scholarly journals Erratum to ‘Vertical structure heterogeneity in broadleaf forests: Effects on light interception and canopy photosynthesis’ Agricultural and Forest Meteorology, Volume 307, 15 September 2021, 108525

2021 ◽  
pp. 108637
Author(s):  
Martin Béland ◽  
Dennis D. Baldocchi
Keyword(s):  
Vertical Structure ◽  
Light Interception ◽  
Canopy Photosynthesis ◽  
Forest Meteorology ◽  
Structure Heterogeneity

Analysis of the regrowth of a tropical grass/legume sward subjected to different frequencies and intensities of defoliation

1980 ◽  
Vol 31 (4) ◽  
pp. 673 ◽  
Author(s):  
MM Ludlow ◽  
DA Charles-Edwards
Keyword(s):  
Leaf Area ◽  
Dry Matter ◽  
Dry Weight ◽  
Light Interception ◽  
Photosynthetic Characteristics ◽  
Dry Matter Production ◽  
Canopy Photosynthesis ◽  
Area Index ◽  
Matter Production ◽  
Cutting Height

Dry weight, leaf area, light interception and canopy photosynthesis were measured during 3- or 5-week regrowth periods of Setaria anceps/Desmodium intortum swards cut to 7.5 or 15 cm. Dry matter production during the experiment and over the growing season increased with cutting height and with interval between defoliations, but the proportion of grass to legume was unaffected. These effects of defoliation on dry matter production were similar to those estimated for integrated canopy photosynthesis from measured light interception and calculated leaf photosynthetic characteristics. Height and frequency of defoliation had no effect on canopy extinction coefficient for light, nor on the leaf photosynthetic characteristics, except for the first 1-2 weeks after defoliation when leaf photosynthetic rates appeared to be depressed. The main effects of height and frequency of defoliation on dry matter production were through their effects on leaf area index and light interception.

scholarly journals Effects of Flag Leaves and Panicles on Light Interception and Canopy Photosynthesis in High-Yielding Rice Cultivars

2002 ◽  
Vol 5 (4) ◽  
pp. 275-280 ◽  
Author(s):  
Kuniyuki Saitoh ◽  
Kouichiro Yonetani ◽  
Toshiaki Murota ◽  
Toshiro Kuroda
Keyword(s):  
Light Interception ◽  
Rice Cultivars ◽  
Canopy Photosynthesis ◽  
Flag Leaves

scholarly journals Forest vertical structure characterization using ground inventory data for the estimation of forest aboveground biomass

2016 ◽  
Vol 46 (1) ◽  
pp. 25-38 ◽  
Author(s):  
Astor Toraño Caicoya ◽  
Florian Kugler ◽  
Hans Pretzsch ◽  
Konstantinos Papathanassiou
Keyword(s):  
Aboveground Biomass ◽  
Vertical Structure ◽  
Forest Biomass ◽  
Correlation Factor ◽  
Structure Characterization ◽  
Inventory Data ◽  
Inversion Algorithm ◽  
Forest Density ◽  
Structure Heterogeneity ◽  
Mean Square Errors

A common method for estimating forest biomass is to measure forest height and apply allometric equations. However, changing forest density or structure heterogeneity increases the variability of the known allometric relationship. Here, we investigated the potential of allometric relationships based on vertical forest structure for biomass inversions with a global potential. First, vertical biomass profiles, which were calculated from ground forest inventory data, were used to model forest vertical structure. Then, a vertical structure ratio based on Legendre polynomials was proposed as a structural descriptor and its sensitivity to biomass was evaluated. Finally, we developed a structure-to-biomass inversion expression that could be extrapolated for aboveground biomass estimations. This is a case study based on inventory data from the Traunstein and Ebersberg test sites, two temperate forests located in southeastern Germany with different forest structural conditions. Results from the structure-to-biomass inversion algorithm show a clear improvement with respect to traditional height-to-biomass expressions, with increasing correlation factor (r2) from 0.52 to 0.73 for Traunstein and from 0.51 to 0.76 for Ebersberg and reducing the root mean square errors from 75.32 to 47.56 Mg·ha−1 and from 73.25 to 48.31 Mg·ha−1, respectively.

Possibility of Increasing Yield Potential of Rice by Reducing Panicle Height in the Canopy. I. Effects of Panicles on Light Interception and Canopy Photosynthesis.

1995 ◽  
Vol 22 (3) ◽  
pp. 441 ◽  
Author(s):  
TL Setter ◽  
EA Conocono ◽  
JA Egdane ◽  
MJ Kropff
Keyword(s):  
Oryza Sativa L ◽  
Dark Respiration ◽  
Grain Filling ◽  
Light Interception ◽  
Yield Potential ◽  
High Yield ◽  
Canopy Photosynthesis ◽  
Plant Type ◽  
Light Competition ◽  
Area Index

A new rice (Oryza sativa L.) plant type is proposed which is aimed at greater light interception by the leaves during grain filling and reduced susceptibility to lodging. This plant type is based on lowering panicle height in the canopy so that leaves are able to intercept more radiation. Panicle height of four cultivars with high yield potential ranged from 80 to 95% of canopy height at 14 days after flowering (DAF). Harvested panicle area index of two of these which were two tropical cultivars amounted to 0.45-0.57 m2 m-2, while the leaves above the panicles intercepted only 4-12% incident radiation at midday in these cultivars at 14 DAF. The potential impact of lowering panicle height in the canopy on canopy photosynthesis was evaluated by panicle removal. When panicles were removed, the irradiance at the bottom of the panicle layer of the canopy increased from 52 to 80%. At 11 DAF, net canopy photosynthesis of two cultivars similarly increased by 42-52% following removal of panicles. Increases in canopy photosynthesis were mainly due to increased light interception by leaves within the canopy since there were little or no changes in canopy dark respiration or in net leaf photosynthesis rates at the same irradiance following panicle removal. Optimum panicle height in the canopy and the effect of different panicle area index is further examined using a physiological model for light competition, INTERCOM. Reduced panicle height in the canopy is discussed in terms of considerations for and impacts of lowering panicle height in the canopy on canopy photosynthesis and yield of rice.

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