Decomposition of Organic Matter on the Forest Floor of Pinus Radiata Plantations

Lamb, D. R.

doi:10.1111/j.1365-2389.1976.tb01991.x

Cited by 16 publications

(7 citation statements)

References 11 publications

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“…Attempts were made to determine whether or not the change from fixed to roving collectors MJJASONDJFMAMJ JASONDJFMAMJ J 19751976 FIG. 1.…”

Section: Resultsmentioning

confidence: 99%

“…Florence and Lamb (Florence & Lamb 1974Lamb 1975Lamb , 1976) have studied litter decomposition in P. radiata plantations in South Australia, Lewis & Harding (1963) studied certain chemical properties of the surface 10 cm of soil and found no obvious differences between eucalypt and first and second rotation P. radiata in South Australia, Waring (1968) found less nitrogen in the surface soil beneath P. elliottii than beneath eucalypts in coastal N.S.W. However, Richards (1962) found increased nitrogen available in the soil under P. elliottii and P. taeda in Queensland, Hamilton (1965) found that the surface 2,5 cm of soil under P. radiata near Canberra contained less organic matter," nitrogen, phosphorus, and exchangeable cations than did the soil under eucalypts in drier sites; few changes were observed for pines planted in wetter sites.…”

Section: Introductionmentioning

confidence: 98%

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Nutrient movement into soils beneath eucalypt and exotic conifer forests in southern central Victoria

Feller¹

1978

Austral Ecol

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Above-ground nutrient return to the soil was estimated by studying forest floor leachates for up to 2 years in two eucalypt forests (Eucalyptus obliqua and E. regnans) and two nearby conifer plantations (Pinus radiata and Pseudotsuga menziesii) near Narbethong in southern central Victoria. Forest floor leachate volumes were recorded approximately once a month and samples were analysed for pH and potassium, sodium, magnesium, and calcium concentrations.The volume of forest floor leachate was greater in the eucalypts than in the conifers. This was attributed to greater interception losses of water by the conifers.Forest floor leachate chemistry underwent regular seasonal fluctuations which were similar for each of the four forest types. Acidity was highest in spring and autumn and lowest in summer. Cation concentrations were highest in autumn and lowest in spring. This behaviour was attributed to changes in climate and in rates of litter decomposition.In contrast to cation concentrations, cation quantities entering the soil in forest floor leachate showed no pronounced seasonal variations although they tended to be high in winter. The quantities of cations added to the soil in forest floor leachate varied with forest type, and were significantly higher in E. obliqua than in the comparable P. radiata stand. Greater quantities of acid were added to the soil under P. radiata.The P. radiata soil contained lower quantities of exchangeable cations than the E. obliqua soil. This was consistent with the 0307-692X/78/1200-0357 $02.00 © 1978 Blackwell observed differences in forest floor leachate chemistry. Unlike the P. radiata soil, the P. menziesii soil did not appear to be depleted in exchangeable cations.It was concluded that P. radiata had depleted the exchangeable cation reserves in the soil studied but that the full significance of this is still unknown.

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“…Attempts were made to determine whether or not the change from fixed to roving collectors MJJASONDJFMAMJ JASONDJFMAMJ J 19751976 FIG. 1.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Nutrient movement into soils beneath eucalypt and exotic conifer forests in southern central Victoria

Feller¹

1978

Austral Ecol

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“…In contrast, in plots where nutrients were applied, rates of decomposition of litter and soil carbon were slowed. It has been shown that litter with high nitrogen concentrations has proportionally lower decomposition rates (Lamb 1976;Berg 1986;Wienand and Stock 1995). Thus, the fastest rates of decomposition of litter and soil carbon were in the plot receiving water only (I treatment).…”

Section: Biology Of Forest Growth (Bfg)mentioning

confidence: 99%

Calibration of the RothC model to turnover of soil carbon under eucalypts and pines

Paul

Polglase

2004

Soil Res.

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The FullCAM model was developed for full carbon accounting in agriculture and forests at project and national scales. For forest systems, FullCAM links the empirical CAMFor model to models of tree growth (3PG), litter decomposition (GENDEC), and soil carbon turnover (RothC). Our objective was to calibrate RothC within the FullCAM framework using 2 long-term forestry experiments where productivity had been manipulated and archived and new soil samples were available for analysis of carbon within the various pools described by RothC. Inputs of carbon to soil at these trials were estimated by calibrating FullCAM to temporal data on above-ground growth, litterfall, and accumulation of litter. Two alternative submodels are available in FullCAM (CAMFor and GENDEC) for predicting decomposition of litter, and thus the input of carbon into the soil. Calibration of RothC was most sensitive to the partitioning of carbon during decomposition of debris between that lost as CO 2 and that transferred to soil. Turnover of soil carbon was best simulated when the proportion of carbon lost to CO 2 from relatively labile pools of debris was 77% (when simulated by CAMFor) and 95% (when simulated by GENDEC), whereas resistant pools of debris lost about 40% to CO 2 during decomposition. Although rates of decomposition of pools of soil carbon were originally developed in RothC for agricultural soils, these constants were found to be also suitable for soils under plantation systems.

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“…Second, clay content of the surface mineral soil was unusually high in these stands (over 20% of < 2 mm fraction). Florence and Lamb (1974) reported high variation in forest floor accumulation among several P. radiata stands in South Australia, and Lamb (1976) attributed this variation partly to the influence of mineral soil characteristics on humus formation and decomposition.…”

Section: Dynamics Of Nonwoody Detritusmentioning

confidence: 99%

Nutrient Dynamics of Aboveground Detritus in Lodgepole Pine (Pinus contorta ssp. latifolia) Ecosystems, Southeastern Wyoming

Fahey¹

1983

Ecological Monographs

177

104

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Storage and fluxes on N, P, Ca, Mg, and K in aboveground detritus were measured in six contrasting lodgepole pine (Pinus contorta ssp. latifolia) stands in southeastern Wyoming. Litterfall was predominantly leaves (67—80%) in 80—100 yr old stands, while woody litter was more important in an older stand (240 yr old). Leaf litter nutrient concentrations were very low compared with other pine forests, particularly for N (0.40% dry mass). Dry mass loss from decomposing leaf litter was slow (15%/yr in first 2 yr), and summer rates did not differ significantly from winter rates beneath the insulating snowpack. Significant amounts of N, P, and Ca were added to decomposing leaves during the first winter, and N and Ca addition continued for 2 yr. Potassium and magnesium were rapidly lost from decomposing leaves. Rates of mass and nutrient loss from decomposing bark, twigs, and cones were comparable to those observed in other studies of temperate—zone forests. Mass loss from decaying bole wood appeared to be exponential through 40 yr, with an average decay coefficient (k) of 0.016, which is comparable to that in other cold temperate forests. Nitrogen content of decaying boles doubled between 30 and 55 yr following tree death, while smaller additions of P, Ca, K, and Mg also were noted. Relatively large accumulations of organic matter and nutrients were observed in the forest floor, leading to very high steady—state residence times for dry mass (mean = 18 yr), N (54 yr), P (39 yr), Ca (35 yr), Mg (21 yr), and K (18 yr). Deadfall contributed by the present forest generation was a minor component of the aboveground detritus except in an old—age stand and in a dense, self—thinning forest site. In contrast, dead wood inherited from the previous forest generation (killed by fire) was a major detrital storage component, exceeding forest floor mass by several—fold in 80—100 yr old stands. High nutrient immobilization in the dead wood led to storage values which were similar to those of the forest floor in these stands.

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Decomposition of Organic Matter on the Forest Floor of Pinus Radiata Plantations

Cited by 16 publications

References 11 publications

Nutrient movement into soils beneath eucalypt and exotic conifer forests in southern central Victoria

Nutrient movement into soils beneath eucalypt and exotic conifer forests in southern central Victoria

Calibration of the RothC model to turnover of soil carbon under eucalypts and pines

Nutrient Dynamics of Aboveground Detritus in Lodgepole Pine (Pinus contorta ssp. latifolia) Ecosystems, Southeastern Wyoming

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