Abstract
AbstractThe effect of various eradicants and fertilizers used in nursery practice on the oxygen uptake of excised root tips of seedlings of jack pine, red pine, white pine, and black locust seedlings was investigated using manometric techniques. The compounds studied included calomel, spergon, thiosan, chlordane, Stoddard oil, and common fertilizer salts applied at ordinary rates. In the first phase of the study the root tips were placed directly into solutions or suspensions of various compounds and their rate of oxygen uptake determined. The second phase was concerned with the respiration of root tips of seedlings grown in cultures treated with the chemicals. The measurements show that some of the compounds applied to nursery soils are inhibitory to the metabolism of roots of young seedlings. The results also indicate that manometric methods of analysis provide a useful tool for the evaluation of the effect of various chemical compounds used in current nursery practice.
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