Soil microbial biomass carbon and nitrogen in pure and mixed stands of Pinus massoniana and Cinnamomum camphora differing in stand age

Wen, Li; Lei, Pifeng; Xiang, Wenhua; Yan, Wende; Liu, Shuguang

doi:10.1016/j.foreco.2014.05.037

Cited by 64 publications

(39 citation statements)

References 45 publications

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“…Our data for the same sites also suggested that fine roots mostly assemble in the upper soil, and fine-root overyielding occurred in the topsoil layer (0-10 cm; see Table S1 in the Supplement). Also, in our previous study (Wen et al, 2014), the ratio of soil microbial biomass to soil organic carbon was the lowest in topsoil, which may suggest a lower mineralization rate in deeper soil and make the accumulation of OC and N stocks in deeper soil along the chronosequence more pronounced over the topsoil layer. Here we only collected the soil down to 30 cm of depth, and the effects of species diversity and species identity on the deeper soil merits further investigation to improve model parameters of soil OC and N processes in the deep soil profile.…”

Section: Soil Organic Carbon and Nitrogen Stocksmentioning

confidence: 62%

“…A large amount of soil nitrogen us stored in soil organic matter, and with the decomposition of soil organic matter, nitrogen will be released and able to be taken up by plants or leaching, as reported in our previous study. Soil nitrogen concentration positively correlated to soil organic carbon concentration (Wen et al, 2014), and thereby the soil nitrogen stocks to some degree shared similar patterns of soil OC stocks under the same circumstances. As Hume et al (2016) discussed, the accumulation of soil nitrogen may be slower than carbon because nitrogen is progressively locked up in live biomass, which is likely the explanation for why the soil nitrogen stock changed less significantly with stand ages and between different stand types compared with soil OC stocks here.…”

Section: Soil Organic Carbon and Nitrogen Stocksmentioning

confidence: 76%

“…Therefore, we think these two sites are suitable for our experiment since our purpose here was to evaluate the admixing effects on soil C and N stocks by comparing mixed forests and corresponding monocultures at the same age rather than comparing soil C and N in forests at different ages. For more detailed information about the experimental site and soil conditions, refer to Wen et al (2014).…”

Section: Study Sitementioning

confidence: 99%

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Accumulation of soil organic C and N in planted forests fostered by tree species mixture

2017

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Abstract. With the increasing trend of converting monocultures into mixed forests, more and more studies have been carried out to investigate the admixing effects on tree growth and aboveground carbon storage. However, few studies have considered the impact of mixed forests on belowground carbon sequestration, particularly changes in soil carbon and nitrogen stocks as a forest grows. In this study, paired pure Pinus massoniana plantations, Cinnamomum camphora plantations and mixed Pinus massoniana-Cinnamomum camphora plantations at ages of 10, 24 and 45 years were selected to test whether the mixed plantations sequestrate more organic carbon (OC) and nitrogen (N) in soils and whether this admixing effect becomes more pronounced with stand ages. The results showed that tree species identification, composition and stand age significantly affected soil OC and N stocks. The soil OC and N stocks were the highest in mixed Pinus-Cinnamomum stands compared to those in counterpart monocultures with the same age in the whole soil profile or specific soil depth layers (0-10, 10-20 and 20-30 cm) for most cases, followed by Cinnamomum stands and Pinus stands with the lowest. These positive admixing effects were mostly nonadditive. Along the chronosequence, the soil OC stock peaked in the 24-year-old stand and was maintained as relatively stable thereafter. The admixing effects were also the highest at this stage. However, in the topsoil layer, the admixing effects increased with stand ages in terms of soil OC stocks. When comparing mixed Pinus-Cinnamomum plantations with corresponding monocultures within the same age, the soil N stock in mixed stands was 8.30, 11.17 and 31.45 % higher than the predicted mean value estimated from counterpart pure species plantations in 10-, 24-and 45-year-old stands, respectively. This suggests that these admixing effects were more pronounced along the chronosequence.

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Section: Soil Organic Carbon and Nitrogen Stocksmentioning

confidence: 62%

Section: Soil Organic Carbon and Nitrogen Stocksmentioning

confidence: 76%

Section: Study Sitementioning

confidence: 99%

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Accumulation of soil organic C and N in planted forests fostered by tree species mixture

2017

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“…As SOC and TN are substrates of MB, their variation would lead to corresponding changes of MBC and MBN (Moore, Klose, & Tabatabai, ; Wen, Lei, Xiang, Yan, & Liu, ). This is corroborated by our study.…”

Section: Discussionmentioning

confidence: 99%

Forage grass cultivation increases soil organic carbon and nitrogen pools in a karst region, southwest China

Liu

Chen

et al. 2018

Land Degrad Dev

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Whether conservation agriculture systems can increase soil organic carbon (SOC) and total nitrogen (TN) pools remains unresolved. We measured SOC and TN pools in maize–soybean rotation fields and three types of conservation agriculture systems with mature forests being selected for comparison in southwest China's karst areas. The three types of conservation agriculture systems were fields of mulberry, forage grass, and sugarcane. The objective was mainly to evaluate whether replacement of maize–soybean fields by the other three types of agricultural fields would significantly increase SOC and TN pools. Across the 0–30 cm soil profile, SOC and TN pools were not significantly higher in the mulberry and sugarcane fields than in the maize–soybean fields (47.42 ± 6.34 Mg C ha−1 and 5.47 ± 0.49 Mg N ha−1). Nevertheless, SOC and TN pools in the forage grass fields (74.12 ± 5.30 Mg C ha−1 and 7.09 ± 0.41 Mg N ha−1) were higher by 56.3 and 29.4% relative to the maize–soybean fields, but were lower by 38.3% and 21.8% compared to the forests, respectively. Microbial biomass C (MBC) and N (MBN) concentrations varied in similar patterns as SOC and TN pools. The MBC:SOC and MBN:TN ratios were higher in the forage grass fields, suggesting increased soil organic matter quality compared to the other types of agricultural fields. Our findings suggest that whether conservation agriculture can enhance SOC and TN pools largely depends on crop type with forage grass cultivation being identified as an efficient solution to promote SOC and TN pools.

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“…Converting monocultures into mixed forests has become a common trend of forest management in recent decades owing to enhancement of ecosystem functioning and sustainability due to complementary resource use, environmental benefits and improved soil properties in mixed forests (Wen et al, 2014). Mixed species plantations have the potential to provide increased benefits in terms of carbon sequestration, biodiversity, forest products, bush foods, and increased resilience to diseases and pests (Hung et al, 2011;Le et al, 2014, Nguyen et al,.…”

Section: Amirahmadi E; Hojjati Sm; Poormajidian Mr; Najjari Amentioning

confidence: 99%

Evaluation of Carbon sequestration in pure and mixed plantations of <i>Cupressus arizonica</i>

Amirahmadi¹,

Hojjati²,

Poormajidian³

et al. 2017

Journal of Applied Sciences and Environmental Management

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ABSTRACT:The present study was conducted to investigate the effect of tree mixture on Carbon sequestration in cupressus arizonica plantations. Emission of carbon dioxide via human activities is known as the main cause of global warming. Therefore, in this study, soil carbon sequestration in mixed and pure stands was measured in order to compare the effect of tree mixture on the amount of carbon stored in the top mineral soil layer. The study site was Khargosh Valley Forest Park, located in Tehran province. This study included 4 different type of stands, the pure Cupressus arizonica, the pure Pinus eldarica, the mixed Cupressus arizonica and Pinus eldarica and the mixed Cupressus arizonica with deciduous hardwoods. Sampling method was done with a Systematic random network with dimensions 75 × 75 m. Samples parts were Square with dimensions of 20 x 20 m. At each plot center, forest floor was sampled from the first 10 cm of soil. To analyze the data one way analyses of variance (ANOVA) in SPSS v.20 was used to assess the Soil parameters. Tukey's tests were used to test significant effects (p ≤ 0.05). Our results showed that the mean Carbon sequestration in the mixed plantations of Cupressus arizonica with deciduous hardwoods trees soils was greater than the other stands which in the standing mixed Cupressus arizonica and Pinus eldarica was lower than the pure stands. Our results Recommended for establishment ofconifer plantation, used mixed culture of Conifers with broadleaf Instead of pure cultures conifers. ©JASEM http://dx.doi.org/10.4314/jasem.v20i4.10

show abstract

Soil microbial biomass carbon and nitrogen in pure and mixed stands of Pinus massoniana and Cinnamomum camphora differing in stand age

Cited by 64 publications

References 45 publications

Accumulation of soil organic C and N in planted forests fostered by tree species mixture

Accumulation of soil organic C and N in planted forests fostered by tree species mixture

Forage grass cultivation increases soil organic carbon and nitrogen pools in a karst region, southwest China

Evaluation of Carbon sequestration in pure and mixed plantations of <i>Cupressus arizonica</i>

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