Results 271 to 280 of about 1,865,920 (327)

Leaf Appearance Rate and Final Leaf Number of Switchgrass Cultivars

Crop Science, 1997
In switchgrass (Panicum virgatum L.), maximum yields occur with late flowering genotypes that have an extended duration of vegetative growth. However, little is known about the developmental basis for a long vegetative growth phase in perennial grasses.
G. Esbroeck, M. Hussey, M. Sanderson
semanticscholar   +2 more sources

Modeling the date of leaf appearance in low‐arctic tundra

Global Change Biology, 2007
AbstractOne of the reported changes of arctic ecosystems in response to warming climate is the advance of the leaf appearance in spring. Such phenological changes play a role in the structural changes within tundra ecosystem communities. Recently, we developed a model that estimates the leaf appearance date for deciduous trees in taiga.
N. Delbart, G. Picard
semanticscholar   +4 more sources

Base Temperatures for Budbreak and Leaf Appearance of Grapevines

American Journal of Enology and Viticulture, 1989
Cuttings from 10 cultivars of Vitis vinifera L., one of Vitis labrusca , and one French hybrid were taken, after cessation of winter dormancy, from six vineyards into seven controlled temperature regimes with day/night temperatures of 10/5°C to 30/25°C ...
M. Moncur, K. Rattigan, D. Mackenzie, G. M. Intyre   +3 more
semanticscholar   +2 more sources

Contribution of Leaf Expansion, Rate of Leaf Appearance, and Stolon Branching to Growth of Plant Leaf Area under Water Deficit in White Clover

Crop Science, 1996
Response of white clover (Trifolium repens L.) leaf area to water deficit depends on three processes: individual leaf expansion, phytomer production, and stolon branching. We have evaluated these processes in five clones under a wide range of conditions.
Christine Belaygue, J. Wery, A. Cowan, F. Tardieu   +3 more
semanticscholar   +3 more sources

The Impact of Temperature on Leaf Appearance in Bambara Groundnut Landraces

Crop Science, 2003
Ten bambara groundnut [Vigna subterranea (L.) Verdc] landraces of diverse origin were used to examine the effect of temperature on the rate of leaf appearance (RLA) and to determine the base temperature (Tb) among landraces. Knowledge of leaf development is required in breeding programs where crop morphological development is considered an important ...
F. Massawe, S. Azam-Ali, Jeremy A Roberts   +2 more
semanticscholar   +2 more sources

Quantitative analysis of maize leaf collar appearance rates

Plant Physiology and Biochemistry, 2023
Phyllochron, the reciprocal of the leaf appearance rate, is a critical genetic parameter in crop models for predicting growth characteristics and yield. Previous studies have shown that existing observations and predictive algorithms do not adequately represent a broad range of cultivars and environments.
Honggen Xu, Bo Ming, Keru Wang, Jun Xue, Peng Hou, Shaokun Li, Ruizhi Xie   +6 more
openaire   +2 more sources

Rate of Leaf Appearance in Crimson Clover

Crop Science, 2002
Understanding factors that affect growth and development of crimson clover (Trifolium incarnatum L.) are important for the development of management practices to optimize forage utilization. In a 3‐yr field experiment at College Station, TX, we evaluated the effects of planting date on rate of leaf appearance of an intermediate‐ and late‐maturing ...
Twain J., Butler, Gerald W., Evers, Mark A., Hussey, Larry J., Ringer   +3 more
openaire   +2 more sources

Floral initiation, leaf initiation and leaf appearance in sunflower

Field Crops Research, 1993
Abstract This paper examines the hypothesis that leaf number visible at floral initiation (LN n ) and final leaf number (FLN) are correlated in sunflower ( Helianthus annuus L.). The relationship between these variables is described by a model that takes into account the rate of leaf primordium initiation (RPI), the rate of leaf appearance (RLA) and
V.O. Sadras, F.J. Villalobos
openaire   +1 more source

Leaf appearance rate of summer rape

Canadian Journal of Plant Science, 1991
Leaf appearance rate (LAR) is defined as the slope of the regression of leaf number on time of appearance. LARs were calculated for summer rape using both calendar days (CD) and growing degree days (GDD) as measurements of time. The relationship between the number of leaves and GDD or CD was linear.
M. J. Morrison, P. B. E. McVetty
openaire   +1 more source

Comparison of models to simulate leaf appearance in wheat

European Journal of Agronomy, 1995
Prediction on of leaf appearance in cereals is important for modelling canopy development and timing crop management practices. Four models which aim to predict leaf emergence on the basis of temperature and, in three cases, photoperiod are compared against independent data from a wide range of sites, sowing dates and cultivars of spring and winter ...
BINDI, MARCO, J. R. Porter, F. Miglietta
openaire   +2 more sources