A framework for quantifying the various effects of tree-crop interactions.

Ong, C. K.; Kho, R. M.

doi:10.1079/9781780645117.0001

Cited by 30 publications

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“…To analyze the sustainability of an agroforestry system, it is important to understand factors and interactions between all species within it (Berlyn andCho 2000, Ong et al 2000), and therefore the choice of species which compose a system is a consideration of great importance (Bayala andWallace 2015, Ong andKho 2015). The growth and development of different types of plants (e.g.…”

Section: Introductionmentioning

confidence: 99%

Growth of tree species and sugarcane production in agroforestry systems

Caron

Elli

Behling

et al. 2018

An. Acad. Bras. Ciênc.

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The appropriate choice of tree species and planting arrangement for use in agroforestry systems is very important in order to maximize productivity and sustainability. The aim of this study was to evaluate the growth of five tree species and its effect on sugarcane yields in different planting arrays in agroforestry systems. The study was conducted from 2007 to 2011 in the city of Frederico Westphalen, RS, Brazil. The five studied tree species were: guapuruvu (Schizolobium parahybae), bracatinga (Mimosa scabrella), canafístula (Peltophorum dubium), angico-vermelho (Parapiptadenia rigida) and eucalypt (Eucalyptus urophylla S.T. Blake x Eucalyptus grandis Hill ex Maiden). Root collar diameter, diameter at breast height, plant height and mean diameter of crown were evaluated for four years with an interval of 90 days between assessments. Yield data for sugarcane were collected in June 2009, 2010, and 2011. Eucalypt presented the greatest root collar diameter values, diameter at breast height, crown development, and plant height. Angico-vermelho, canafístula and eucalypt presented a higher growth in the strip system, while guapuruvu presented the greater growth in the line system. Bracatinga was not influenced by an arrangement in the agroforestry systems. Sugarcane presented greater production in the understory of angico and bracatinga.

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Section: Introductionmentioning

confidence: 99%

Growth of tree species and sugarcane production in agroforestry systems

Caron

Elli

Behling

et al. 2018

An. Acad. Bras. Ciênc.

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“…Benefits also vary over time, because many effects of trees on soils are slow to materialize (Barrios et al, 2012;Ong and Kho, 2015). In western India, farmers maintain and promote scattered trees of Prosopis cineraria (L.), Tecomellaundulata(Sm.)…”

Section: Introductionmentioning

confidence: 99%

“…Agroforestry practices have been part of strategies to improve natural resource management and an adaptation to climatic vagaries in dry regions (Khan and Tewari, 2009;Ong and Kho, 2015)and are more effective in providing regulating, supporting and cultural ecosystem services as compared to other land use practices (Pagella and Sinclair, 2014). Some of them are microclimatic buffering, amelioration of soil structure and water infiltration, reduction of overland flow, regulation of the water cycle and sequestering carbon in both wood and soils (Singh, 2010;Kuyah et al, 2013;Verchot et al, 2008;Rosenstock et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Productivity of Cyamopsistetragonoloba in Prosopis cineraria and Tecomellaundulata based agroforestry systems in Western arid region of India

2016

Sci. Agric

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“…Tree-crop (T-C) interfaces can be regulated effectively (Huxley, 1999), and interspecies competition can be minimized by employing efficient design (Garrett and McGraw 2000) and selecting compatible species (Ong et al 2002(Ong et al , 2014Bayala and Wallace 2015;Ong and Kho 2015). Due to the importance of understanding system functioning and implementing and managing efficiently designed systems, our objectives were to understand the extent of T-C interactions in hedgerow intercropping systems (HI) by examining distribution of solar radiation, soil water and root, intercrop growth, and possibility of manipulating distribution of radiation and water and intercrop growth by optimizing tree arrangement without changing tree density.…”

Section: Introductionmentioning

confidence: 99%

Optimizing resource distribution and crop productivity in hedgerow intercropping by manipulating tree arrangement

2016

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The potential of tree arrangement in optimizing radiation and soil water distribution and crop yield of hedgerow intercropping systems was investigated using a Jatropha curcas-Pennisetum clandestinum (kikuyu) system (Ukulinga, South Africa). Treatments (1110 t ha −1 ) of Jatropha-only (JO), single-row Jatropha and kikuyu (SR), and double-row Jatropha and kikuyu (DR) were used. Treatments had asymmetrical radiation distribution across tree-crop (T-C) interfaces and different radiation interception by trees (JO: 27 %, SR: 11 %, DR: 8 %). Soil water varied among treatments and was asymmetrically distributed showing no consistent trend towards trees. Evapotranspiration was higher (p < 0.05) in SR than DR (13-65 %) and JO (16-37 %) for most part of the season. Estimated fine tree roots distribution was symmetrical in DR but not JO and SR. Total roots in SR were concentrated in the top 0.2 m (91 %) and beneath tree row (30 %), and varied inconsistently with distance from trees. Grass yields increased farther from tree rows and were higher in SR (8. ) also increased with distance from trees but irradiance correlated with grass yields poorly (R 2 < 0.32) despite high rainfall and no nutrient limitation. Considering total productivity and evapotranspiration, DR was better tree arrangement than SR. Water availability dictated T-C interactions and intercrop yield more than radiation. It was possible to optimize radiation and water distribution and intercrop growth by manipulating tree arrangement without changing density. KeywordsEfficient agroforestry design Growth Radiation use efficiency Silvopasture Tree-crop interactions INTRODUCTIONProduction of food crops and pastures in South Africa faces deterioration and limited arability of land and relatively low and erratic rainfall. Moreover, yields and food security are compromised by low agricultural production technologies practices and low inputs in resource-poor communities. One of such regions is the Coast Hinterland Thornveld region, which is classified as Bioresource Group 17 (Camp, 1997). This warm temperate region with annual rainfall (according to the Köppen classification) has an area of 113 367 ha and is characterized by severely degraded natural resources due to continuous burning to enhance fresh growth and selective overgrazing, poor water supply, frequent droughts and only 33% arable land. Vegetation in the area is wooded grasslands, woodlands and bushed grasslands dominated by secondary Acacia species and Aristida junciformis grass, which is an inedible by livestock (Everson et al. 2012). The potential exists for agroforestry to 1 be implemented a resource-efficient production system to rehabilitate the land, produce fodder to reduce pressure on the natural grasslands, and generate additional income by employing species that are tolerant to poor soils and not excessive water users.To ascertain sustainability of agroforestry systems, understanding factors and interactions involved is essential (Berlyn and Cho 2000;Ong et al 2000). Tree-crop (T-C) inte...

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A framework for quantifying the various effects of tree-crop interactions.

Abstract: This chapter briefly describes the individual effects of tree-crop interactions (soil fertility improvement, soil conservation, microclimate improvement and competition) and suggests how these may be quantified.

Cited by 30 publications

References 0 publications

Growth of tree species and sugarcane production in agroforestry systems

Growth of tree species and sugarcane production in agroforestry systems

Productivity of Cyamopsistetragonoloba in Prosopis cineraria and Tecomellaundulata based agroforestry systems in Western arid region of India

Optimizing resource distribution and crop productivity in hedgerow intercropping by manipulating tree arrangement

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