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Effects of defoliation at different growth stages and in different grain‐filling environments on the growth and yield of spring barley
Author(s) -
JENKYN J. F.,
ANILKUMAR T. B.
Publication year - 1990
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.1744-7348.1990.tb06642.x
Subject(s) - biology , agronomy , yield (engineering) , spring (device) , grain yield , flag (linear algebra) , horticulture , mathematics , mechanical engineering , materials science , pure mathematics , engineering , metallurgy , algebra over a field
Summary The yield of spring barley grown outside was little affected by the removal of all fully expanded leaves during late tillering or early stem extension but was decreased by defoliation either earlier or later. Removal of all except the top two leaves when 50% of the ears were fully emerged also had relatively little effect on yield but damage was increased if only the flag leaf was retained, especially if the leaves apart from the flag leaf were removed 10 days earlier when the first awns were visible. Defoliation treatments, including those which had little effect on barley grown outside, generally had proportionately greater effects if the plants were moved to a warm glasshouse at the start of grain filling.