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https://doi.org/10.1007/s11676-016-0279-1

has been cited by the following article:

• TITLE: Grain Yield Differences of Soybean Cultivars Due to Solar Radiation Interception

  AUTHORS: Mariele Müller, Miroslava Rakocevic, Andréia Caverzan, Geraldo Chavarria

  KEYWORDS: Glycine Max, Leaf Area Index, Efficiency of Solar Radiation Interception, Extinction Coefficient, Solar Radiation Use Efficiency

  JOURNAL NAME: American Journal of Plant Sciences, Vol.8 No.11, October 26, 2017

  ABSTRACT: Soybean [Glycine max (L.) Merr.] growth rate and grain yield are modified by the interception and solar radiation use efficiency. Thus, it is desirable that the most of plant photosynthetic structures intercepting solar radiation in order to have increment in carbon fixation and reflection on growth and yield. The goal of this study was to assess if soybean cultivars differ in grain yield in relation to solar radiation interception. Four soybean cultivars were evaluated at stages V6, V9, R2, R4, R6 and R8. To determine the photosynthetically active radiation interception by the canopy, the plants were divided into two parts (upper and lower strata). For grain yield components, the plants were divided into three parts (upper, middle and lower thirds). Of the photosynthetically active radiation intercepted by the vegetative canopy at the reproductive stages, the maximum observed intercept was 5.2% in the lower stratum of the plants. The number of infertile nodes increased in the lower third of plants due to low interception of solar radiation in this plant region. Thus, the soybean cultivars more efficient in intercepting photosynthetically active radiation inside the vegetative canopy showed higher grain yields.