Initial nitrogen content and topographic moisture effects on the decomposition of pine needles

Tsutomu Enoki, Hideyuki Kawaguchi

Research output: Contribution to journalArticle

Abstract

The effects of litter quality and site characteristics on the decomposition process were investigated using a litterbag method. Pine needle litters with differing nitrogen concentrations (0.8, 0.6 and 0.4%) were placed on the upper and lower slopes of a Pinus thunbergii Parl. plantation. After both 3 and 6 months, the mass of decomposing litter with the lower nitrogen concentration was larger than the litter with higher nitrogen concentrations. After 9 months, there were no significant differences in the litter mass remaining, regardless of the initial nitrogen concentration. Moisture content in the litter was always higher on the lower slope, although the mass of litter was smaller. Nitrogen concentration of the decomposing litter increased linearly with accumulated mass loss. The increase in nitrogen concentration of decomposing litter was greater on the lower slope, but this increase did not differ between initial nitrogen concentrations. The nitrogen release from the decomposing litter with higher initial nitrogen concentration was larger than the release from litter bags with lower nitrogen concentrations. This result suggests that there may be positive feedback between soil nutrient availability, litter quality and nutrient release from decomposing litter at the intraspecific level.
Original languageEnglish
Pages (from-to)425-434
JournalEcological Research
Volume15
Issue number4
DOIs
Publication statusPublished - Dec 2000

Fingerprint

conifer needles
nitrogen content
litter
moisture
decomposition
degradation
nitrogen
effect
Pinus thunbergii
nutrient availability
soil nutrients
bags
plantations
soil nutrient
water content
moisture content
plantation

Cite this

Initial nitrogen content and topographic moisture effects on the decomposition of pine needles. / Enoki, Tsutomu; Kawaguchi, Hideyuki.

In: Ecological Research, Vol. 15, No. 4, 12.2000, p. 425-434.

Research output: Contribution to journalArticle

@article{61ca69cfcd1c4b6e9a7d46d7ca03f0a7,
title = "Initial nitrogen content and topographic moisture effects on the decomposition of pine needles",
abstract = "The effects of litter quality and site characteristics on the decomposition process were investigated using a litterbag method. Pine needle litters with differing nitrogen concentrations (0.8, 0.6 and 0.4{\%}) were placed on the upper and lower slopes of a Pinus thunbergii Parl. plantation. After both 3 and 6 months, the mass of decomposing litter with the lower nitrogen concentration was larger than the litter with higher nitrogen concentrations. After 9 months, there were no significant differences in the litter mass remaining, regardless of the initial nitrogen concentration. Moisture content in the litter was always higher on the lower slope, although the mass of litter was smaller. Nitrogen concentration of the decomposing litter increased linearly with accumulated mass loss. The increase in nitrogen concentration of decomposing litter was greater on the lower slope, but this increase did not differ between initial nitrogen concentrations. The nitrogen release from the decomposing litter with higher initial nitrogen concentration was larger than the release from litter bags with lower nitrogen concentrations. This result suggests that there may be positive feedback between soil nutrient availability, litter quality and nutrient release from decomposing litter at the intraspecific level.",
author = "Tsutomu Enoki and Hideyuki Kawaguchi",
year = "2000",
month = "12",
doi = "10.1046/j.1440-1703.2000.00363.x",
language = "English",
volume = "15",
pages = "425--434",
journal = "Ecological Research",
issn = "0912-3814",
publisher = "Springer Japan",
number = "4",

}

TY - JOUR

T1 - Initial nitrogen content and topographic moisture effects on the decomposition of pine needles

AU - Enoki, Tsutomu

AU - Kawaguchi, Hideyuki

PY - 2000/12

Y1 - 2000/12

N2 - The effects of litter quality and site characteristics on the decomposition process were investigated using a litterbag method. Pine needle litters with differing nitrogen concentrations (0.8, 0.6 and 0.4%) were placed on the upper and lower slopes of a Pinus thunbergii Parl. plantation. After both 3 and 6 months, the mass of decomposing litter with the lower nitrogen concentration was larger than the litter with higher nitrogen concentrations. After 9 months, there were no significant differences in the litter mass remaining, regardless of the initial nitrogen concentration. Moisture content in the litter was always higher on the lower slope, although the mass of litter was smaller. Nitrogen concentration of the decomposing litter increased linearly with accumulated mass loss. The increase in nitrogen concentration of decomposing litter was greater on the lower slope, but this increase did not differ between initial nitrogen concentrations. The nitrogen release from the decomposing litter with higher initial nitrogen concentration was larger than the release from litter bags with lower nitrogen concentrations. This result suggests that there may be positive feedback between soil nutrient availability, litter quality and nutrient release from decomposing litter at the intraspecific level.

AB - The effects of litter quality and site characteristics on the decomposition process were investigated using a litterbag method. Pine needle litters with differing nitrogen concentrations (0.8, 0.6 and 0.4%) were placed on the upper and lower slopes of a Pinus thunbergii Parl. plantation. After both 3 and 6 months, the mass of decomposing litter with the lower nitrogen concentration was larger than the litter with higher nitrogen concentrations. After 9 months, there were no significant differences in the litter mass remaining, regardless of the initial nitrogen concentration. Moisture content in the litter was always higher on the lower slope, although the mass of litter was smaller. Nitrogen concentration of the decomposing litter increased linearly with accumulated mass loss. The increase in nitrogen concentration of decomposing litter was greater on the lower slope, but this increase did not differ between initial nitrogen concentrations. The nitrogen release from the decomposing litter with higher initial nitrogen concentration was larger than the release from litter bags with lower nitrogen concentrations. This result suggests that there may be positive feedback between soil nutrient availability, litter quality and nutrient release from decomposing litter at the intraspecific level.

U2 - 10.1046/j.1440-1703.2000.00363.x

DO - 10.1046/j.1440-1703.2000.00363.x

M3 - Article

VL - 15

SP - 425

EP - 434

JO - Ecological Research

JF - Ecological Research

SN - 0912-3814

IS - 4

ER -