Resorption Efficiency Decreases With Increasing Green Leaf Nutrients in a Global Data Set

Kobe, Richard K.; Lepczyk, Christopher A.; Iyer, Meera

doi:10.1890/04-1830

Cited by 364 publications

(433 citation statements)

References 63 publications

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“…Internal retranslocation rates of N, P, and K occurred in all studied species, with high variation (N: from -16.86 to -49.25% / mean value = -34.41%; P: from -48.89 to -74.47% / mean value = -60.48%/ K: from -39.98 to -77.60% / mean value = -62.90%) ( Table 1). Internal retranslocation was a function of two factors: the low availability of these nutrients in all forest plantations soils (Table 3), which is frequently observed in most tropical soils, especially for N and P (Kobe, Lepczyk, & Iyer, 2005), and the high mobility of these nutrients in plant organisms.…”

Section: Resultsmentioning

confidence: 99%

<b>Nutrient retranslocation in forest species in the Brazilian Amazon

et al. 2016

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ABSTRACT.Internal retranslocation is an important mechanism for nutrient conservation in plants, which depends on different factors. However, there are little data about this subject, especially on tropical forest species. This study aimed to evaluate the macronutrient retranslocation dynamic and the influence of ecological (P: pioneer x NP: non-pioneer) and phenological (ND: non-deciduous x D: semideciduous / deciduous) characteristics on the macronutrient content of leaves of five tree species on monospecific plantations in the Brazilian Amazon: Acacia mangium Willd., Parkia decussata Ducke, Dipteryx odorata (Aublet) Willd., Jacaranda copaia (Aubl.) D. Don and Swietenia macrophylla King. Photosynthetically active green leaves and senescent leaves (leaf litter) were collected. Retranslocation was estimated through an equation proposed by Attiwill, Guthrie and Leuning (1978). The pioneer species presented higher foliar contents of N; the non-pioneer species presented higher contents of K, Ca and S; and the results were inconclusive for P and Mg. The deciduous species presented higher foliar contents of K and of P, whereas the foliar contents of N, Ca, Mg and S were virtually identical between the phenological groups. The internal retranslocation of foliar nutrients in pioneer and non-deciduous species was higher than that of nonpioneer and deciduous species.Keywords: ecological groups, litterfall, nutrient cycling, phenological groups, plant nutrition. Retranslocação de nutrientes em espécies florestais na Amazônia Brasileira RESUMO.A retranslocação interna é um importante mecanismo de conservação de nutrientes nas plantas, que depende de diferentes fatores. Contudo, ainda são incipientes os dados desta natureza, principalmente para espécies florestais tropicais. O presente trabalho objetivou avaliar a dinâmica de retranslocação de macronutrientes e a influência dos grupos ecológico (P: pioneiras x NP: não-pioneiras) e fenológico (ND: não-decíduas x D: semidecíduas / decíduas) nas concentrações foliares de macronutrientes em cinco espécies arbóreas em monocultivo na Amazônia brasileira: Acacia mangium Willd., Parkia decussata Ducke, Dipteryx odorata (Aublet) Willd., Jacaranda copaia (Aubl.) D. Don e Swietenia macrophylla King. Para tanto, foram coletadas folhas verdes fotossinteticamente ativas e folhas da serapilheira. A retranslocação foi estimada segundo a equação de Attiwill, Guthrie e Leuning (1978). As espécies pioneiras apresentaram maiores concentrações foliares de N; as não-pioneiras apresentaram maiores concentrações de K, Ca e S; e os resultados foram inconclusivos para P e Mg. As concentrações foliares de K e de P foram maiores nas espécies decíduas, enquanto que as de N, Ca, Mg e S foram praticamente idênticas entre os grupos fenológicos. No geral, as espécies pioneiras e as não-decíduas foram mais eficientes na retranslocação de nutrientes.Palavras-chave: grupos ecológicos, serapilheira, ciclagem de nutrientes, grupos fenológicos, nutrição de plantas.

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Section: Resultsmentioning

confidence: 99%

<b>Nutrient retranslocation in forest species in the Brazilian Amazon

et al. 2016

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“…Different letters within a column indicate a significant difference at P < 0.05 Table 2. Results (P values) of three-way ANOVAs on the effects of species (S), N addition (N), P addition (P), and their interactions on nitrogen (N s ) and phosphorus (P s ) concentrations in senesced leaves, and nitrogen (NRE) and phosphorus (PRE) resorption efficiency N concentration in green leaves with increased N supply (Kobe et al 2005), implying that plants will absorb more N from soils and become less dependent on N resorbed from senescing leaves.…”

Section: Discussionmentioning

confidence: 99%

“…The results are less conclusive because some studies have shown a decrease in nutrient resorption with increases in soil N availability (Huang et al 2012), but others have shown a neutral effect (Soudzilovskaia et al 2007). Inter-species variation and soil nutrient status might be two important factors for the inconsistent responses (Kobe et al 2005). Furthermore, few studies investigated nutrient resorption responses to increased soil phosphorus (P) availability and to its interactions with increased soil N availability (Kozovits et al 2007), especially in grasslands (Lü and Han 2010).…”

mentioning

confidence: 99%

Nitrogen and phosphorus resorption of Artemisia scoparia, Chenopodium acuminatum, Cannabis sativa, and Phragmites communis under nitrogen and phosphorus additions in a semiarid grassland, China

Li¹,

Zeng²,

Mao³

et al. 2012

Plant Soil Environ.

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A factorial nitrogen (N) × phosphorus (P) addition experiment was conducted to evaluate responses of leaf nutrient resorption to increased soil N and P availability in a semiarid grassland in Keerqin Sandy Lands, China. Four plant species were selected, among which Artemisia scoparia and Chenopodium acuminatum were dominant species in the control and P-added plots, and Cannabis sativa and Phragmites communis were dominant in the N-and N + P-treated plots. Results showed that N and P resorption varied substantially among species (P < 0.01). A general trend of decrease in N resorption efficiency (NRE) and N resorption proficiency (NRP) was observed in response to increased soil N availability for all species, except P. communis only for NRE. Similarly, P resorption proficiency (PRP) decreased in response to P addition for all species, whereas P resorption efficiency (PRE) was not affected by P addition. Species responded differently in terms of PRE and PRP to N addition, whereas no changes in NRE and NRP occurred in response to P addition except P. communis for NRE. Our results suggest that increased soil nutrient availability can influence plant-mediated nutrient cycling directly by changing leaf nutrient resorption and indirectly by altering species composition in the sandy grassland.

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“…recycling of litter nutrients, nutrient resorption from senescing leaves) and improved nutrient acquisition (e.g. phosphorous) by forming mycorrhizal association (Aerts and Chapin-III, 1999;Kobe et al, 2005).…”

Section: Effect Of Nutrient Additionmentioning

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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Resorption Efficiency Decreases With Increasing Green Leaf Nutrients in a Global Data Set

Cited by 364 publications

References 63 publications

<b>Nutrient retranslocation in forest species in the Brazilian Amazon

<b>Nutrient retranslocation in forest species in the Brazilian Amazon

Nitrogen and phosphorus resorption of Artemisia scoparia, Chenopodium acuminatum, Cannabis sativa, and Phragmites communis under nitrogen and phosphorus additions in a semiarid grassland, China

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

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