|
|
|
| Registros recuperados: 11 | |
|
|
| ZOHAIB,A.; ANJUM,S.A.; JABBAR,A.; TABASSUM,T.; ABBAS,T.; NAZIR,U.. |
| ABSTRACT The present study was aimed at determining the allelopathic influence of water extracts at varying concentrations (2.5% and 5% w/v) and residues with varying decomposition periods (0, 15 and 30 days) at 2% (w/w) concentration of four weeds (Trigonella polycerata, Vicia sativa, Lathyrus aphaca, Medicago polymorpha) against rate, synchronization and time of germination, and biomass partitioning of rice through plant and soil bioassays. Germination and biomass partitioning in rice plants were inhibited by extracts and residues. The maximum decrease in energy of germination (88.6%) and increase in time for 50% germination (210.4%) were caused by the L. aphaca extract at 5% concentration as compared to control. Root and shoot, fresh weight (13.6 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Leguminous weeds; Rice; Germination; Biomass partitioning. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100269 |
| |
|
|
| Oliveira,Adilson Serafim de; Ferreira,Cristiane Silva; Graciano-Ribeiro,Dalva; Franco,Augusto César. |
| Wetlands are common in the Cerrado (Brazilian savannas) biome, however flooding of these wetlands impairs growth and development of most plants. We evaluated flood tolerance of typical Cerrado trees. Seedlings of Aspidosperma macrocarpon (Apocynaceae), Tabebuia rosea (Bignoniaceae), Handroanthus chrysotrichus (Bignoniaceae), Myracrodruon urundeuva (Anacardiaceae), Kielmeyera coriacea (Calophyllaceae) and Copaifera langsdorffii (Fabaceae) were flooded up to the stem base for 30 days. Stems with cortical cracks, secondary aerenchyma and hypertrophic lenticels were observed in flooded plants of M. urundeuva,H. chrysotrichus and T. rosea while adventitious roots were formed in flooded plants of T. rosea and H. chrysotrichus. However, only T. rosea developed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aerenchyma; Biomass partitioning; Flood tolerance; Hypoxia; Water stress. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400478 |
| |
|
|
| Gutman, Mario; Agricultural Research Organization; mgutman@shani.net; Noy-Meir, Imanuel; Hebrew University of Jerusalem; noymeir@agri.huji.ac.il; Pluda, Daniel C; Volcani Center;; Seligman, No'am; Volcani Center; noamseli@netvision.net.il; Rothman, Steven; ;; Sternberg, Marcelo; Tel Aviv University; MarceloS@tauex.tau.ac.il. |
| A two-year experiment was conducted in northeastern Israel to study the effects of various defoliation regimes on biomass partitioning between vegetative and reproductive structures in a perennial and an annual Mediterranean grass. Greater insight into the mechanisms regulating biomass partitioning after defoliation enables ecologists and rangeland managers to interpret and predict population and community dynamics in Mediterranean grasslands more efficiently. Two typical Mediterranean grasses, Triticum dicoccoides, an annual species, and Hordeum bulbosum, a perennial species, were grown in containers in the open. They were subjected to a series of defoliation treatments that comprised three clipping frequencies and three clipping heights in a full... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Annual vs. perennial grasses; Biomass partitioning; Defoliation treatments; Grasslands; Grazing response; Hordeum bulbosum; Israel; Mediterranean; Reproductive effort; Triticum dicoccoides; Vegetative vs. reproductive structures.. |
| Ano: 2001 |
|
| |
|
|
| RONQUIM, C. C.. |
| The responses facing specific constraints (e.g. shade, water stress, mineral deficiency) must be quantified in order to estimate the real capacity of each Cerrado species to act as a carbon sinker. Studying several levels of organization at same time it was possible to point out how phenotypic plasticity operates in five young Cerrado woody species, Copaifera langsdorffii Desf, Cybistax antisyphilitica (Mart) Mart., Tabebuia chrysotricha (Mart. ex DC) Mart., Anadenanthera falcata (Benth.) Speg., and Stryphnodendron adstringens (Mart.) Coville, submitted to different irradiance and under transitory increasing of atmosphere CO2 availability. The objective this work are verify the impact of irradiance availability on carbon assimilation and biomass alocation... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Leaf gas exchange; Irradiance; Biomass partitioning. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/902506 |
| |
|
|
| Stagnari,Fabio; Galieni,Angelica; D’Egidio,Sara; Pagnani,Giancarlo; Ficcadenti,Nadia; Pisante,Michele. |
| ABSTRACT Experiments were carried out to study patterns of artificial defoliation in radish in combination with sulphur (S) fertilization, to evaluate the contribution of younger and older leaves on plant growth and phenolics accumulation in storage roots. Biomass accumulation and partitioning were related to leaf age, magnitude and timing of the clipping treatments. Older leaves increased biomass production and translocation into the storage organ; besides, they induced higher accumulation of phenolic compounds compared to the younger leaves. The highest S fertilization rate (120 kg ha-1) significantly enhanced the polyphenols accumulation, as well as the antiradical activity. The modulation of S inputs in combination with slightly induced stress from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Raphanus sativus; Biomass partitioning; Phenolic compounds; Sulphur fertilization. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300313 |
| |
|
| |
|
| |
|
| |
|
|
| Sales,Rita Manuele Porto; Fries,Daniela Deitos; Pires,Aureliano José Vieira; Bonomo,Paulo; Santana,Sérgio Adorno de; Santos,Iasminy Silva; Rocha,Aline Viana; Sobral,Daiane Maria Pinto Ladeia. |
| The objective was to evaluate the effect of nitrogen fertilization on the establishment of forage peanut (Arachis pintoi cv. Belmonte) propagated vegetatively. The experiment was conducted in a greenhouse in a completely randomized design with treatments arranged in a 2 × 4 factorial design - two ages (70 and 85 days after planting) and four nitrogen doses (0, 40, 80 and 120 kg/ha) - with four replications. Morphogenetic and structural characteristics and production were evaluated. The nitrogen accelerated the establishment of the forage peanut with an increase in dry weight of green leaves and stolons. The greatest length of stolons (48.0 cm) was obtained with a dose equivalent to 86 kg N/ha and higher density of stolons (20 stolons/vase) between 78 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass partitioning; Forage peanut; Legume; Morphogenesis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001100001 |
| |
|
|
| VALENTIM, J. F.; ANDRADE, C. M. S. de. |
| Este estudo comparou a eficiência de diferentes métodos de introdução da leguminosa "Arachis pintoi" Ap 65 (amendoim forrageiro) em pastagens estabelecidas de "Brachiaria brizantha" cv. Marandu consorciada com "Pueraria phaseoloides", em Rio Branco, Acre. O delineamento experimental foi de blocos casualizados, com 4 repetições. Os tratamentos testados foram testemunha (sem plantio do amendoim forrageiro), plantio direto em covas, plantio em sulcos, com grade aradora, com arado de aiveca e com arado de disco. Avaliou-se a cobertura do solo, composição botânica, fo rragem disponível e custo dos métodos de plantio. Todos os métodos avaliados foram eficientes para introdução do amendoim forrageiro em pastagens estabelecidas de "B. brizantha". Os métodos de... |
| Tipo: Parte de livro |
Palavras-chave: Leguminosas forrajeras; Amendoim forrageiro; Forage peanut; Cacahuetes forrajeros; Arachis repens; Biomass partitioning; Conservación del germoplasma; Semillas; Factores ambientales; Acumulación de materia seca; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Leguminosa Forrageira; Biomassa; Semente; Banco de Germoplasma; Condição Ambiental; Matéria Seca; Campo Experimental; Forage legumes; Arachis pintoi; Seeds; Environmental factors; Dry matter accumulation; Arachis glabrata; Germplasm conservation. |
| Ano: 2003 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/502653 |
| |
|
|
| SCHWERZ,FELIPE; MEDEIROS,SANDRO L.P.; ELLI,ELVIS F.; ELOY,ELDER; SGARBOSSA,JAQUELINE; CARON,BRAULIO O.. |
| Abstract Sugarcane (Sacharum officinarum L.) monocropping has had a great socio-economic and environmental impact in Brazil, and agroforestry systems have been considered as an alternative for more sustainable production; however, there is a lack of field research under such conditions. The aim of this study was to evaluate the growth rates, radiation use efficiency and yield traits in sugarcane cultivated in the understory of Aleurites fordii, in two agroforestry arrangements and monocropping systems. A field experiment was conducted from July 2015 to June 2016 in the city of Frederico Westphalen, Rio Grande do Sul, Brazil. The radiation use efficiency, assimilate partitioning, leaf area index, absolute growth rate, net assimilation rate, number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass partitioning; Crop systems; Growth rates; Sacharum officinarum; Yield traits. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703265 |
| |
| Registros recuperados: 11 | |
|
|
|
