The nitrogen economy in a Pinus pinea L. stand

Rapp, M.; Leclerc, Melen; Lossaint, P.

doi:10.1016/0378-1127(79)90048-3

Cited by 35 publications

(15 citation statements)

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“…From the detailed studies of the phenology of the growth processes and of the increment and accumulation of biomass in a Pinus pinea stand Rapp, 1978, 1981 a andb;Rapp and Cabanettes, 1980) together with estimates of the main parameters of the bio-geochemical cycles (Rapp et al, 1979;Rapp, 1984), it was clear that, at least as far as nitrogen is concerned, the uptake at this site amounted to the quantities of nitrogen immobilized or in transit through the annual production of leaf biomass. This can be explained by the nature of this nutrient, which is an essential component of organic matter.…”

Section: Nitrogen Absorption Translocation and Allocation By Treesmentioning

confidence: 99%

“…A study was undertaken for 1 year in the Pinus pinea stand (Rapp et al, 1979), using three replications from each layer (humus and A1). The technique allows the estimation of nitrogen mineralization on a yearly basis and at the same time indicates seasonal variations.…”

Section: Nitrogen Mineralizationmentioning

confidence: 99%

“…The technique allows the estimation of nitrogen mineralization on a yearly basis and at the same time indicates seasonal variations. (Rapp et al, 1979). mineralization remains very low during the rest of the year (fall and winter).…”

Section: Nitrogen Mineralizationmentioning

confidence: 99%

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Nitrogen status and mineralization in natural and disturbed mediterranean forests and coppices

Rapp

1990

Plant Soil

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Past and current work on biological processes related to nitrogen fluxes and cycling in natural and disturbed Mediterranean forest sites are discussed. In natural conditions, the main point reviewed is mineral nitrogen availability in the soil, and particularly the process of mineralization (ammonification, nitrification) in the field as well as nitrogen uptake by Pinus pinea. Some aspects of nitrogen translocation within the trees are also considered. Perturbation of the nitrogen status, and especially nitrogen mineralization, as a result of manipulation of forest sites are discussed by comparing both a holm oak coppice with a clearcut and a Pinus halepensis woodland before and after prescribed fire.

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Section: Nitrogen Absorption Translocation and Allocation By Treesmentioning

confidence: 99%

Section: Nitrogen Mineralizationmentioning

confidence: 99%

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Nitrogen status and mineralization in natural and disturbed mediterranean forests and coppices

Rapp

1990

Plant Soil

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“…Tbe Storage atid seasonal intertial cycling of nitrogen (N) bas been sbovvn to be importatit for tbe sustainable growtb of evergreen trees (Miller et al, 1979;Rapp, Leclerc & Lossaint, 1979;Millaid & Proe, 1992). In conifers, N is stored duritig tbe winter in needles and remobilized in tbe spring duritig tbe growtb of new foliage, as sbowti by N budget studies (Turner, 1977;Ericsson et al, 1985, Nambiar & Fife, 1987Heltnisaari, 1992a, b) and tbe use of ""N to quantify internal cycling directly (Millat-d & Pioe, 1992), Nitrogen budget studies bave sbowti tbat enbanced site fertility increases tbe capacity for ititertial cycling (Miller et al, 1979), tbrougb increasing needle mass atid so tbe capacity for N storage (Nambiar & Eife, 1987;Heltnisaari, 1992«), Eew studies bave considered tbe impact of nutrient supply oti tbe efficieticy of tbe processes of internal cyclitig.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen uptake, partitioning and internal cycling in Picea sitchensis (Bong.) Carr. as influenced by nitrogen supply

Millard¹,

Proe²

1993

New Phytologist

114

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SUMMARYFour-year-old seedlings ol Ptcea sttclteiisis (Bong,) Carr, were grown in sand culture throughout 1989 and irrigated witb nutrient solutions containing either 1-0 mol N m^'' (Low N) or 6-0 mol N m"'' (High N), to precondition their growth and capacity for N storage. During 1990 N enriched with '^N was stipplied, either from 15 March to 27 June, or 28 June to 20 November, Recovery of unlabelled N was used to determine the storage and remobilization of N for foliage growth, and the partitioning of labelled N taken up during the two periods was tneasured.Initial growtb of trees in 1990 was unaffected by the current N supply and detertiiined only by the N supplied the previous year. High N throughout increased the number of needles grown in 1990 compared to low N-treated trees, but bad little effect on the dry weight of individual needles. When preconditioned with High N, trees responded to Low N in 1990 by a reduction in needle dry weight, without altering the number of needles produced. Low N trees supplied with High N in 1990 responded by increasing both needle tiumbers and dry weigbt, compared with trees supplied with Low N throughout, Tbe amount of unlabelled N remobilized to foliage growtb in 1990 was unaffected by the current N supply but t-eflected the atnount of N iti store, as determined by tbe N supply the previous year. The majority of N was remobilized from the 1989 foliage and none from roots. Partitioning ot labelled N taken up during 1990 altered during the year, with a greater proportion of N taken up after 28 June recovered in the roots in all treatments, due to root growth as opposed to allocation of N to storage during the autumn, since root N concentrations fell betw-een 17 June and the final har\-est on 20 November.

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“…The amount a soil can hold varies with soil characteristics (Zoettl, 1990), however, results here indicate that it will be difficult to effect long term improvements in nutrient status by the addition of N fertilizers on this low rainfall site. Rates of mineralisation of soil N can be low (Rapp et al, 1979), and once annual additions of fertilizer N are stopped in the trial described here rates of mineralisation may not provide sufficient N to maintain the high rates of growth attained. A decline in growth can be expected over several years with the cessation of fertilizer additions and a subsequent reliance of the trees on internal recycling (Beets and Pollock, 1987) and mineralisation of soil organic matter for their N supply.…”

Section: Discussionmentioning

confidence: 99%

Growth response of Pinus radiata to multiple applications of nitrogen fertilizer and evaluation of the quantity of added nitrogen remaining in the forest system

Neilsen¹,

Pataczek²,

Lynch³

et al. 1992

Plant Soil

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The nitrogen economy in a Pinus pinea L. stand

Cited by 35 publications

References 0 publications

Nitrogen status and mineralization in natural and disturbed mediterranean forests and coppices

Nitrogen status and mineralization in natural and disturbed mediterranean forests and coppices

Nitrogen uptake, partitioning and internal cycling in Picea sitchensis (Bong.) Carr. as influenced by nitrogen supply

Growth response of Pinus radiata to multiple applications of nitrogen fertilizer and evaluation of the quantity of added nitrogen remaining in the forest system

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