Formation and Loss of Humic Substances During Decomposition in a Pine Forest Floor

2003 ◽  
Vol 67 (3) ◽  
pp. 899 ◽  
Author(s):  
Robert G. Qualls ◽  
Akiko Takiyama ◽  
Robert L. Wershaw
Keyword(s):  
Humic Substances ◽  
Forest Floor ◽  
Pine Forest

Formation and Loss of Humic Substances During Decomposition in a Pine Forest Floor

2003 ◽  
Vol 67 (3) ◽  
pp. 899-909
Author(s):  
Robert G. Qualls ◽  
Akiko Takiyama ◽  
Robert L. Wershaw
Keyword(s):  
Humic Substances ◽  
Forest Floor ◽  
Pine Forest

Predicting Urea Hydrolysis in a Loblolly Pine Forest Floor

2014 ◽  
Vol 78 (6) ◽  
pp. 2071-2077
Author(s):  
David E. Kissel ◽  
Miguel L. Cabrera ◽  
Joseph Craig ◽  
Jiro Ariyama ◽  
Nicolas Vaio ◽  
...  
Keyword(s):  
Loblolly Pine ◽  
Forest Floor ◽  
Urea Hydrolysis ◽  
Pine Forest

Leaching of nutrient cations from the forest floor: effects of nitrogen saturation in two long-term manipulations

1999 ◽  
Vol 29 (5) ◽  
pp. 609-620 ◽  
Author(s):  
William S Currie ◽  
John D Aber ◽  
Charles T Driscoll
Keyword(s):  
Soil Solution ◽  
Forest Floor ◽  
Nitrogen Saturation ◽  
Pinus Resinosa ◽  
Pine Forest ◽  
Oak Forest ◽  
N Saturation ◽  
Harvard Forest ◽  
Negative Relationships

Nitrogen saturation results in greater mobility of nitrate, which in turn is often correlated with concentrations of nutrient cations in soil solution and streamwater. At the Harvard Forest, U.S.A., under long-term NH4NO3 inputs, a Pinus resinosa Ait. forest has exhibited signs of N saturation more rapidly than a mixed-Quercus forest. We test the hypothesis that increased nitrate leaching causes increased concentrations of nutrient cations in soil solution. Over 2 years (years 6 and 7 of treatment) we measured SO42-, NO3-, Cl-, Ca2+, K+, Mg2+, Na+, H+, and NH4+ in throughfall solution and in forest-floor (Oa) leachate. Concentrations of NO3- in forest-floor leachate increased with rates of N amendment and correlated positively with cation concentrations, with stronger overall correlations in the pine forest: r2 values were 0.51 (pine forest) and 0.39 (oak forest) for Ca2+, 0.45 (pine) and 0.16 (oak) for K+, and 0.62 (pine) and 0.50 (oak) for Mg2+. In summer and fall, the oak forest showed some negative relationships between nutrient cation leaching and rate of N amendment. These contrasts showed retention of cations and N to occur together in an N-limited system, whereas increased nitrate mobility occurred with increased cation losses in an N-saturated system.

scholarly journals Impact of elevated atmospheric CO2on forest floor respiration in a temperate pine forest

2004 ◽  
Vol 18 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Makoto Suwa ◽  
Gabriel G. Katul ◽  
Ram Oren ◽  
Jeff Andrews ◽  
Jeff Pippen ◽  
...  
Keyword(s):  
Forest Floor ◽  
Pine Forest

Thermal Conductivity of a Red Pine Forest Floor

1975 ◽  
Vol 39 (5) ◽  
pp. 973-978
Author(s):  
S. P. Pennypacker ◽  
W. E. Sopper ◽  
L. T. Kardos
Keyword(s):  
Thermal Conductivity ◽  
Forest Floor ◽  
Pine Forest ◽  
Red Pine

Nutrient Changes in Decomposing Loblolly Pine Forest Floor

1980 ◽  
Vol 44 (6) ◽  
pp. 1307-1314 ◽  
Author(s):  
J. R. Jorgensen ◽  
C. G. Wells ◽  
L. J. Metz
Keyword(s):  
Loblolly Pine ◽  
Forest Floor ◽  
Pine Forest ◽  
Nutrient Changes

scholarly journals Observations and Modeling of a Pine Forest Floor at L-Band

2009 ◽  
Vol 47 (7) ◽  
pp. 2024-2034 ◽  
Author(s):  
J.P. Grant ◽  
A.A. Van de Griend ◽  
M. Schwank ◽  
J.-P. Wigneron
Keyword(s):  
Forest Floor ◽  
Pine Forest ◽  
L Band

Input, accumulation, and residence times of carbon, nitrogen, and phosphorus in four Rocky Mountain coniferous forests

1989 ◽  
Vol 19 (4) ◽  
pp. 489-498 ◽  
Author(s):  
Cindy E. Prescott ◽  
John P. Corbin ◽  
Dennis Parkinson
Keyword(s):  
Forest Floor ◽  
Nutrient Use Efficiency ◽  
Rocky Mountain ◽  
Forest Litter ◽  
Pine Forest ◽  
Nutrient Concentrations ◽  
Residence Times ◽  
Nitrogen And Phosphorus ◽  
Species Composition Of Vegetation ◽  
Forest Floors

Annual aboveground litterfall in forests of Pinuscontorta Loud., Piceaglauca (Moench) Voss, Piceaengelmannii Parry ex Engelm., and Abieslasiocarpa (Hook.) Nutt. in southwestern Alberta ranged from 286 to 321 g•m−2•year−1. The mass of litter accumulated on the forest floors ranged from 6.3 to 11.0 kg•m−2. Residence times of organic matter in the forest floor were 11 years in a 90-year-old P. contorta stand, 16 years in a 120-year-old P. glauca–P. contorta stand, and 23 years in a 350-year-old P. engelmannii–A. lasiocarpa stand. Residence times of litter in the L layer of the forest floor were longer in a recently clearcut area than in the older forests. Residence times of individual nutrients in the forest floors were in the order N > P > C. Litter in the pine forest had lower concentrations of both N and P than did litter in the spruce–pine forest; litter in the spruce–fir forest had relatively high N and low P concentrations. Differences in nutrient concentrations of litter among sites reflected differences in the nutrient-use efficiency of the vegetation, suggesting that the species composition of vegetation is important in determining availability of nutrients in the floor of these forests.

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