Co2-Mitigation By Agroforestry

Kürsten, Ernst; Burschel, Peter

doi:10.1007/978-94-011-1982-5_36

Cited by 14 publications

(7 citation statements)

References 11 publications

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“…Modelled PCI rates (4.1 -8.1 t ha -1 yr -1 ) for nine tree species in the two-year-old tree phase in eastern Zambia (Table 2) were consistent with those (4.0-8.0 t ha -1 yr -1 ) published for tropical agroforestry systems (Dixon, 1995). Similarly, modelled C stocks in aboveground tree biomass in two-year-old improved fallows (3.4 -9.4 t ha -1 ) were within the published range (1.5-12.5 t ha -1 ) for agroforestry systems in Latin America (Kursten & Burschel, 1993) but lower than those (9.9-21.7 t ha -1 ) published for 18-22-month old fallows in Kenya (Abrecht & Kandji, 2003). Differences between C stocks in this study and that in Kenya could be attributed to variations in soil and climatic conditions.…”

supporting

confidence: 86%

A Conceptual Model of Carbon Dynamics for Improved Fallows in the Tropics

Kaonga¹,

Bayliss‐Smith²

2012

Agroforestry for Biodiversity and Ecosystem Services - Science and Practice

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supporting

confidence: 86%

A Conceptual Model of Carbon Dynamics for Improved Fallows in the Tropics

Kaonga¹,

Bayliss‐Smith²

2012

Agroforestry for Biodiversity and Ecosystem Services - Science and Practice

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“…It is unlikely, however, that such high denitrification rates, the highest of which was equivalent to approximately 10 kg ha-1 day-1 , will occur in the field for any prolonged period. Kursten and Burschel (1993) calculated that 14-52 Mg C ha-1 are stored in the aboveground woody biomass of shade trees in coffee and cacao plantations. Compared to annual crops, these agroforestry systems also stored an additional 10-50 Mg C ha-1 in the litter layer and soil organic matter.…”

Section: Greenhouse Gasesmentioning

confidence: 99%

Shade management in coffee and cacao plantations

Beer

Muschler

Kass

et al. 1998

Directions in Tropical Agroforestry Research

292

311

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Abstract. Shade trees reduce the stress of coffee (Coffea spp.) and cacao (Theobroma cacao) by ameliorating adverse climatic conditions and nutritional imbalances, but they may also compete for growth resources. For example, shade trees buffer high and low temperature extremes by as much as 5 oc and can produce up to 14 Mg ha-1 yr-1 of litterfall and pruning residues, containing up to 340 kg N ha-1 yr-1 • However, N 2 fixation by leguminous shade trees grown at a density of 100 to 300 trees ha-1 may not exceed 60 kg N ha-1 yr-1 • Shade tree selection and management are potentially important tools for integrated pest management because increased shade may increase the incidence of some commercially important pests and diseases (such as Phythphora palmivora and Mycena citricolor) and decrease the incidence of others (such as Colletotrichum gloeosporioides and Cercospora coffeicola). In Central America, merchantable timber production from commercially important shade tree species, such as Cordia alliodora, is in the range of 4-6 m 3 ha-1 yr-1 _ The relative importance and overall effect of the different interactions between shade trees and coffee/cacao are dependent upon site conditions (soil/climate), component selection (species/varieties/provenances), belowground and aboveground characteristics of the trees and crops, and management practices. On optimal sites, coffee can be grown without shade using high agrochemical inputs. However, economic evaluations, which include off-site impacts such as ground water contamination, are needed to judge the desirability of this approach. Moreover, standard silvicultural practices for closed plantations need to be adapted for open-grown trees within coffee/cacao plantations.

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“…foliage, branches, and stem wood, is of general interest to researchers of different scientifi c backgrounds, working on different scales: 1) On regional scales, estimations of carbon storage in forests require information of total tree biomass (e.g. Kürsten and Burschel 1993). In these studies, compartments other than stem wood are often estimated based on very few -and sometimes old -investigations (Bachmann 1968).…”

Section: Introductionmentioning

confidence: 99%

Foliage and branch biomass estimation of coniferous and deciduous tree species

Grote¹

2002

Silva Fenn.

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Under changing environmental conditions, biomass development on the tree and the stand level may differ from today, regardless if the induced change is due to a shift in the general climate properties or to forest management. Under these conditions, tree biomass can not be derived from tables based on former investigations but has to be defi ned from particular biomass investigations, which generally calculate tree and stand biomass from sample branches using allometric relationships. Therefore, sample measurements on harvested trees are needed. In this paper, foliage and branch biomass estimation for 6 Norway spruces (Picea abies) and 6 beeches (Fagus sylvatica) harvested in a 56-year-old mixed stand in southern Germany is presented. Different allometric models are investigated to derive branch biomass from branch dimension for both species. The equations that are based on branch length, foliated branch fraction, and branch diameter are used for tree and stand level estimates. However, the variation within the 6 trees of each species was too large for a reliable calculation of stand biomass, especially in case of beech branch wood. Furthermore, the necessity of allometric relations and their applicability in individual-tree models is discussed, and the importance of suitable branch-and tree selection is underlined.

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Co2-Mitigation By Agroforestry

Cited by 14 publications

References 11 publications

A Conceptual Model of Carbon Dynamics for Improved Fallows in the Tropics

A Conceptual Model of Carbon Dynamics for Improved Fallows in the Tropics

Shade management in coffee and cacao plantations

Foliage and branch biomass estimation of coniferous and deciduous tree species

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