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Effect of Depth and Duration of Seed Burial on Kochia (Kochia scoparia)

Published online by Cambridge University Press:  12 June 2017

Paul S. Zorner ,
Robert L. Zimdahl  and
Edward E. Schweizer
Paul S. Zorner
Affiliation:
Dow Chemical Co., Walnut Creek, CA
Robert L. Zimdahl
Affiliation:
Dep. Bot. Plant Path., Colorado State Univ.
Edward E. Schweizer
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric. Crops Res. Lab., Colorado State Univ., Fort Collins, CO 80523
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Abstract

Dormant and nondormant kochia [Kochia scoparia (L.) Schrad. ♯3 KCHSC] seed populations were buried at six soil depths in Colorado. Portions of both populations remained viable for 36 months. Persistence increased with burial depth in both populations. Seed loss from the initially dormant population was limited to germination in situ, but seed loss from the initially nondormant population included significant viability loss at burial depths of 10 cm or less. Persistence of both populations was regulated by dormancy retention. Shallow tillage practices are predicted to decrease seed persistence in soil and increase successful seedling emergence. Deep tillage practices are predicted to reduce seedling emergence but increase soil seed populations.

Keywords

Dormancyseed persistenceKCHSC
Type
Weed Biology and Ecology
Information
Weed Science , Volume 32 , Issue 5 , September 1984 , pp. 602 - 607
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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