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Radiation absorption and growth of Viciafaba under shade at two densities
Author(s) -
KASIM K.,
DENNETT M. D.
Publication year - 1986
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1986.tb03221.x
Subject(s) - shading , dry matter , biology , absorption (acoustics) , botany , horticulture , agronomy , zoology , optics , physics , art , visual arts
SUMMARY Faba beans were grown under various shading treatments at densities of 20 and 60 plants m ‐2 . The amount of PAR absorbed by each treatment was estimated from measured leaf area index. The conversion factor (E, g MJ ‐1 ) relating dry matter production to absorbed PAR increased as shading increased. Application or removal of shade changed E rapidly, though there was some evidence for an increased value of ɛ persisting after removal of shade. Differences in dry matter production between the two years were due to as much to differences in ɛ as to changes in the amount of light absorbed. Increased plant density increased PAR absorbed but hardly affected e.