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Slash Pine Response to Nitrogen and Phosphorus on Imperfectly Drained Soil of the West Gulf Coastal Plain
Author(s) -
McKee W. H.
Publication year - 1973
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1973.03615995003700050042x
Subject(s) - slash pine , nutrient , phosphorus , dry weight , slash (logging) , pinus <genus> , dry matter , zoology , coastal plain , nitrogen , human fertilization , agronomy , botany , chemistry , biology , ecology , organic chemistry
Total dry weight and nutrient content of 1‐year‐old slash pines ( Pinus elliottii var. elliottii Engelm.) responded to combinations of N and P in a pot study with imperfectly drained Coastal Plain soil. Application of either nutrient alone resulted in no growth response. A marked response was obtained with applications equivalent to 50 kg of P and 168 kg of N/ha. Maximum growth as determined by regression analysis was obtained with applications equivalent to 124 kg of P and 232 kg of N/ha. Uptake of individual nutrients increased with N and P levels, but response patterns differed. Nitrogen, calcium, and magnesium uptake corresponded closely to dry‐matter accumulation of seedlings, while P uptake was independent of dry weight. Percentage recovery of applied P decreased with increased P fertilization but improved with addition of N. Recovery of N increased with amount applied and was not affected by P.