The Effect of Treatment for Land Surface during Forest Practice on Soil Nitrogen Dynamics.

Shibata, Hideaki; Ozawa, M.; Satoh, Fuyuki; Sasa, Kaichiro

doi:10.4005/jjfs.89.314

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…Sasa litterfall accounted for 30% of the total litterfall in a natural forest, and that the litter decomposed more slowly than tree leaf litter because of its high silicate content [ 26 ]. It has also been reported that Sasa mitigates increases of soil inorganic N [ 27 , 28 , 29 ] and N leaching from soil to streams [ 30 , 31 ] because of the rapid annual increment of its aboveground and belowground biomass. These results indicate that Sasa take up the most of increased soil inorganic N after disturbances such as atmospheric N deposition or forest management treatments, suggesting that the change of soil N fertility influence on Sasa litter dynamics.…”

Section: Introductionmentioning

confidence: 99%

Short-Term Response of Sasa Dwarf Bamboo to a Change of Soil Nitrogen Fertility in a Forest Ecosystem in Northern Hokkaido, Japan

Watanabe

Fukuzawa

Shibata

2016

Plants

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In forest ecosystems, a change of soil nitrogen (N) cycling after disturbance is regulated by various factors. Sasa dwarf bamboo (hereafter referred to as Sasa) is an understory plant that grows thickly on the forest floor in northern Hokkaido, Japan. However, the ecosystem function of Sasa after disturbances in the soil N cycling is not fully understood. The purpose of this study was to determine the short-term response of Sasa to a change of soil N fertility. Biomass, litterfall, litter decomposition, soil N pool, and N leaching from soil were measured in control, and low- (5 g N m−2 year−1) and high-N (15 g N m−2 year−1) addition plots. Sasa immobilized much N as the soil N fertility increased. However, the leaf N concentration in aboveground biomass did not increase, suggesting that the N in leaves was maintained because of the increase of leaf biomass. As a result, the decomposition and mineralization rates of the produced litter before and after N addition were comparable among plots, even though the soil inorganic N fertility increased greatly. These results suggest that immediate response of Sasa to an increase of soil inorganic N mitigates the excess N leaching from soil.

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Section: Introductionmentioning

confidence: 99%

Short-Term Response of Sasa Dwarf Bamboo to a Change of Soil Nitrogen Fertility in a Forest Ecosystem in Northern Hokkaido, Japan

Watanabe

Fukuzawa

Shibata

2016

Plants

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“…Munson and Timmer 1995). Regarding nutrient uptake by growing plants (Archibold et al 2000;Shibata et al 2007), the difference in soil nitrogen content in the earlier growing seasons might be greater. As well, these sites should have a similar seed supply because of the similar distances to a surrounding mature stand (ca.…”

Section: Discussionmentioning

confidence: 98%

“…The rapid vegetation recovery would also contribute to reducing the risk of outflows of sediments and nutrients (Ahtiainen 1992). Although scarification generally increases soil microbial activity owing both to reducing nutrient uptake by plants and increasing soil temperature, the lack of soil carbon decreases the immobilization of nitrogen (Shibata et al 2007). The supply of abundant organic carbon by the soil replacement treatment, therefore, should reduce the nitrogen leaching after replacement.…”

Section: Discussionmentioning

confidence: 99%

An alternative of soil scarification treatment for forest restoration: effects of soil replacement

Aoyama

Yoshida

Kamitani

2009

Journal of Forest Research

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We examined an alternative natural regeneration practice with a scarification treatment, in which removed soil is replaced on the scarified area, in northern Japan. The effect of the soil replacement on tree establishment was quite obvious; the basal area of trees, composed mostly of Betula ermanii, in the soil-replaced site was about 150-fold greater than that of the normally treated site. The greater growth rates together with higher density, both of which seemed to be enhanced by improved (i.e., deeper, tender, and nutrient-rich) soil properties, produced the marked difference to the normally treated site. The expected enhancement of species diversity owing to utilizing buried seeds in the replaced soil was not found. The current study revealed that the soil replacement could substantially improve forest restoration management with emphasis on biomass production for large nonwooded sites.

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“…For example, nitrate leaching induced by forest management has been reported in a north Japanese forest with removal of surface soil and understory vegetation by scarification (Ozawa et al 2001;Shibata et al 2007), which is a treatment to promote regeneration of forests with avoidance of dominance of a single understory plant (Sasa senanensis). Nitrification and nitrate concentrations in soil water increased in the site with scarification, and were leached out in early spring by snow melt.…”

Section: Forest Managementmentioning

confidence: 99%

Ecological risks in anthropogenic disturbance of nitrogen cycles in natural terrestrial ecosystems

Fujimaki

Sakai

Kaneko

2009

Ecological Research

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Anthropogenic addition of reactive nitrogen (Nr) to the biosphere is increasing globally and some terrestrial ecosystems are suffering from a state of excess Nr for biological nitrogen (N) demand, termed N saturation. Here, we review the ecological risks in relation to N saturation and prospective responses to N saturation. Excess Nr increases the risks of local extinction of rare plant species, encouragement of exotic plant species, disturbance of nutrient balance in plant organs, and increase of herbivory in plant communities. On the ecosystem scale, excess bioavailable N induces forest decline, disturbance of nutrient cycling within ecosystems, depending on vegetation, soil, land-use, and N-loading history. These Nr risks will increase in the Asian region, where impacts of Nr in natural terrestrial ecosystems have been scarcely studied. Whether much of the terrestrial ecosystems on a global level are in the sate of N saturation or not is still controversial, but the potential risks of excess Nr seem to be increasing. The fundamental ways to mitigate Nr risks are to reduce Nr production, prevent Nr translocation, and promote conversion of Nr to N 2 . Temporal, but promising actions against ecological N risks may include management of forests and riparian zones, and carbon addition in grassland.

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The Effect of Treatment for Land Surface during Forest Practice on Soil Nitrogen Dynamics.

Cited by 6 publications

References 9 publications

Short-Term Response of Sasa Dwarf Bamboo to a Change of Soil Nitrogen Fertility in a Forest Ecosystem in Northern Hokkaido, Japan

Short-Term Response of Sasa Dwarf Bamboo to a Change of Soil Nitrogen Fertility in a Forest Ecosystem in Northern Hokkaido, Japan

An alternative of soil scarification treatment for forest restoration: effects of soil replacement

Ecological risks in anthropogenic disturbance of nitrogen cycles in natural terrestrial ecosystems

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