Monitoring the Long-term Effects of Management Practices on Site Productivity in South African Forestry

Schutz, C. J.

doi:10.1080/00382167.1982.9630232

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…Dense accumulations of litter are not a feature in P. radiata stands in the western Cape, although values of 10 000 kg/ha are probably not uncommon (personal observation, D. Versfeld). For P. pinaster in the southern Cape, litter accumulation in mature stands is commonly 30000 to 70000 kg/ha (De Ronde, 1984) while extreme values of 320000 kg/ha have been reported by Schutz (1982) for P. patula in the eastern Transvaal.…”

Section: Litter Accumulationmentioning

confidence: 98%

Litterfall and Nutrient Release in MaturePinus radiatain the South-western Cape

Versfeld

Donald

1991

South African Forestry Journal

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SYNOPSISFast-growing plantations of conifers have replaced areas of mediterranean shrubland in the south-western Cape. This study arises from the need to quantify the impacts of major changes in primary productivity, litterfall, and nutrient cycling in terms of the site utilisation and long-term productivity.Litterfall and decomposition were measured over five years in a catchment under mature Pinus radiata in the Jonkershoek valley near Stellenbosch, with seasonality and nutrient cycling rates assessed for the plantation ecosystem. Data are presented for all components of litterfall including needles, strobili, pollen, seed, bark, branches and cones. Total means annuallitterfall amounted to 3270 kg/ha per annum, of which needles accounted for 76,7 % or 2825 kg/ha, and strobili 8 % (295 kg/ha). Decomposition of needles is at least 50 % after three years and litter accumulation is limited.All components of litterfall have been analysed for nutrient content on at least an annual basis, with detailed seasonal studies of needle litter. Values of N, P, and K at 0,64 %, 0,03 % and 0,29 % of needle mass respectively, are about 50 % of those for fresh needles. The total annual return of nutrients to the forest floor in litter is 26,1 kg of N, 1,5 kg of P, and 10,5 kg of K. Values are also tabulated for Ca, Mg, and the trace elements. The importance of N, P and K in the litter cycle is compared to amounts in standing trees and extracted timber. P. radiata shows an ability to cycle its nutrients very rapidly which may account for its success on nutrient-poor sites.

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Section: Litter Accumulationmentioning

confidence: 98%

Litterfall and Nutrient Release in MaturePinus radiatain the South-western Cape

Versfeld

Donald

1991

South African Forestry Journal

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“…There are no reports of declining growth in second-or third-rotation crops in South Africa (Schutz 1982).…”

Section: Evidence Of Changes In Productivity In Successive Rotationsmentioning

confidence: 99%

IUFRO Symposium on forest site and continuous productivity: Seattle, Washington, August 22-28, 1982.

Ballard¹,

Gessel²

1983

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This Symposium was planned by members of the IUFRO Site Group (S1.02) as part of their on-going activities to facilitate the worldwide exchange of ideas among individual research workers and to promote the dissemination of research results in the area of forest site productivity. The Symposium consisted of three days of indoor sessions followed by a 2-1/2-day field trip through the forests of western Washington, including the Mt. St. Helens blast zone. The Symposium attracted 130 participants from 15 countries.

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AFFORESTATION | Ground Preparation

Baldini

Alfaro

2004

Encyclopedia of Forest Sciences

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Monitoring the Long-term Effects of Management Practices on Site Productivity in South African Forestry

Cited by 7 publications

References 3 publications

Litterfall and Nutrient Release in MaturePinus radiatain the South-western Cape

Litterfall and Nutrient Release in MaturePinus radiatain the South-western Cape

IUFRO Symposium on forest site and continuous productivity: Seattle, Washington, August 22-28, 1982.

AFFORESTATION | Ground Preparation

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