Radiation use efficiency and shoot:root dry matter partitioning in seedling growths and regrowth crops of lucerne (Medicago sativa L.) after spring and autumn sowings

2011 ◽  
Vol 35 (4) ◽  
pp. 255-268 ◽  
Author(s):  
Pascal Thiébeau ◽  
Nicolas Beaudoin ◽  
Eric Justes ◽  
Jean-Michel Allirand ◽  
Gilles Lemaire
Keyword(s):  
Medicago Sativa ◽  
Dry Matter ◽  
Radiation Use Efficiency ◽  
Dry Matter Partitioning ◽  
Use Efficiency ◽  
Medicago Sativa L ◽  
Radiation Use

Yield components, light interception and radiation use efficiency of lucerne (Medicago sativa L.) in response to row spacing

2013 ◽  
Vol 45 ◽  
pp. 87-95 ◽  
Author(s):  
Juan Mattera ◽  
Luis A. Romero ◽  
Alejandra L. Cuatrín ◽  
Patricia S. Cornaglia ◽  
Agustín A. Grimoldi
Keyword(s):  
Medicago Sativa ◽  
Yield Components ◽  
Light Interception ◽  
Radiation Use Efficiency ◽  
Row Spacing ◽  
Use Efficiency ◽  
Medicago Sativa L ◽  
Radiation Use

Recovery dynamics of rainfed winter wheat after livestock grazing 2. Light interception, radiation-use efficiency and dry-matter partitioning

2011 ◽  
Vol 62 (11) ◽  
pp. 960 ◽  
Author(s):  
Matthew T. Harrison ◽  
John R. Evans ◽  
Hugh Dove ◽  
Andrew D. Moore
Keyword(s):  
Winter Wheat ◽  
Dry Matter ◽  
Light Interception ◽  
Livestock Grazing ◽  
Radiation Use Efficiency ◽  
Dry Matter Accumulation ◽  
Dry Matter Partitioning ◽  
Grain Yields ◽  
Use Efficiency ◽  
Radiation Use

Grazing of cereal crops reduces canopy light interception and could potentially reduce biomass production and grain yields. Alternatively, defoliation after canopy closure may increase light penetration and enhance radiation-use efficiency (RUE, shoot dry matter produced per unit light intercepted). Changes in dry matter partitioning following grazing may also ameliorate grain yield penalties. Experiments with rainfed winter wheat were conducted near Canberra, Australia, to investigate the effect of different intensity or duration of grazing on two cultivars. Grazing reduced leaf area index (LAI), light interception and growth rates by up to 90% but did not affect overall RUE. Although grazing caused significant reductions in cumulative light interception and total dry matter accumulation, it did not affect grain yields because grazed crops had delayed phenological development, allowing increased partitioning of shoot dry matter to spikes. Grazing reduced stem dry matter accumulation and consequently decreased the amount of stem assimilate available for retranslocation to kernels by up to 75%. However, by delaying crop ontogeny, grazing prolonged green area duration after anthesis and thereby increased the supply of assimilates from current photosynthesis to developing kernels, mitigating potential yield penalties caused by defoliation.

Single Leaf Carbon Exchange and Canopy Radiation Use Efficiency of Four Peanut Cultivars1

1993 ◽  
Vol 20 (1) ◽  
pp. 1-5 ◽  
Author(s):  
J. M. Bennett ◽  
T. R. Sinclair ◽  
Li Ma ◽  
K. J. Boote
Keyword(s):  
Solar Radiation ◽  
Dry Matter ◽  
Radiation Use Efficiency ◽  
Dry Matter Accumulation ◽  
Radiation Interception ◽  
Single Leaf ◽  
Seed Harvest ◽  
Use Efficiency ◽  
Total Crop ◽  
Radiation Use

Abstract Knowledge of the interception of solar radiation by crop canopies and the use of that radiation for carbon assimilation is essential for understanding crop growth and yield as a function of the environment. A field experiment was conducted in 1990 at Gainesville, FL to determine if differences in single leaf carbon exchange rate (CER), canopy radiation interception, radiation use efficiency (g dry matter produced per unit of solar radiation intercepted), and increase in seed harvest index with time exist among several commonly grown peanut (Arachis hypogaea L.) cultivars. Four cultivars (Early Bunch, Florunner, Marc I, and Southern Runner) were grown in field plots on a Kendrick fine sand (a loamy, siliceous, hyperthermic Arenic Paleudult) under fully irrigated, intensive management. Total crop and seed dry matter accumulation were determined, and canopy radiation interception measured at weekly intervals. CER of uppermost, fully expanded sunlit leaves were determined at midday at 2-wk intervals. Single leaf CER's were similar among cultivars (25 to 35 μmol CO2 m-2 s-1) and relatively stable throughout most of the season, before declining during late seed filling. Although interception of radiation differed somewhat among cultivars during early canopy development, total crop dry matter accumulation was linearly related to the cumulative amount of radiation intercepted by all four cultivars (r2=≥0.99). Radiation use efficiency was similar among all cultivars with a mean of 1.00 g dry matter accumulated per MJ of intercepted solar radiation. The increase in seed harvest index with time was linear (r2≤0.94) and the rates of increase were similar among the Early Bunch, Florunner, and Marc I cultivars (0.0058 d-1), but lower (0.0043 d-1) for the later maturing Southern Runner cultivar. Results from this study indicated that the primary differences among these four cultivars were in early-season development of the leaf canopy and resultant radiation interception and the rate of seed growth, rather than the capacity to assimilate carbon dioxide.

Effect of rice straw biochar and irrigation on growth, dry matter yield and radiation‐use efficiency of maize grown on an Acrisol in Ghana

2019 ◽  
Vol 206 (2) ◽  
pp. 296-307 ◽  
Author(s):  
Eric Oppong Danso ◽  
Adam Yakubu ◽  
Emmanuel Arthur ◽  
Edward B. Sabi ◽  
Stephen Abenney‐Mickson ◽  
...  
Keyword(s):  
Rice Straw ◽  
Dry Matter ◽  
Radiation Use Efficiency ◽  
Dry Matter Yield ◽  
Rice Straw Biochar ◽  
Use Efficiency ◽  
Radiation Use
Sign in / Sign up

Export Citation Format

Share Document