Solar Radiation Penetration and Distribution in Soybean Communities.

Isoda, Akihiro; Yoshimura, Takao; Ishikawa, Toshio; Nojima, Hiroshi; Takasaki, Yasuo

doi:10.1626/jcs.63.298

Cited by 13 publications

(4 citation statements)

References 17 publications

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“…Since leaf inclination angle is closely related to the plant light-intercepting capabilities, this has been one of the most important parameters for describing canopy geometry (Isoda et al, 1994;Chhina and Kler, 1997). However, it is a laborious task to measure the leaf inclination angle for growing plants in the fi eld.…”

mentioning

confidence: 99%

Estimating the Mean Leaf Inclination Angle of Wheat Canopies Using Reflected Polarized Light

Shibayama

Watanabe

2007

Plant Production Science

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mentioning

confidence: 99%

Estimating the Mean Leaf Inclination Angle of Wheat Canopies Using Reflected Polarized Light

Shibayama

Watanabe

2007

Plant Production Science

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“…43) In the case of a paddy field, the physical shielding of solar radiation by the canopy of rice leaves becomes more significant with the growth of rice plant, 46) and more shielding was measured after heading, with its extent also dependent on a solar zenith angle. 47,48) Since the photodegradation of pesticide in distilled water (DW) proceeds only via direct photolysis, the involvement of indirect photolysis in natural water can be conveniently evaluated when the light attenuation is minimal, by comparing k direct,p in DW and the observed k photo,p (Eq. 1).…”

Section: Photodegradation Of Pesticidementioning

confidence: 99%

Pesticide behavior in modified water-sediment systems

Katagi

2016

J. Pestic. Sci.

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The standardized laboratory water-sediment study in darkness is utilized as primary information on pesticide behavior to assess its ecotoxicological impacts in the edge-of-field water bodies. The half-lives of pesticide in water and sediment are key parameters to predict its environmental concentration, and its metabolic profiles help to avoid overlooking unexpected toxicological impacts from metabolites. However, no consideration of environmental factors such as sunlight and aquatic macrophytes is included, and this may lead to a conservative assessment. We review the experimental factors in the existing standardized design and then the effects of illumination and aquatic macrophytes introduced to the water-sediment system. The effects of temperature and the water-sediment ratio should be investigated in more detail and the pesticide behavior is possibly modified by illumination via photodegradation and/or metabolism in phototrophic microorganisms. Aquatic macrophytes play a major role as an additional sorption site and in further pesticide metabolism.

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“…Kokubun and Watanabe (1981) found that artificial raising of leaves increased light penetration into the canopy and improved yields under the low light intensity condition. Differences in canopy structure are evident among soybean cultivars, such as in the distribution of leaves inside the canopy (Isoda et al, 1994) and in leaflet size and orientation (Blad and Baker, 1972). A canopy with smaller leaves and a smaller leaf area in the upper canopy is advantageous for light transmission and distribution (Isoda et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

“…Differences in canopy structure are evident among soybean cultivars, such as in the distribution of leaves inside the canopy (Isoda et al, 1994) and in leaflet size and orientation (Blad and Baker, 1972). A canopy with smaller leaves and a smaller leaf area in the upper canopy is advantageous for light transmission and distribution (Isoda et al, 1994). Therefore, the broad, horizontal leaflets of 'Misato-zairai' may block light transmission and distribution and may be responsible for the unstable yields.…”

Section: Introductionmentioning

confidence: 99%