Growth response of Acacia koa trees to thinning, grass control, and phosphorus fertilization in a secondary forest in Hawai‘i

Scowcroft, Paul G.; Friday, James B.; Idol, Travis; Dudley, Nicklos S.; Haraguchi, Janis E.; Meason, Dean F.

doi:10.1016/j.foreco.2006.11.009

Cited by 29 publications

(43 citation statements)

References 28 publications

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“…The soil taxonomy is medial-skeletal, amorphic, isomesic Typic Hapludands (http://www2.ftw.nrcs.usda.gov/ osd/dat/K/KE@AMOKU.html). Although relatively young soils in Hawaii have been characterized as nitrogen (N) not phosphorus (P) limited for plant growth (Vitousek et al, 1993;Crews et al, 1995), the reverse appears to be true for our study site (Pearson and Vitousek, 2001;Scowcroft et al, 2007).…”

Section: Study Areamentioning

confidence: 81%

“…koa regenerated from buried seed (Skolmen and Fujii, 1981) and 1 year after treatment, stand densities averaged 20,000 seedlings ha À1 . As a result of self-thinning density steadily declined during the next 23 years to approximately 1000 trees ha À1 (Scowcroft et al, 2007). Average height, DBH and stand basal area of A. koa at 24 years of age were 11.9 m, 18.0 cm and 25.7 m 2 ha À1 , respectively.…”

Section: Stand Historymentioning

confidence: 99%

“…To address this knowledge gap, we initiated an experiment in 2002 to determine the growth response of potential A. koa crop trees to pre-commercial thinning of competing non-crop A. koa trees, chemical control of exotic grasses and P fertilization (Scowcroft et al, 2007). We found that thinning combined with grass control plus P fertilization increased annual stem diameter increment at breast height by nearly 120%.…”

Section: Introductionmentioning

confidence: 99%

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Understory structure in a 23-year-old Acacia koa forest and 2-year growth responses to silvicultural treatments

Scowcroft

Haraguchi

Fujii

2008

Forest Ecology and Management

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Section: Study Areamentioning

confidence: 81%

Section: Stand Historymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Understory structure in a 23-year-old Acacia koa forest and 2-year growth responses to silvicultural treatments

Scowcroft

Haraguchi

Fujii

2008

Forest Ecology and Management

Self Cite

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“…Live crown ratio is reported to be a good indicator of both tree relative growth rate (York et al, 2006) and vigour (Ruel et al, 2000), and positive relationships between LCR and tree growth rates have been reported (Scowcroft et al, 2007). It should be noted, however, that much of many detailed analyses of biomass variation with crown traits refer to coniferous trees, in which there is much less variation in crown form than among our heterogeneous collection of tropical hardwoods.…”

Section: Biometric Traits As Predictors Of Total Tree Biomassmentioning

confidence: 83%

Biomass distribution among tropical tree species grown under differing regional climates

Bastien-Henri¹,

Park²,

Ashton³

et al. 2010

Forest Ecology and Management

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a b s t r a c tIn the Neotropics, there is a growing interest in establishing plantations of native tree species for commerce, local consumption, and to replant on abandoned agricultural lands. Although numerous trial plantations have been established, comparative information on the performance of native trees under different regional environments is generally lacking. In this study, we evaluated the accumulation and partitioning of above-ground biomass in 16 native and two exotic tree species growing in replicated species selection trials in Panama under humid and dry regional environments. Seven of the 18 species accumulated greater total biomass at the humid site than at the dry site over a two-year period. Speciesspecific biomass partitioning among leaves, branches and trunks was observed. However, a wide range of total biomass found among species (from 1.06 kg for Dipteryx panamensis to 29.84 kg for Acacia mangium at Soberania) justified the used of an Aitchison log ratio transformation to adjust for size. When biomass partitioning was adjusted for size, a majority of these differences proved to be a result of the ability of the tree to support biomass components rather than the result of differences in the regional environments at the two sites. These findings were confirmed by comparative ANCOVAs on Aitchison-transformed and non-Aitchison-transformed variables. In these comparisons, basal diameter, height and diameter at breast height were robust predictors of biomass for the pooled data from both sites, but Aitchison-transformed variables had little predictive power.

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“…In the rainforest of Panama, addition of mineral fertilizers may increase sapling growth of Tetragastris panamensis , and in a secondary forest of Hawaii, Acacia koa trees may grow faster in P-amended soils (Scowcroft et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Do soil fertilization and forest canopy foliage affect the growth and photosynthesis of Amazonian saplings?

Magalhães

Marenco

Camargo

2014

Sci. agric. (Piracicaba, Braz.)

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Most Amazonian soils are highly weathered and poor in nutrients. Therefore, photosynthesis and plant growth should positively respond to the addition of mineral nutrients. Surprisingly, no study has been carried out in situ in the central Amazon to address this issue for juvenile trees. The objective of this study was to determine how photosynthetic rates and growth of tree saplings respond to the addition of mineral nutrients, to the variation in leaf area index of the forest canopy, and to changes in soil water content associated with rainfall seasonality.We assessed the effect of adding a slow-release fertilizer. We determined plant growth from 2010 to 2012 and gas exchange in the wet and dry season of 2012. Rainfall seasonality led to variations in soil water content, but it did not affect sapling growth or leaf gas exchange parameters. Although soil amendment increased phosphorus content by 60 %, neither plant growth nor the photosynthetic parameters were infl uenced by the addition of mineral nutrients. However, photosynthetic rates and growth of saplings decreased as the forest canopy became denser.Even when Amazonian soils are poor in nutrients, photosynthesis and sapling growth are more responsive to slight variations in light availability in the forest understory than to the availability of nutrients. Therefore, the response of saplings to future increases in atmospheric [CO 2 ] will not be limited by the availability of mineral nutrients in the soil.

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Growth response of Acacia koa trees to thinning, grass control, and phosphorus fertilization in a secondary forest in Hawai‘i

Cited by 29 publications

References 28 publications

Understory structure in a 23-year-old Acacia koa forest and 2-year growth responses to silvicultural treatments

Understory structure in a 23-year-old Acacia koa forest and 2-year growth responses to silvicultural treatments

Biomass distribution among tropical tree species grown under differing regional climates

Do soil fertilization and forest canopy foliage affect the growth and photosynthesis of Amazonian saplings?

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