Biophysical Interactions Between Timber Trees and Arabica Coffee in Suboptimal Conditions of Central America

Vaast, Philippe; Kanten, Rudi van; Siles, Pablo; Angrand, Jobert C.; Aguilar, Alejandra Barquero

doi:10.1007/978-1-4020-6572-9_9

Cited by 25 publications

(28 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Under suboptimal (hotter and drier) growing conditions, coffee production in full sun is lower than in the shade (De Freitas et al 2003;van Kanten and Vaast 2006) which has been related to the high sensitivity of coffee g s to VPD l (DaMatta and Ramalho 2006;Ronquim et al 2006;Vaast et al 2007). As shade trees reduce wind speed and leaf temperature while increasing air humidity, and hence reducing VPD l and the stomatal limitations of coffee A n , agroforestry systems have been recommended for suboptimal growing conditions (DaMatta 2004;DaMatta et al 2007;Vaast et al 2007). Nevertheless, DaMatta et al (2007) have emphasized that, under optimal or near-optimal edapho-climatic conditions, shade provides little, if any, benefit to the crop.…”

Section: Introductionmentioning

confidence: 97%

“…Limitation of photosynthesis by low light availability has been proposed as one of the main reasons for lower yields of coffee grown in agroforestry systems in optimal coffee production areas such as southeastern Brazil (DaMatta et al 2007) and the Central American highlands (Beer et al 1998). Under suboptimal (hotter and drier) growing conditions, coffee production in full sun is lower than in the shade (De Freitas et al 2003;van Kanten and Vaast 2006) which has been related to the high sensitivity of coffee g s to VPD l (DaMatta and Ramalho 2006;Ronquim et al 2006;Vaast et al 2007). As shade trees reduce wind speed and leaf temperature while increasing air humidity, and hence reducing VPD l and the stomatal limitations of coffee A n , agroforestry systems have been recommended for suboptimal growing conditions (DaMatta 2004;DaMatta et al 2007;Vaast et al 2007).…”

Section: Introductionmentioning

confidence: 97%

“…Coffee has low rates of net carbon assimilation (A n ), typically bellow 11 lmol m -2 s -1 (Franck et al 2006;Silva et al 2004) which has been related to diffusive rather than biochemical limitations (Chaves et al 2008;DaMatta et al 2007). Actually, the stomatal limitations are associated with a strong stomatal sensitivity to increasing leaf-to-air vapor pressure deficit (VPD l ) along the day (Ronquim et al 2006;Vaast et al 2007) and result in large reductions of A n , particularly in the afternoon (DaMatta and Ramalho 2006). Moreover, this species is prone to photoinhibition of photosynthesis when exposed to full solar irradiance as coffee A n saturates at low irradiance (Ramalho et al 2000).…”

Section: Introductionmentioning

confidence: 98%

“…Nevertheless, DaMatta et al (2007) have emphasized that, under optimal or near-optimal edapho-climatic conditions, shade provides little, if any, benefit to the crop. However, agroforestry systems have other benefits such as (1) positive financial impacts by the reduction of biennial bearing and by the generation of extra income from associated trees (fruit, fuel wood and timber) and (2) the enhanced conservation of natural resources and biodiversity (Beer et al 1998;Vaast et al 2007). Moreover, shade has been shown to enhance coffee bean size (Franck 2005) as well as cup quality ).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Limitation of coffee leaf photosynthesis by stomatal conductance and light availability under different shade levels

Franck

Vaast²

2009

Trees

View full text Add to dashboard Cite

In agroforestry systems, the effect of shade trees on coffee net photosynthesis (A n ) has been the object of debates among coffee scientists. In this study, we undertook over 600 coffee A n ''spot'' measurements under four different artificial shade levels (100, 72, 45 and 19% of full solar irradiance) and analyzed limitations to A n by low light availability (photon flux density, PFD) and stomatal conductance (g s ). These gas exchange measurements were carried out during two consecutive coffee growing seasons in a commercial plantation in the Orosi valley of Costa Rica. Levels of A n were related to PFD and g s in order to calculate envelope functions which were used to establish PFD or g s limitations to A n . Under the growing conditions of the present trial, mean leaf A n remained stable for growth irradiance (GI) as low as 45% of full sun and decreased by *20% at 19% GI. Limitation to A n due to g s was strong in full sun and decreasing with increasing shade levels. On the other hand, limitation due to PFD remained at a similar level for all shade treatments. These different evolutions of limitations of A n by PFD and g s in response to shade explain the absence of a decrease in coffee leaf A n with a shade level up to 55%. Consequently, these results confirm that Arabica coffee is a shade-adapted plant with leaves that can maintain a high photosynthetic performance under low light availability.

show abstract

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Limitation of coffee leaf photosynthesis by stomatal conductance and light availability under different shade levels

Franck

Vaast²

2009

Trees

View full text Add to dashboard Cite

show abstract

“…Although shade cover can be beneficial for coffee growth and production in suboptimal climatic conditions (Vaast et al, 2008), it is important to regulate the quantity of shade, because too much of it can result in a very humid microclimate conducive to higher incidence of fungal diseases such as leaf rust (caused by Hemileia vastatrix) (Avelino et al, 2007) and American leaf spot (caused by Mycena citricolor) (Wintgens, 2004).…”

Section: Introductionmentioning

confidence: 99%

Impact of tree shading on the microclimate of a coffee plantation: a case study from the Peruvian Amazon

Ehrenbergerová¹,

Šenfeldr

Habrová

2018

Bois for. trop.

View full text Add to dashboard Cite

L’agroforesterie est considérée comme l’une des stratégies agricoles pouvant contribuer à l’adaptation des cultures au changement climatique. La présente étude de cas visait à comparer les conditions microclimatiques d’une parcelle de Coffea arabica cultivée sous ombrage, principalement Inga spp., et celles d’une parcelle de C. arabica menée en monoculture sans ombrage dans la même plantation de café, dans la région de Pasco au Pérou. La température et l’humidité de l’air, la température du sol et la disponibilité en eau du sol ont été mesurées pendant trois ans. Les résultats indiquent que l’ombrage des arbres réduit la température moyenne de l’air de 0,4 ± 0,04 °C et la température du sol de 1,7 ± 0,3 °C, et augmente l’humidité de l’air de 3,9 ± 0,4 % par rapport à la zone sans ombrage. Cependant, la moyenne mensuelle des températures de l’air dans la zone non ombragée, et même la température maximale, ne dépassent pas outre mesure la limite permettant la photosynthèse (seuil 34 °C). De plus, les températures minimales mensuelles diffèrent peu entre les zones ombragées et non ombragées, alors que la fluctuation des températures du sol est plus marquée dans la zone non ombragée. Un des principaux constats de cette étude concerne la sécheresse plus marquée des sols dans la zone ombragée, surtout au début et à la fin de la saison sèche. Ceci s’explique probablement par l’augmentation de la transpiration totale par celle des arbres d’ombrage. L’absorption d’eau plus importante en agroforesterie pourrait ainsi avoir un impact négatif sur la croissance des caféiers dans les situations où la disponibilité en eau est un facteur limitatif.

show abstract

Effect of Inorganic Fertilizer Application on Green House Gas Emissions and Microbial Activity under Coffee Agroforestry in Eastern Uganda

Sebuliba

Mwanjalolo

Isubikalu

et al. 2022

Preprint

View full text Add to dashboard Cite

A study was conducted in none tilled coffee agroforestry fields of Eastern Uganda to understand the effects of application of inorganic fertilizers on soil nutrient loss in form of gas for mitigation of unsustainable agricultural practices. This study specifically i) assessed the effect of application of inorganic fertilizers on greenhouse gas emissions, ii) determined their effect on microbial carbon, nitrogen and phosphorus and iii) determined their effect on leaf litter decomposition under Albizziacoffee growing systems of the Mount Elgon. Soil gas emissions were measured with the static chamber method for twelve months in a field experiment with five different fertilizer treatments. The effect of treatments was separated using ANOVA in Genstat discovery version 13. Microbial carbon, nitrogen and phosphorus was separated using Mann-Whitney U test. Results showed that annual emissions ranged from 19.6 to 26.1 (t C/ha/yr), 3.5 to 9 (Kg N/ha/yr) and 6.9 to 9.2 (Kg C/ha/yr) for carbon dioxide, nitrous oxide and methane respectively. Significant effects on soil emissions only occurred for nitrous oxide (P=0.017), microbial carbon (p=0.001) and microbial phosphorus (p<0.001) for the study period. The mixture of NPK fertilizers presented the lowest carbon dioxide loss and application of TSP presented the lowest nitrous oxide emission from soil. This study underscores the need for establishment of long-term experiments across several agro-ecological zones to confirm farmers' perceptions of their soil fertility levels and ascertain the contribution of farm practices towards the retention of nutrients in the soil with minimal emission, to inform decisions of small holder farmers, policy and development partners for sustainable production. Hosted fileAnnual GHG emissions.docx available at https://authorea.com/users/564643/articles/611572effect-of-inorganic-fertilizer-application-on-green-house-gas-emissions-and-microbialactivity-under-coffee-agroforestry-in-eastern-uganda Hosted fileStudy Area SSSA.docx available at https://authorea.com/users/564643/articles/611572-effectof-inorganic-fertilizer-application-on-green-house-gas-emissions-and-microbial-activityunder-coffee-agroforestry-in-eastern-uganda Hosted fileMonthly GHG emissions.docx available at https://authorea.com/users/564643/articles/611572effect-of-inorganic-fertilizer-application-on-green-house-gas-emissions-and-microbialactivity-under-coffee-agroforestry-in-eastern-uganda Effect of Inorganic Fertilizer Application on Green House Gas Emissions and Microbial Activity under Coffee Agroforestry in Eastern Uganda• The application of inorganic fertilizers increased annual soil nitrogen losses in form of soil N 2 O emissions.• Peaks of N 2 O emissions were observed immediately after application of inorganic fertilizers but levelled afterwards.• The application of inorganic fertilizers increased microbial carbon and microbial phosphorus in soil after one year.• The application of inorganic fertilizers did not affect leaf litter decomposition rates.• The mixture of NPK...

show abstract

Biophysical Interactions Between Timber Trees and Arabica Coffee in Suboptimal Conditions of Central America

Cited by 25 publications

References 10 publications

Limitation of coffee leaf photosynthesis by stomatal conductance and light availability under different shade levels

Limitation of coffee leaf photosynthesis by stomatal conductance and light availability under different shade levels

Impact of tree shading on the microclimate of a coffee plantation: a case study from the Peruvian Amazon

Effect of Inorganic Fertilizer Application on Green House Gas Emissions and Microbial Activity under Coffee Agroforestry in Eastern Uganda

Contact Info

Product

Resources

About