Senescence and yield of calcium-sprayed and depodded soybean [Glycine max (L.) Merr.]

Abstract

Leaf senescence may limit crop productivity by restricting the period of seed development. Postponing the onset or slowing down the rate of senescence may be one way of increasing yield in soybean [Glycine max (L.) Merr.]. Soybean plants were subjected to foliar sprays of calcium and pod removal to determine if these treatments could alter the senescence pattern and thereby improve seed yield. Calcium delayed leaf senescence in podded as well as partially depodded plants by 10 d. However, it did not significantly increase seed yield. Calcium promoted regrowth and reversed the senescence of both podded and depodded plants. Pod removal by itself had no effect on the initiation of leaf senescence. Early pod removal did not affect yield but late pod removal reduced it. Although late pod removal increased seed size, the increase was small and did not contribute much to total seed yield.

Source or Periodical Title

Philippine Agricultural Scientist

ISSN

317454

Page

106-113

Document Type

Article

Subject

Calcium, Pod removal, Senescence, Sink strength, Soybean

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