural Research

Author :
Publisher :
ISBN 13 :
Total Pages : 442 pages
Book Rating : 4.:/5 (6 download)

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Book Synopsis Australian Journal of Agricultural Research by :

Download or read book Australian Journal of Agricultural Research written by and published by . This book was released on 2000 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mastitis Control in Dairy Herds

Author : Roger William Blowey
Publisher : CABI
ISBN 13 : 1845935500
Total Pages : 272 pages
Book Rating : 4.8/5 (459 download)

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Book Synopsis Mastitis Control in Dairy Herds by : Roger William Blowey

Download or read book Mastitis Control in Dairy Herds written by Roger William Blowey and published by CABI. This book was released on 2010 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second edition of the book, containing 16 chapters which focus on prevention and control of mastitis as well as on the different factors that lead to mastitis resulting in poor milk quality. The book contains two appendices, the first contains a liner line chart and the second contains parlour audit. An index is also provided.

Southern Forages

Author : Donald M. Ball
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Southern Forages by : Donald M. Ball

Download or read book Southern Forages written by Donald M. Ball and published by . This book was released on 1996 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Soil Management for Sustainability

Author : R. Lal
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Soil Management for Sustainability by : R. Lal

Download or read book Soil Management for Sustainability written by R. Lal and published by . This book was released on 1991 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book manuscripts presented originally at a World Association of Soil and Water Conservation conference held in 1989 are collected. Topics include basic processes (e.g. soil structure, soil erosion, soil compaction); management options (e.g. conservation tillage); policy issues and priorities

Soil Ecotoxicology

Author : Joseph Tarradellas
Publisher : CRC Press
ISBN 13 : 9781566701341
Total Pages : 406 pages
Book Rating : 4.7/5 (13 download)

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Book Synopsis Soil Ecotoxicology by : Joseph Tarradellas

Download or read book Soil Ecotoxicology written by Joseph Tarradellas and published by CRC Press. This book was released on 1996-12-23 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soils are receptacles for a wide range of hazardous chemicals generated by human activities. Whether or not this contamination is deliberate, accurate toxicity assessments are important for health and economic reasons. Soil Ecotoxicology discusses the sources, fate, and transport of hazardous chemicals in soils. The fate (biodegradation and modeling) and the potential impacts of pesticides on soil ecosystems are emphasized, and methodologies for performing toxicity assessments are provided.

Microplastic Pollutants

Author : Christopher Blair Crawford
Publisher : Elsevier
ISBN 13 : 0128094060
Total Pages : 336 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Microplastic Pollutants by : Christopher Blair Crawford

Download or read book Microplastic Pollutants written by Christopher Blair Crawford and published by Elsevier. This book was released on 2016-11-29 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microplastic Pollutants introduces the reader to the growing problem of microplastic pollution in the aquatic environment and is the first ever book dedicated exclusively to the subject of microplastics. Importantly, this timely full-colour illustrated multidisciplinary book highlights the very recent realization that microplastics may transport toxic chemicals into food chains around the world. Microplastic pollutants is currently an important topic in both industry and academia, as well as among legislative bodies, and research in this area is gaining considerable attention from both the worldwide media and scientific community on a rapidly increasing scale. Ultimately, this book provides an excellent source of reference and information on microplastics for scientists, engineers, students, industry, policy makers and citizens alike.