Eight Years of Herbicide and Nitrogen Fertilizer Treatments on Kentucky Bluegrass (Poa pratensis) Turf
| Autor: | J. Jack Murray, Ralph G. Nash, Dayton L. Klingman, Edwin A. Woolson |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
0106 biological sciences
Poa pratensis Digitaria Dandelion 04 agricultural and veterinary sciences Plant Science engineering.material Biology biology.organism_classification 01 natural sciences 010602 entomology Nitrogen fertilizer Taraxacum officinale Agronomy Quality rating Soil water 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries Fertilizer Agronomy and Crop Science |
| Zdroj: | Weed Science. 31:825-831 |
| ISSN: | 1550-2759 0043-1745 |
| DOI: | 10.1017/s0043174500070818 |
| Popis: | Annual applications of three nitrogen (N) rates, two broadleaf herbicides, and six annual-grass herbicides in Kentucky bluegrass (Poa pratensisL.) turf were made from 1974 to 1981. With each increment increase in N (2, 4, and 6 kg N/200 m2), the percentage cover of crabgrass (Digitariaspp.) and number of common dandelion (Taraxacum officinaleWeber # TAROF) plants were reduced when compared with the next lower rate. There was an interaction between crabgrass control by the annual-grass herbicides and fertilizer rates. When highly effective herbicides were used, there were no differences in crabgrass control related to N rate. When less effective herbicides or no annual-grass herbicides were used, there were great changes directly related to N rate. Each increment of increased N rate increased the turf quality rating. The broadleaf herbicides resulted in differential quality ratings, although differences were relatively small. Highest quality ratings were for plots treated with the three most effective annual-grass herbicides. Residues in the ppb range of some herbicides were detected in soils sampled about a year after the eighth annual herbicide treatments, but residues were below the phytotoxic level and therefore would have had no effect on control of weeds. |
| Databáze: | OpenAIRE |
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