Results 21 to 30 of about 55,336 (256)

Nitrogen nutrition index and morphogenesis in Alexandergrass of the Central Depression of Rio Grande do Sul

Ciência Rural, 2023
: This study assessed the nitrogen nutrition index, morphogenic characteristics and tiller structure of Alexandergrass (Urochloaplantaginea (LINK) Hitch) pasture submitted to different nitrogen (N) levels (zero, 150 or 300 kg ha-1 of N). The experimental
Paulo Roberto Salvador, Marta Gomes da Rocha, Juliana Medianeira Machado, Tuani Lopes Bergoli, Juliana Missio Machado, Diego Daniel Tiecher, Juliana Brendler Hoerbe, Luciana Pötter   +7 more
doaj   +1 more source

Spring Wheat Leaf Appearance and Temperature: Extending the Paradigm? [PDF]

Annals of Botany, 2003
Extensive research shows temperature to be the primary environmental factor controlling the phyllochron, or rate of leaf appearance, of wheat (Triticum aestivum L.). Experimental results suggest that soil temperature at crown depth, rather than air temperature above the canopy, would better predict wheat leaf appearance rates.
McMaster, Gregory S., Wilhelm, Wally, Palic, D. B., Porter, John R., Jamieson, P. D.   +4 more
openaire   +2 more sources

Cardinal temperatures and thermal requirements for the initial development of two Brazilian native species [PDF]

Pesquisa Agropecuária Brasileira, 2019
: The objective of this work was to estimate the cardinal temperatures and to quantify the thermal requirements for the initial development of seedlings of the native tree species Citharexylum myrianthum and Bixa orellana.
Mábele de Cássia Ferreira, Fabrina Bolzan Martins, Gabriel Wilson Lorena Florêncio, João Pedro Guimarães Cândido Silva, Liliana Auxiliadora Avelar Pereira Pasin   +4 more
doaj   +1 more source

Crescimento de espécies do gênero Brachiaria, sob déficit hídrico, em casa de vegetação Effect of water deficit on the growth of Brachiaria species in greenhouse

Revista Brasileira de Zootecnia, 2005
Avaliaram-se as características morfogênicas, fisiológicas e produtivas de espécies de Brachiaria, durante e após período de estresse hídrico. Os tratamentos foram arranjados em um esquema fatorial 4 x 5 quatro espécies de Brachiaria (B.
Jorge Luiz Schirmer de Mattos, José Alberto Gomide, Carlos Alberto Martinez y Huaman   +2 more
doaj   +1 more source

Características morfogênicas e estruturais do capim-marandu submetido a combinações de alturas e intervalos de corte Morphogenetic and structural characteristics of marandu palisadegrass subjected to combinations of cutting heights and cutting intervals

Revista Brasileira de Zootecnia, 2011
Desenvolveu-se este estudo com o objetivo de avaliar o acúmulo de forragem e as características morfogênicas e estruturais do capim-marandu submetido a combinações de alturas e intervalos de corte. O experimento foi realizado no período de agosto de 2003
Gelson dos Santos Difante, Domicio do Nascimento Júnior, Sila Carneiro da Silva, Valéria Pacheco Batista Euclides, Denise Baptaglin Montagner, Márcia Cristina Teixeira da Silveira, Karine da Silva Pena   +6 more
doaj   +1 more source

Filocrono de genótipos de arroz irrigado em função de época de semeadura Phyllochron of rice genotypes as a function of sowing date

Ciência Rural, 2007
O filocrono é definido como o tempo necessário para o aparecimento de folhas sucessivas em um colmo, no caso de espécies da família das Poáceas. Através do filocrono, pode-se calcular o número de folhas acumuladas, o que é uma excelente maneira de ...
Nereu Augusto Streck, Simone Michelon, Hamilton Telles Rosa, Lidiane Cristine Walter, Leosane Cristina Bosco, Gizelli Moiano de Paula, Cátia Camera, Flávia Kaufmann Samboranha, Elio Marcolin, Sidinei José Lopes   +9 more
doaj   +1 more source

Approaches to Modeling Potato Leaf Appearance Rate [PDF]

Agronomy Journal, 2006
Two approaches quantifying potato (Solanum tuberosum L. cv. Kennebec) leaf appearance rates were evaluated: a thermal time approach using the phyllochron, and a nonlinear temperature response approach using a modified β distribution function. Leaf appearance measurements at six temperature treatments (14/10, 17/12, 20/15, 23/18, 28/23, and 34/29°C ...
David H. Fleisher, Rose M. Shillito, Dennis J. Timlin, Soo‐Hyung Kim, Vangimalla R. Reddy   +4 more
openaire   +1 more source

Cardinal temperatures and modeling of vegetative development in guava [PDF]

Revista Brasileira de Engenharia Agrícola e Ambiental, 2019
The aim of this study was to estimate cardinal temperatures (base, optimum, and maximum), and simulate the vegetative development of guava crop through phyllochron (linear) and Wang and Engel (nonlinear) models at the seedling phase.
Mábele de C. Ferreira, Fabrina B. Martins, Gabriel W. L. Florêncio, Liliana A. A. P. Pasin   +3 more
doaj   +1 more source

Distribution characteristics of polycyclic aromatic hydrocarbons in Chinese flowering cabbage in different periods [PDF]

E3S Web of Conferences, 2023
The purpose of this study is to investigate the distribution characteristics of polycyclic aromatic hydrocarbons (PAHs) in Chinese flowering cabbage at different growth stages, and provide reference for people's daily diet and production activities.
He Gangjian, Sun Qiaojian, Long Minghua
doaj   +1 more source

Leaf appearance rate and phyllochron on millet sowing dates

REVISTA BRASILEIRA DE MILHO E SORGO, 2023
The objective of this study was to determine the leaf appearance rate and phyllochron as affected by millet sowing dates. The experiment was conducted with six sowing dates (11/28/2019, 12/03/2019, 12/10/2019, 12/17/2019, 12/30/2019 and 01/14/2020). The sowing was performed in plots with six rows of 2 m length and spacing of 0.25 m between rows.
Felipe Manfio Somavilla, Alberto ​Cargnelutti Filho, Ismael Mario Márcio Neu, Daniela Lixinski Silveira, Valéria Escaio Bubans, Gabriel Elias Dumke   +5 more
openaire   +1 more source