The measurement of15N in soil and plant material

Pruden, G.; Powlson, DS; Jenkinson, D. S.

doi:10.1007/bf01048795

Cited by 88 publications

(28 citation statements)

References 8 publications

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“…All the samples for 15 N analysis followed the methods described by Buresh et al (1982) and Pruden et al (1985), except NH 4 + -N and NO 3 À -N samples. (Zogg et al 2000).…”

Section: N Analysis and Calculationmentioning

confidence: 99%

Nitrogen deposition and carbon sequestration in alpine meadows

Ouyang

Cao

et al. 2004

Biogeochemistry

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Abstract. Nitrogen deposition experiments were carried out in alpine meadow ecosystems in Qinghai-Xizang Plateau in China, in order to explore the contribution of nitrogen deposition to carbon sequestration in alpine meadows. Two methods were used in this respect. First, we used the allocation of 15 N tracer to soil and plant pools. Second, we used increased root biomass observed in the nitrogen-amended plots. Calculating enhanced carbon storage, we considered the net soil CO 2 emissions exposed to nitrogen deposition in alpine meadows. Our results show that nitrogen deposition can enhance the net soil CO 2 emissions, and thus offset part of carbon uptake by vegetation and soils. It means that we have to be cautious to draw a conclusion when we estimate the contribution of nitrogen deposition to carbon sequestration based on the partitioning of 15 N tracer in terrestrial ecosystems, in particular in N-limited ecosystems. Even if we assess the contribution of nitrogen deposition to carbon sequestration based on increased biomass exposed to nitrogen deposition in terrestrial ecosystems, likewise, we have to consider the effects of nitrogen deposition on the soil CO 2 emissions.

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“…All the samples for 15 N analysis followed the methods described by Buresh et al (1982) and Pruden et al (1985), except NH 4 + -N and NO 3 À -N samples. (Zogg et al 2000).…”

Section: N Analysis and Calculationmentioning

confidence: 99%

Nitrogen deposition and carbon sequestration in alpine meadows

Ouyang

Cao

et al. 2004

Biogeochemistry

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“…Soil pH was measured with a glass electrode in a 1:2 soil-to-water ratio. TN was determined by Kjeldahl digestion with a salicylic acid modification [21]; soil bulk density, TP, and TK were measured using standard methods [22]; and SOC using the method described by Kalembasa and Jenkinson [23]. Table 1 shows detailed soil properties for each N addition plot.…”

Section: Soil Properties and Microbial Biomassmentioning

confidence: 99%

Effect of Nitrogen Addition on Soil Respiration in a Larch Plantation

Zhu

Chen

Cheng

et al. 2017

Pol. J. Environ. Stud.

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Knowledge about the impact of nitrogen (N) addition on soil respiration (Rs) is critical for understanding soil carbon (C) balance and its responses to climate change. We conducted a long-term field experiment to evaluate the response of Rs to N addition in a larch (Larix principis-rupprechtii) plantation during the growing season in northern China. We applied four N (in the form of NH 4 NO 3 ) levels, i. ) monthly starting in June 2015. The results showed that N addition -especially N2 and N3 levels -significantly stimulated Rs. N1 and N2 levels resulted in the increase of Rs in a short time, whereas the duration of N3 level can last across the whole month or at least 10 days. The results highlight the need for improving the Rs sampling interval after N addition to ensure more accurate evaluation of C emission. Soil temperature and soil moisture together explained more variations of Rs. N addition exhibited a slight increase in the sensitivity of Rs to temperature (Q 10 ), but no significant differences were found for the Q 10 among N levels.

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“…Total N was analyzed using Kjeldahl's digestion with a salicylic acid modification [39], while available phosphorus (P) and potassium (K) were analyzed using the NaOH method [40]. Soil organic carbon was measured following the method described by Kalembasa and Jenkinson [41].…”

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Effects of Nitrogen Addition on Leaf Decomposition of Single-Species and Litter Mixture in Pinus tabulaeformis Forests

Zhao

et al. 2015

Forests

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Abstract:The litter decomposition process is closely correlated with nutrient cycling and the maintenance of soil fertility in the forest ecosystem. In particular, the intense environmental concern about atmospheric nitrogen (N) deposition requires a better understanding of its influence on the litter decomposition process. This study examines the responses of single-species litter and litter mixture decomposition processes to N addition in Chinese pine (Pinus tabulaeformis Carr.) ecosystems. Chinese pine litter, Mongolian oak (Quercus mongolica Fisch. ex Ledeb.) litter, and a pine-oak mixture were selected from a plantation and a natural forest of Chinese pine. Four N addition treatments, i.e., control (N0: 0 kg N ha´1¨year´1), low-N (N1: 50 kg N ha´1¨year´1), medium-N (N2: 100 kg N ha´1¨year´1), and high-N (N3: 150 kg N ha´1¨year´1), were applied starting May 2010. In the plantation, N addition significantly stimulated the decomposition of the Chinese pine litter. In the natural forest, N addition had variable effects on the decomposition of single-species litter and the litter mixture. A stimulatory effect of the high-N treatment on the Chinese pine litter decomposition could be attributed to a decrease in the substrate C:N ratio. However, an opposite effect was found for the Mongolian oak litter decomposition. The stimulating effect of N addition on the Chinese pine litter may offset the suppressive effect on the Mongolian oak litter, resulting in a neutral effect on the litter mixture. These results suggest that the different responses in decomposition of single-species litter and the litter mixture to N addition are mainly attributed to litter chemical composition. Further investigations are required to characterize the effect of long-term high-level N addition on the litter decomposition as N deposition is likely to increase rapidly in the region where this study was conducted.

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The measurement of15N in soil and plant material

Cited by 88 publications

References 8 publications

Nitrogen deposition and carbon sequestration in alpine meadows

Nitrogen deposition and carbon sequestration in alpine meadows

Effect of Nitrogen Addition on Soil Respiration in a Larch Plantation

Effects of Nitrogen Addition on Leaf Decomposition of Single-Species and Litter Mixture in Pinus tabulaeformis Forests

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