Controls of post-fire tree recruitment in Great Xing'an Mountains in Heilongjiang Province

Wenhua, 蔡文华 Cai; Yang, Jian; Zhihua, 刘志华 Liu; Yuanman, 胡远满 Hu; Shengji, 柳生吉 Liu; Guozhi, 荆国志 Jing; Zengfu, 赵增福 Zhao

doi:10.5846/stxb201105030574

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…Previous study supported our result that AGB exhibited a negative relationship with slope [62]. Slope is an important driver of water and soil nutrient mobility [67,71], and soils with high slopes tend to be dry and heavily leached of nutrients, with acidic soils [72], which is not conducive to plant growth, maintenance of diversity, and accumulation of AGB. The weak effect of elevation on AGB might be attributed to the relatively small range of elevations in the Wanglang Plot.…”

Section: Influence Of Topography and Soil On Forest Agbsupporting

confidence: 89%

Spatial Distribution and Determinants of Aboveground Biomass in a Subalpine Coniferous Forest in Southwestern China

Ni,

Xiong,

Cai

et al. 2023

Forests

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Aboveground biomass (AGB) is the most dynamic carbon pool in forest ecosystems and is sensitive to biotic and abiotic factors. Previous studies on AGB have mostly focused on tropical and temperate forests, while studies on AGB and its determinants in subalpine coniferous forests are lacking and the mechanisms are not yet clear. Here, we systematically investigated all woody plants in 630 subplots (20 m × 20 m) in the Wanglang Plot (25.2 ha) to explore the spatial distribution of AGB and the effects of topography, soil, and stand structure on AGB. The results showed that AGB varied remarkably among different subplots with an average of 184.42 Mg/ha. AGB increased significantly with aspect, soil organic matter, maximum DBH, and important value of spruce–fir, while it decreased significantly with slope, total phosphorus, and stem density. Stand structure exerted greater influences than topography and soil factors, and especially maximum DBH determines the variation of AGB. Our results are of great significance to accurately estimate and predict the productivity of this forest type, and can provide insights into the diversity maintenance of subalpine coniferous forests as well as the conservation and management of forest ecosystems.

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Section: Influence Of Topography and Soil On Forest Agbsupporting

confidence: 89%

Spatial Distribution and Determinants of Aboveground Biomass in a Subalpine Coniferous Forest in Southwestern China

Ni,

Xiong,

Cai

et al. 2023

Forests

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show abstract

“…During the operation process, a certain amount of data was randomly selected multiple times, and the influence degree of the independent variable on the dependent variable was analyzed. The remaining data was used to test the fitting result, and the average value of the multiple regression was finally taken and output (Cai et al, 2012). The R package ggplot2 was used for creating output graphs.…”

Section: Discussionmentioning

confidence: 99%

Drip irrigation with organic fertilizer application improved soil quality and fruit yield

Yuan

Lao

et al. 2020

Agronomy Journal

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Irrigation and fertilization management are important for controlling agricultural soil salinity and increasing productivity in extremely arid regions. The objective of this research was to evaluate the effects of long‐term drip irrigation and organic fertilizer application on soil salinity, fruit quality and yield of jujube [Ziziphus ziziphus (L.) Karst]. We established a 7‐yr field experiment in a desert‐oasis area in Northwest China. Six treatments were performed: CK (conventional irrigation, no fertilizer), CIMF (conventional irrigation, mineral fertilizer), CIOF (conventional irrigation, organic fertilizer), DI (drip irrigation, no fertilizer), DIMF (drip irrigation, mineral fertilizer), and DIOF (drip irrigation, organic fertilizer). The results showed that soil organic carbon (SOC) concentration in soil treated with organic fertilizer increased gradually over years. Treatment DIOF favored the accumulation of SOC with the highest content and stock after 7 yr. Lower salt content in root zone was found in DIOF after 7 yr. The yield of DIOF increased annually and reached an equilibrium level after the fourth year (14.88 to 16.69 Mg ha−1). Total carbohydrate and vitamin C (Vc) of DIOF of fruit were all significantly higher than CIOF and DIMF. The boosted regression tree showed that SOC content had the highest relative contribution rate to jujube yield. Path analysis identified the most important factor affecting SOC in the drip‐fertigation system was the input of organic fertilizer, with path coefficient 0.65. Long‐term combination of drip irrigation and organic fertilizer application would be an effective strategy maintaining productivity and improve fruit quality in extremely arid areas.

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“…The north-slope ecoregions (ecoregions 17-21) account for 40% of forests in our study area and are dominated by dahurian larch, white birch, and Korean spruce (Picea koriensis Nakai). Vegetation regeneration after fire and harvest in the north-slope ecoregions was slower than that in the south-slope ecoregions (Cai et al 2012). Soils are light clay textured and moderately drained and have a thick layer of humus.…”

Section: Study Areamentioning

confidence: 92%

Long-term effects of fire and harvest on carbon stocks of boreal forests in northeastern China

Huang

Liang

et al. 2018

Annals of Forest Science

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& Key message Fire, harvest, and their spatial interactions are likely to affect boreal forest carbon stocks. Repeated disturbances associated with short fire return intervals and harvest rotations resulted in landscapes with a higher proportion of young stands that store less carbon than mature stands. & Context Boreal forests represent about one third of forest area and one third of forest carbon stocks on the Earth. Carbon stocks of boreal forests are sensitive to climate change, natural disturbances, and human activities. & Aims The objectives of this study were to evaluate the effects of fire, harvest, and their spatial interactions on boreal forest carbon stocks of northeastern China. & Methods We used a coupled forest landscape model (LANDIS PRO) and a forest ecosystem model (LINKAGES) framework to simulate the landscape-level effects of fire, harvest, and their spatial interactions over 150 years. & Results Our simulation suggested that aboveground carbon and soil organic carbon are significantly reduced by fire and harvest over the whole simulation period. The long-term effects of fire and harvest on carbon stocks were greater than the short-term effects. The combined effects of fire and harvest on carbon stocks are less than the sum of the separate effects of fire and harvest. The response of carbon stocks was impacted by the spatial variability of fire and harvest regimes. & Conclusion These results emphasize that the spatial interactions of fire and harvest play an important role in regulating boreal forest carbon stocks.

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Controls of post-fire tree recruitment in Great Xing'an Mountains in Heilongjiang Province

Cited by 11 publications

References 5 publications

Spatial Distribution and Determinants of Aboveground Biomass in a Subalpine Coniferous Forest in Southwestern China

Spatial Distribution and Determinants of Aboveground Biomass in a Subalpine Coniferous Forest in Southwestern China

Drip irrigation with organic fertilizer application improved soil quality and fruit yield

Long-term effects of fire and harvest on carbon stocks of boreal forests in northeastern China

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