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| Publication Type:
| Refereed |
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| Author(s): | Pierce, Gary L.;
Warren, Stuart L.;
Mikkelsen, Robert L.;
Linker, H. Michael |
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| Author Affiliation: | Pierce: Graduate Research Assistant; and Warren: Professor, Department of Horticultural Science; Mikkelsen: Associate Professor, Department of Soil Science; and Linker: Professor, Department of Crop Science, North Carolina State University |
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| Title: | Effects of soil calcium and pH on seed germination and subsequent growth of large crabgrass (Digitaria sanguinalis) |
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| Source: | Weed Technology. Vol. 13, No. 2, April-June 1999, p. 421-424. |
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| Publishing Information: | Champaign, IL: Weed Science Society of America. |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Calcium; Soil pH; Germination; Growth; Digitaria sanguinalis; Crabgrass control; Soil amendments; Calcium carbonate; Magnesium carbonate; Calcium sulfate; Dry weight; Shoot growth; Root growth; Nutrient availability; Application rates; Root-shoot ratio; Weed control
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| Abstract/Contents: | "Large crabgrass is a problem weed in horticultural crops. particularly in turfgrass in the southeastern United States. If growth of large crabgrass could be suppressed via soil pH or calcium levels, control of this weed in turfgrass might be improved while minimizing herbicide usage. To determine the effect of soil calcium and pH on germinations and growth of large crabgrass, seeds were sown in a loamy sand soil amended with calcium carbonate (CaCOā) or magnesium carbonate (MgCOā) that established a range of soil pH from 4.8 to 7.8. Seeds were also sown in soil amended similarly with calcium sulfate (CaSOā), which does not affect pH, that established a range of exchangeable Ca levels corresponding to the Ca range in CaCOā, from pH 4.8 to 7.8. Seed germinations of large crabgrass was unaffected by pH when soil was amended with CaCOā, whereas seed germination decreased with increasing pH when soil was amended with MgCOā. Crabgrass germination was not affected by Ca (CaSOā“) independent of pH changes. Increasing soil pH reduced shoot and root dry weights of seedlings regardless of material used to raise pH. Maximum shoot dry weights occurred at pH 4.8 in the unamended soil, whereas maximum root dry weights occurred at ranges from pH 5.8 to 6.3 for CaCOā, and pH 5.3 to 5.8 for MgCOā. Shoot and root dry weights were not affected by Ca when soil was amended at with CaSOā. By raising soil pH levels, the growth of large crabgrass and its ability to compete with turfgrass may be reduced. Raising exchangeable Ca does not appear to be an effective management tool for control of this weed species." |
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| Language: | English |
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| References: | 22 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Pierce, G. L., S. L. Warren, R. L. Mikkelsen, and H. M. Linker. 1999. Effects of soil calcium and pH on seed germination and subsequent growth of large crabgrass (Digitaria sanguinalis). Weed Technol. 13(2):p. 421-424. |
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MSU catalog number: SB 610 .W44 |
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