Time filter

Source Type

Lin Y.,Fujian Agriculture and forestry University | Lin Y.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | Deng H.,Fujian Agriculture and forestry University | Du K.,Fujian Agriculture and forestry University | And 13 more authors.
Soil and Tillage Research | Year: 2017

China's 2008 8.0 Ms Wenchuan earthquake and subsequent secondary geo-hazards caused widespread damage to vegetation-soil system in northwest China. In order to evaluate changes in soil quality status after damage, we established four treatments in the earthquake-affected area, including disturbed and treated sites in a dry hot climate (D-t), undisturbed sites in a dry hot climate (D-ud), disturbed and treated sites in a subtropical humid monsoon climate (S-t), and undisturbed sites in a subtropical humid monsoon climate (S-ud). Forty-eight soil samples were collected and analyzed for 27 soil physical, chemical, and biological properties. Principal components analysis (PCA) was conducted with 26 variables in significant differences except total potassium among D-t, D-ud, S-t, and S-ud. A minimum data set of soil indicators was established with available potassium (AK), K+, total salt content (TSC), and total phosphorus (TP) based on PCA results. Using the Integrated Quality Index (IQI) equation, we calculated the soil quality index (SQI). S-ud, S-t, D-ud, and D-t had mean SQI scores of 0.566, 0.275, 0.537, and 0.374, respectively. Our results showed that undisturbed sites had better soil quality compared to disturbed and treated sites based on their superior physical indicators, superior nutrient conditions, and higher microbial carbon source metabolic diversity, especially in the subtropical humid monsoon climate with frequent rainfall. The SQI reflects the variations observed in earthquake-affected area and may be considered as a suitable technique for detecting changes in soils. Our results will also supply the fundamental data for evaluating the effects, design, and implementation of restoration programs. © 2016 Elsevier B.V.


Chen A.-M.,Fujian Agriculture and forestry University | Yan S.-W.,Fujian Agriculture and forestry University | Lin Y.-M.,Fujian Agriculture and forestry University | Lin Y.-M.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | And 9 more authors.
Beijing Linye Daxue Xuebao/Journal of Beijing Forestry University | Year: 2016

Soil anti-erodibility is one of the important parameters for evaluating the ability of soil resistance to soil erosion. Aiming to understand the effect of vegetation restoration on soil erosion durability in the area with high-frequency debris flow, we determined the soil anti-erodibility at different ages of Leucaena leucocephala forests by using principal component analysis based on the data collected from the field and analyzed in the laboratory. The results showed that: 1) as the age of L. leucocephala forest increased, soil permeability, structure stability and soil nutrient decreased except for the content of fine particle; 2) the comprehensive indexes of soil anti-erodibility followed the rule as 10 a > 16 a > 27 a, indicating that the soil anti-erodibility decreased with forest age in Jiangjia gully; 3) according to Pearson's correlations, all the 13 anti-erodibility indicators could be simplified to 5 indicators which were soil density, maximum water-holding capacity, the content of water-stable aggregates at size > 0.25 mm, clay content and silt content. Taking 5 selected indicators (X) as independent variables and soil anti- erodibility indicator (Y) as dependent variable, the soil anti-erodibility model was built by linear regression analysis as Y =-8.691X1 +0.054X2 +0.700X3-0.425X4-0.189X5-12.511. This result could provide a reference for the building of soil anti-erodibility assessment indicator system and its future research in the area with high-frequency debris flow. © 2016, Editorial Department of Journal of Beijing Forestry University. All right reserved.


Zhang G.S.,Fujian Agriculture and forestry University | Zhang G.S.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | Deng H.J.,Fujian Agriculture and forestry University | Deng H.J.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | And 12 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2016

To understand soil stoichiometric characteristics at different elevations in a mountainous area with high frequency debris flows, organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), total potassium (TK), and mechanical characteristics of soil from 3 elevational bands (1500-2000, 2000-2500, 2500-3000 m) were measured at different soil depths. This study also analyzed vertical variations in soil stoichiometric characteristics in these elevational gradients and its correlation with soil physical structure. SOC, TN, C:P, C:K, N:P, and N:K were positively correlated with elevation, while TP, TK, and P:K were negatively correlated with elevation. SOC had the strongest relationship with elevation, followed by total N, P, and K. The vertical distribution of SOC, TN, TP, TK, and stoichiometric ratio varied with elevation.SOC and TN decreased with soil depth, but there was no clear relationship with TP, TK, or stoichiometric ratio. Within each elevational band, soil stoichiometric characteristics did not differ significantly between forest communities and shrub-meadow communities; both presented the same pattern as the elevation changed. In the shrub-meadow community, C:N was significantly correlated with above ground vegetation cover. In the forest community, P:K was significantly correlated with mean tree height. Differences in soil physical structure were the key factor linked to changes in soil stoichiometric characteristics. C:P, C:K, N:P, and N:K had a positive exponential relationship with soil water content and sand content, and a negative exponential relationship with clay content. © 2016, Ecological Society of China. All rights reserved.


Zhang G.-S.,Fujian Agriculture and forestry University | Zhang G.-S.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | Lin Y.-M.,Fujian Agriculture and forestry University | Lin Y.-M.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | And 10 more authors.
Huanjing Kexue/Environmental Science | Year: 2015

The MS8.0 Wenchuan earthquake in 2008 led to huge damage to land covers in northwest Sichuan, one of the critical fragile eco-regions in China which can be divided into Semi-arid dry hot climate zone (SDHC) and Subtropical humid monsoon climate zone (SHMC). Using the method of Bilog-ECO-microplate technique, this paper aimed to determine the functional diversity of soil microbial community in the earthquake-affected areas which can be divided into undamaged area (U), recover area (R) and damaged area without recovery (D) under different climate types, in order to provide scientific basis for ecological recovery. The results indicated that the average-well-color-development (AWCD) in undamaged area and recovery area showed SDHC>SHMC, which was contrary to the AWCD in the damaged area without recovery. The AWCD of damaged area without recovery was the lowest in both climate zones. The number of carbon source utilization types of soil microbial in SHMC zone was significantly higher than that in SDHC zone. The carbon source utilization types in both climate zones presented a trend of recover area>undamaged area>damaged area without recovery. The carbon source metabolic diversity characteristic of soil microbial community was significantly different in different climate zones. The diversity index and evenness index both showed a ranking of undamaged area>recover area>damaged area without recovery. In addition, the recovery area had the highest richness index. The soil microbial carbon sources metabolism characteristic was affected by soil nutrient, aboveground vegetation biomass and vegetation coverage to some extent. In conclusion, earthquake and its secondary disasters influenced the carbon source metabolic diversity characteristic of soil microbial community mainly through the change of aboveground vegetation and soil environmental factors. ©, 2015, Science Press. All right reserved.


Aimin C.,Fujian Agriculture and forestry University | Haojun D.,Fujian Agriculture and forestry University | Siwei Y.,Fujian Agriculture and forestry University | Yongming L.,Fujian Agriculture and forestry University | And 8 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2016

Aiming to understand the effect of vegetation type on soil quality in the area of fragile ecological environment, this research studied the soil quality of different vegetation types at Jiangjia Gully, Yunnan, China in the provenance slope of the area of high-frequency debris flow. The physical and chemical properties and enzyme activities of the soil of Arachis hypogage (AH), Punica granatum (PG), Heteropogon contortus (HC), Dodonaea viscose (DV) and Leucaena leucocephala (LL) were analyzed and investigated their soil quality by the integrated soil quality index. The results showed that: (1) The soil permeability and structure stability were better in HC and DV than in LL, AH and PG; the water retention was the best in DV but inferior in LL and AH. (2) The contents of soil organic matter, total-N, and alkali-hydrolysable-N were significantly higher in DV and HC than in LL, PG and AH; the contents of available-P and available-K was the highest in PG. (3) The situation of redox was the best in HC and the worst in AH. (4) The integrated soil quality index was in the order of DV (0.68) > HC (0.60) > PG (0.56) > LL (0.45) > AH (0.33). The results indicated that DV and HC are more helpful in improving the soil quality, and it is advisable to take shrub (DV) and grass (HC) into priority consideration for vegetation restoration in the area of high-frequency debris flow. Besides, we should focus on reducing tillage and protecting the fertilizer of soil in this area.


Deng H.,Fuzhou University | Deng H.,Longyan City Research Institute of Forestry science | Hong T.,Fuzhou University | Hong T.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | And 8 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2014

This research tried to report for the first time the production of lipid by endophytic fungi isolated from Pinus massoniana, with an objective to promote comprehensive exploitation and utilization of Pinus massoniana. Twenty-one endophytic fungi strains were isolated from the roots, stalks and leaves of Pinus massoniana. Lipids of four dominant strains were extracted by acid-heating method to determine the lipid content and analyze the lipid components by GC-MS. The results showed that all of the four endophytic fungi could produce lipid. The average lipid contents were up to 20%, and the highest content 3.0.13%. The fatty acid contents of the four endophytic fungi accounted for 64% of the lipids, and the unsaturated fatty acid contents over 46%. The main components of the lipid were palmitate, stearic acid, oleic acid, linoleic acid and elaidic acid etc., with oleic acid of the highest proportion, which was up to 42.08%. Therefore, the endophytic fungi isolated from Pinus massoniana can be used for producing lipid as a new kind of microbial resource with great value of exploitation and utilization.


Li J.,Fujian Agriculture and forestry University | Li J.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | Liu Y.,Fujian Agriculture and forestry University | Liu Y.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | And 12 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2013

In order to investigate the resistance of Casuarina equisetifolia L. to autotoxicity and to provide scientific basis for continuous planting of C. equisetifolia, clones of 'Huian No.1' C. equisetifolia were water cultivated to study the effects of chlorophyll fluorescence in branchlet under allelochemical stress (of seven concentrations: 0, 12.5, 25, 50, 100, 200 and 400 mg L -1) induced by quercetin-3-α-araboside (allelochemical A) and quercetin-3-β-glucoside (allelochemical B). The membership function of fuzzy mathematics was used to analyze the tolerance abilities of C. equisetifolia seedling under different allelochemicals stress. The results showed slight variations in F0, Fm, Fv/F 0and Fv/Fm of the branchlet under slight allelochemicals stress (12.5, 25, 50 mg L-1). The F v/Fm was observed to maintain 78% of normal photosynthesis reaction. The F0, qN, Drate;, LPAR of the branchlet significantly (P < 0.05) increased with the concentration of allelochemicals (100, 200, 400 mg L-1), while the values of F m, Fv/Fm, FvF0, P rate, ΦPPSII, qp decreased significantly {P < 0.05). Allelochemicals stress damaged the function of PSII reaction center and decreased the photochemical electron transfer rate, which led to the structural damage of photosynthetic organs and functional degradation in photosynthetic ability. The range of chlorophyll fluorescence parameters in branchlet of C. equisetifolia varied with different allelochemicals. the seedlings had better stress tolerance against allelochemical A than allelochemical B.


Hu X.,Fujian Agriculture and forestry University | Wu C.,Fujian Agriculture and forestry University | Wu C.,Wuyi University | Hong W.,Fujian Agriculture and forestry University | And 6 more authors.
Ecological Indicators | Year: 2014

Rapid human-driven conversion of global forest cover is contributing to the loss of habitat, biodiversity, and climate change. Even in a relatively short time interval and a small local region with relatively homogeneous biophysical interference, forest cover may be changed considerably by human disturbances. To better understand human influences on the pattern of forest cover change (FCC), we investigated the factors of FCC from 2007 to 2012 by combining the broad socio-economic information at the census block group level with the site-specific information measured at the pixel level. Taking the upstream area of the Minjiang River, China, as a case study, the result indicated that the major forest cover classes had a high rate of persistence in area size during the study period, while conversions among forest covers and into non-forest land occurred frequently, accounting for 5.4% of the landscape. The change of mixed forest was among the greatest one, decreasing sharply from 24.0% to 21.6% of the entire landscape, which converted predominantly into coniferous forest from 2007 to 2012. Additionally, 90.0% of the net gain to non-forest land was largely supplied by coniferous forest and mixed forest. The findings corroborate that human-driven conversions of forest covers have deleterious effects on biodiversity conservation in the upstream area of the Minjiang River. Furthermore, a binary logistic regression model was used to observe the biophysical/socio-economic drivers of FCC. We identified a FCC pattern during the period of study that was associated with collective- or enterprise-owned forests, low level of protection intensity forests, and the regions with high growth rates of fiscal revenue and far away from the city center. These results confirm that as a whole the relevant governments play an important role in the FCC in the region. This study is important for the relevant policy-makers and planners to better understand the underlying patterns and causes of this landscape change, to develop effective strategies for conserving biodiversity. © 2014 Elsevier Ltd.


Yan S.,Fujian Agriculture and forestry University | Yan S.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | Du K.,Fujian Agriculture and forestry University | Du K.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | And 13 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2016

Plant community structure, soil nutrients and soil enzyme activity have a coupling relationship in relation to the vegetation types. This research aimed to find the relationship between structure of plant community and soil nutrients and enzymes in an area with frequent debris flow. We took as the main research object of 5 typical vegetation types in the Jiangjia Gulley including Heteropogon contortus, Salix myrtillacea and Leucaena leucocephala of 9 years, 15 years and 26 years. We analyzed the characteristics and correlation of plant diversity with soil nutrients and soil enzyme activity by methods of field investigation and laboratory analysis. The results showed a sequence of plant diversity as Salix myrtillacea > Heteropogon contortus > 26-year Leucaena leucocephala > 15-year Leucaena leucocephala > 9-year Leucaena leucocephala. The contents of the soil organic matter, the C:N and C:P were all higher in Heteropogon contortus and Salix myrtillacea than in Leucaena leucocephala of all three ages (P < 0.05). The Simpson and Shannon-Wiener plant diversity indices showed a significant positive correlation with soil organic matter and Invertase (P < 0.05). Finally, the organic matter showed an extremely significant positive correlation with Invertase (P < 0.01). The results indicated that higher plant diversity index in different vegetation communities can help the accumulation of soil fertility and can improve soil biological activity in areas with frequent debris flow.


Cui X.,Fujian Agriculture and forestry University | Zhang L.,Fujian Agriculture and forestry University | Lin Y.,Fujian Agriculture and forestry University | Lin Y.,Key Laboratory for Forest Ecosystem Process and Management of Fujian Province | And 11 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2015

With a purpose of raising serial land productivity, this study aimed to investigate the correlation between high-efficiency phosphate-solubilizing bacteria strains and soil phosphorus content. The pot experiment used three high-efficiency phosphate-solubilizing bacteria strains P19, P7, and YP17 pre-screened as phosphate-solubilizing bacteria agent, potted Eucalyptus grandis × E. urophylla seedlings as the object of study, three kinds of forest soils and latosol never covered by vegetation as a stroma. The experiment set treatments of three bacteria concentrations: high concentration of 107 cfu mL-17cfu mL-1 and low concentration of 106 cfu mL-1 medium concentration of 0.5 × 10besides a blank control (CK). The results showed that the available phosphorus content was not obviously different for treatments of different bacterial concentrations. Multiple comparison showed that medium concentration had relatively better promoting effect on the soil of north broad-leaved forest (NBL); soil of south coniferous forest (SC) and south latosol (SL) did better with low bacterial concentration; but the effect on available phosphorus content of the three concentrations was not significant in soil of south broad-leaved forest (SBL). The comparison between effects of different single phosphate-solubilizing bacteria and mixed phosphate-solubilizing bacteria on soil available phosphorus content showed that mixed bacteria had better promoting effect than single bacteria as a whole, with soil available phosphorus content in three forests except SL being significantly improved by phosphate-solubilizing bacteria treatment. In particular, P7YP17, P7 and P19YP17 treatments were the most effective in NBL soil, P7, P7YP17, and P19YP17 the most effective in SBL soil, P19YP17, P19P7YP17, and P7YP17 the most effective in SC soil; P7YP17 and P19 promoted the soil available phosphorus in SL soil though not significantly. The results indicated that combination treatment of organic phosphorus bacteria and inorganic phosphorus bacteria is effective to promote soil available phosphorus.

Loading Key Laboratory for Forest Ecosystem Process and Management of Fujian Province collaborators
Loading Key Laboratory for Forest Ecosystem Process and Management of Fujian Province collaborators