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Soil Temperature, Soil Moisture, and Seed Burial Depth Effects on Redstem Filaree (Erodium cicutarium) Emergence

Published online by Cambridge University Press:  12 June 2017

Robert E. Blackshaw
Robert E. Blackshaw*
Affiliation:
Agric. Can. Res. Stn., Lethbridge, AB, Canada T1J 4B1. Contribution No. 3879103
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Abstract

A study was conducted under controlled environmental conditions to determine the effect of soil temperature, soil moisture, and depth of seed burial on the emergence of redstem filaree. Emergence occurred from 5 to 30 C but was optimal at 5 to 15 C. Redstem filaree emergence was optimal in moist soil with water contents of −0.03 to −0.28 MPa. Emergence progressively decreased as soil moisture was lowered below these levels, with less than 25% emergence attained at −1.53 MPa regardless of soil temperature. Almost no germination was observed in warm (30 C), dry (-1.03 to −1.53 MPa) soils. Rate of emergence was affected more by soil temperature than by moisture. A decrease in temperature from 20 to 5 C increased the time to reach 50% emergence by 6 to 8 d but a decrease in soil moisture from −0.03 to −1.53 MPa increased the time to reach 50% emergence by only 1 to 2 d. Emergence was greatest at soil depths of 1 cm or less. No emergence occurred at depths of 8 cm or below.

Keywords

Redstem filareeErodium cicutarium (L.) L'Her. ex Ait. #3 EROCIWeed biologygerminationplanting depth
Type
Weed Biology and Ecology
Information
Weed Science , Volume 40 , Issue 2 , June 1992 , pp. 204 - 207
Copyright
Copyright © 1992 by the Weed Science Society of America 

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References

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