Results 261 to 270 of about 309,576 (290)

Effect of nitrogen supply on leaf appearance, leaf growth, leaf nitrogen economy and photosynthetic capacity in maize (Zea mays L.)

Field Crops Research, 2005
Leaf area growth and nitrogen concentration per unit leaf area, N-a (g m(-2) N) are two options plants can use to adapt to nitrogen limitation. Previous work indicated that potato (Solanum tuberosum L.) adapts the size of leaves to maintain Na and photosynthetic capacity per unit leaf area.
Vos, J., van der Putten, P.E.L., Birch, C.J.   +2 more
exaly   +4 more sources

Relationships between internode elongation, plant height and leaf appearance in maize

Field Crops Research, 1994
Abstract Two field studies were undertaken to formulate relationships between leaf appearance, leaf height and plant height in maize which could be used in models of light competition in intercropping systems. In the first study a single hybrid was subjected to three water-stress treatments: mild stress, severe stress and well-watered conditions ...
exaly   +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

Simulating Leaf Appearance in Rice

Agronomy Journal, 2008
Most rice (Oryza sativa L.) simulation models assume that only temperature affects leaf appearance rate (LAR). This assumption ignores results from controlled environment studies that show that LAR in rice is not constant with time (calendar days) under constant temperature.
Nereu Augusto Streck, Leosane Cristina Bosco, Isabel Lago   +2 more
openaire   +1 more source

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 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. A. Van Esbroeck, M. A. Hussey, M. A. Sanderson   +2 more
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

Daylength change and leaf appearance in winter wheat

Plant, Cell and Environment, 1980
Abstract In the field successive leaves of winter wheat appear at a rate which varies because it depends strongly upon temperature. When plotted against ‘thermal time’, however (temperature accumulated above a fixed base of 0°C), leaf appearance was a strictly linear function of temperature.
C. K. BAKER, J. N. GALLAGHER, J. L. MONTEITH   +2 more
openaire   +1 more source

Leaf appearance and senescence patterns of some pasture species

Grass and Forage Science, 1995
AbstractFive pasture species, very different in their morphological organization (four dicotyledons: Plantago lanceolata, Sanguisorba minor, Ranunculus repens, Taraxacum officinalis and one grass: Dactylis glomerata), were grown as spaced plants in pots, thus excluding competition for light, to study the proportion of senescent leaves.
Calvière, I., Duru, Michel
openaire   +2 more sources