HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Kelly, J. M. Articles by Henderson, G. S. Search for Related Content PubMed Articles by Kelly, J. M. Articles by Henderson, G. S. Agricola Articles by Kelly, J. M. Articles by Henderson, G. S.

Nutrient Flux in Litter and Surface Soil after Nitrogen and Phosphorus Fertilization¹

ABSTRACT

The effect of urea and concentrated superphosphate additions on the movement of N, P, K, and Ca from the litter and top 10 cm of the mineral soil via the soil solution was evaluated in an upland oak forest using tension lysimeters. The range in total flux values for each element over the study period were: N 24.8 to 1145.3; P 2.0 to 633.3; Ca 70.6 to 553.1; and K 49.5 to 94.0 kg/ha in response to various combinations of N and P fertilizer addition at levels of 0, 550, and 1100 kg/ha N and 0, 275, and 550 kg/ha P. Nitrogen fertilizer addition significantly increased the flux of N and K while reducing the flux of P and Ca. Phosphorus fertilizer addition significantly increased N, P Ca, and K fluxes. Solubilization of organic matter and the formation of insoluble calcium ammonium phosphate were important processes regulating the flux of N, P, Ca and K.

¹ Research supported by the U.S. Department of Energy under contract with the Union Carbide Corporation. Publication no. 1239, Enviromental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830.

² Biologist, Div. of Environ. Planning, TVA, Muscle Shoals, AL 35660, and Assoc. Prof., School of Forestry, Univ. of Missouri, Columbia, respectively. Research conducted while both authors were associated with Environ. Sci. Div., Oak Ridge National Laboratory.

Received for publication October 23, 1977. Accepted for publication July 25, 1978.