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FURTHER NOTES ON THE NUTRIENT REQUIREMENTS AND THE HISTOLOGY OF THE CRANBERRY, WITH SPECIAL REFERENCE TO THE SOURCES OF NITROGEN

1932; Oxford University Press; Volume: 7; Issue: 4 Linguagem: Inglês

10.1104/pp.7.4.643

1532-2548

Ruth M. Addoms, F. C. Mounce,

Seedling growth and survival studies

A project concerned with the nutrient requirements and the histology of the cranberry (Vaccinium macrocarpon Ait.) has been in progress at the New Jersey Agricultural Experiment Station for two years. Preliminary experiments (1) showed that the cranberry plant is capable of utilizing ammonium nitrogen. After these experiments were initiated, Tied jens and Robbins (12) showed that for tomato and certain other crop plants either ammonium or nitrate was a favorable source of nitrogen, but that the ability of the plants to utilize these different sources of nitrogen varied with the hydrogen-ion concentration of the nutrient medium, nitrate being superior to ammonium in a decidedly acid nutrient solution (pH 4 or 5) whereas ammonium was superior to nitrate in a neutral or slightly alkaline solution (pH 7 and above). The present investigation was therefore undertaken with the special object of determining the ability of the cranberry plant to utilize different sources of nitrogen at various hydrogenion concentrations. The problem is of practical importance since cranberries are grown commercially in bog soils of high acidity.