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Texas Panicum (Panicum texanum) Growth as Affected by Irrigation Management and Planting Date

Published online by Cambridge University Press:  12 June 2017

Jill Schroeder ,
Clyde C. Dowler  and
James R. Stansell
Jill Schroeder
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Coastal Plain Exp. Stn., Tifton, GA 31793
Clyde C. Dowler
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Coastal Plain Exp. Stn., Tifton, GA 31793
James R. Stansell
Affiliation:
Univ. Georgia, Agric. Eng. Dep., Coastal Plain Exp. Stn., Tifton, GA 31793
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Abstract

The effect of soil matric potential from −0.02 to <–1.5 MPa on Texas panicum growth in drainage lysimeters covered by an automatic rainfall shelter was measured in 1984, 1985, and 1986. Rate of tiller production was faster for plants established in April than June in 1984 and 1985, but not 1986. In 1985 and 1986, dry weight was greater, but total seed production was less for plants established in April than June. Irrigation when the soil matric potential was −0.02, −0.075, or −1.5 MPa did not affect rate of tiller production in 1984. Irrigation when the soil matric potential was −1.5 MPa decreased dry weight of plants but increased seed number per panicle compared to irrigation when the soil matric potential was −0.02 MPa in 1985 and 1986. Plants grown in lysimeters irrigated at soil matric potential <–1.5 MPa in 1985 and 1986 did not wilt at 8:00 a.m.; therefore, they were not watered after establishment. These nonirrigated plants averaged 0.9 and 0.4 kg dry weight and produced 92 200 and 16 100 seeds in 1985 and 1986, respectively.

Keywords

Texas panicumPanicum texanum Buckl. # PANTEIrrigation schedulingweed biologyrainfall sheltersdrainage lysimeterPANTE
Type
Weed Biology and Ecology
Information
Weed Science , Volume 38 , Issue 4-5 , September 1990 , pp. 374 - 378
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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