Effects of light, nitrogen, and phosphorus on red pine seedling growth and nutrient use efficiency
1994
Elliott, K.J. | White, A.S.
Growth and nutrient use efficiency were determined for red pine (Pinus resinosa Ait.) seedlings grown at various levels of light, nitrogen, and phosphorus. Nutrient use efficiency was estimated for nitrogen (NUE) and phosphorus (PUE) and was calculated as biomass production divided by total nutrient content. Seedlings grown in high fight had four to five times more biomass than those in the low fight treatment. Nitrogen supply had a significant effect on total biomass as well as other biomass components. Phosphorus supply did not have a significant effect on any of the biomass components. NUE and PUE decreased with increased supply of N and P, respectively. The results of this study suggest that red pine seedlings can adjust their nutrient use efficiency, particularly for N, when fight and nutrient availability are varied. NUE was highest with high fight and low N-high P supply in nutrient solutions.
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