Decomposing litter as a sink for -enriched additions to an oak forest and a red pine plantation

Micks, Patricia; Downs, Martha R.; Magill, Alison H.; Nadelhoffer, Knute J.; Aber, John D.

doi:10.1016/j.foreco.2004.03.013

Cited by 53 publications

(35 citation statements)

References 38 publications

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“…Our results are also similar to the results found in an NH 4 NO 3 addition experiment in an oak forest and a red pine plantation in North America (Micks et al, 2004), and the results that N addition suppressed mineralization of soil organic matter in Europe (Hagedorn et al, 2003).…”

Section: Discussionsupporting

confidence: 90%

“…However, no such significant increase of N content was found in nutrient-poor needles. It is proposed that during later stages, lignolytic enzyme efficiency maybe limited by high N content or by high availability of inorganic N (Ågren et al, 2001;Berg, 1986;Berg et al, 1998;Fog, 1988;Hagedorn et al, 2003;Magill and Aber, 1998;Micks et al, 2004). This is also supported by the results found in laboratory experiments (Craine et al, 2007).…”

Section: Discussionmentioning

confidence: 78%

“…However, most studies of litter decomposition have been performed in temperate forest ecosystems, little information is available on decay responses to N deposition in tropical forests (Cleveland et al, 2006;McGroddy et al, 2004;Micks et al, 2004;Vitousek, 1998), especially in the forests of China . Nitrogen deposition in tropical and subtropical regions is projected to increase in the coming decades, due to the rapid expansion of industrial and agricultural activities (Galloway et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Decomposition responses of pine (Pinus massoniana) needles with two different nutrient-status to N deposition in a tropical pine plantation in southern China

Fang

Zhu

et al. 2008

Ann. For. Sci.

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-• The effect of nitrogen (N) deposition on the decomposition of pine (Pinus massoniana) needles in a tropical pine plantation was studied. The pine needles with two different nutrient status (nutrient-rich and nutrient-poor) were used, followed by 3-levels of N treatments (Control: no N addition, Low-N: 5 g N m −2 y −1 , and Medium-N: 10 g N m −2 y −1 experimental inputs), which had been applied for 26 months continuously before this experiment and continued throughout the decomposition measurement.• The main objective was to test the hypothesis that decomposition of nutrient-rich needles would be more sensitive to cumulative N deposition than the decomposition of nutrient-poor needles.• Nitrogen addition had negative effect on mass loss, and the release of N and P from decomposing nutrient-rich needles but little or no effect on the decomposition of nutrient-poor needles. In addition, a negative effect in the initial decomposition phase and a positive effect in later decay stages were found on C release. The negative effect was stronger on nutrient-rich needles than on nutrient-poor needles, but the reverse was true for the positive effect.• Our results suggest that response of litter decomposition to N deposition may vary depending on the nutrient status of the litter.anthropogenic impacts / litter decomposition / carbon sequestration / nutrient status / tropics Résumé -Décomposition des aiguilles de pin en relation avec différents apports de dépôts azotés dans une plantation de pins tropicaux (Pinus massoniana) du Sud de la Chine.• Les effets des dépôts azotés (N) sur la décomposition des aiguilles de pin ont été étudiés dans une plantation de pins tropicaux (Pinus massoniana) du Sud de la Chine. Les aiguilles de pin différentes par leur statut nutritionnel (station riche en nutriments et station pauvre en nutriments) ont été utilisées dans une expérimentation comportant 3 niveaux de traitement azoté (témoin sans apport d'azote, apport faible d'azote : 5 g N m −2 an −1 , apport moyen d'azote : 10 g Nm −2 an −1 ) qui ont été appliqués pendant une période de 26 mois avant et pendant cette expérimentation.• L'objectif principal était de tester l'hypothèse que la décomposition des aiguilles riches en nutriments devrait être plus sensible à une déposition cumulée d'azote que la décomposition des aiguilles pauvres en nutriments.• L'apport répété d'azote a eu un effet négatif sur la perte de masse et la libération d'azote et de phosphore des aiguilles de la station riche et un effet faible ou nul sur la décomposition des aiguilles de la station la plus pauvre. En outre, un effet négatif dans la phase initiale de la décomposition et un effet positif dans les phases plus tardives de la décomposition ont été mis en évidence pour la libération de carbone. L'effet négatif a été plus fort pour les aiguilles riches en nutriments que pour les aiguilles pauvres en nutriments, mais l'inverse était vrai pour ce qui concerne l'effet positif.• Nos résultats, complétés par ceux obtenus au cours d'expérimentation antérie...

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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Decomposition responses of pine (Pinus massoniana) needles with two different nutrient-status to N deposition in a tropical pine plantation in southern China

Fang

Zhu

et al. 2008

Ann. For. Sci.

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“…Nitrogen deposition may either positively, neutrally, or negatively affect litter decomposition by altering soil N availability and soil microbial decomposers (Micks et al 2004;Knorr et al 2005;Fang et al 2007;Hobbie et al 2006;Keeler et al 2009). However, forest management practices in plantations, such as thinning, ploughing, and fertilization, can also impact litter decomposition by altering the physicochemical and biological properties of the soil (Balesdent et al 1998;Xu et al 1998;Pandey et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Management practices amplify the effects of N deposition on leaf litter decomposition of the Moso bamboo forest

Song

Zhou

et al. 2015

Plant Soil

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Aims The litter decomposition effects of N deposition in combination with management practices are still unclear. The aims of this study were to test the individual and interactive effects of the two factors on Moso bamboo leaf litter decomposition. Methods The experiment was conducted in Moso bamboo forests over a 24-month period and included three N addition treatments (low N, 30 kg N ha −1 yr −1 ;medium N, 60 kg N ha −1 yr −1 ; and high N, 90 kg N ha −1 yr −1 ) and two management practices (conventional management and intensive management). Results The low-N treatment significantly increased the annual decomposition rate, whereas the high-N treatment significantly decreased the annual decomposition rate (P<0.05). Intensive management alone did not significantly influence decomposition, but it amplified both the positive effects of the low-N treatment and the negative effects of the high-N treatment on litter decomposition. Intensive management weakened the positive effects of N addition on N loss but enhanced the positive effects on P loss during the early stage. Conclusions The effects of increasing N deposition in a plantation ecosystem were altered by the management practices, and these changes should be considered when estimating the biological effects of N deposition at regional and global scales.

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“…Previous studies have reported that long-term N deposition reduces soil MBC [22,38]. A high degree of N deposition could affect the composition of the microbial community and inhibit the C of microbial degradation, thereby decelerating the decomposition of litter [39,40]. The effect mentioned above contributes to a decline in soil DOC and DON.…”

Section: Effects Of N Deposition On Soil Doc and Donmentioning

confidence: 99%

Effects of Nitrogen Deposition on Soil Dissolved Organic Carbon and Nitrogen in Moso Bamboo Plantations Strongly Depend on Management Practices

Lei

Sun

et al. 2017

Forests

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Soil dissolved organic carbon (DOC) and nitrogen (DON) play significant roles in forest carbon, nitrogen and nutrient cycling. The objective of the present study was to estimate the effect of management practices and nitrogen (N) deposition on soil DOC and DON in Moso bamboo (Phyllostachys edulis (Carrière) J. Houz) plantations. This experiment, conducted for over 36 months, investigated the effects of four N addition levels (30, 60 and 90 kg N ha −1 year −1 , and the N-free control) and two management practices (conventional management (CM) and intensive management (IM)) on DOC and DON. The results showed that DOC and DON concentrations were the highest in summer. Both intensive management and N deposition independently decreased DOC and DON in spring (p < 0.05) but not in winter. However, when combined with IM, N deposition increased DOC and DON in spring and winter (p < 0.05). Our results demonstrated that N deposition significantly increased the loss of soil DOC and DON in Moso plantations, and this reduction was strongly affected by IM practices and varied seasonally. Therefore, management practices and seasonal variation should be considered when using ecological models to estimate the effects of N deposition on soil DOC and DON in plantation ecosystems.

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Decomposing litter as a sink for -enriched additions to an oak forest and a red pine plantation

Cited by 53 publications

References 38 publications

Decomposition responses of pine (Pinus massoniana) needles with two different nutrient-status to N deposition in a tropical pine plantation in southern China

Decomposition responses of pine (Pinus massoniana) needles with two different nutrient-status to N deposition in a tropical pine plantation in southern China

Management practices amplify the effects of N deposition on leaf litter decomposition of the Moso bamboo forest

Effects of Nitrogen Deposition on Soil Dissolved Organic Carbon and Nitrogen in Moso Bamboo Plantations Strongly Depend on Management Practices

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