Effects of age and density of Pinus sylvestris var. mongolica on soil moisture in the semiarid Mu Us Dunefield, northern China

2020 ◽  
Vol 473 ◽  
pp. 118313
Author(s):  
Weige Nan ◽  
Fei Ta ◽  
Xiaoqiang Meng ◽  
Zhibao Dong ◽  
Nan Xiao
Keyword(s):  
Soil Moisture ◽  
Pinus Sylvestris ◽  
Northern China

Effects of litter types, microsite and root diameters on litter decomposition in Pinus sylvestris plantations of northern China

2013 ◽  
Vol 374 (1-2) ◽  
pp. 677-688 ◽  
Author(s):  
Wei Wang ◽  
Xinyue Zhang ◽  
Na Tao ◽  
De Ao ◽  
Wenjing Zeng ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Litter Decomposition ◽  
Northern China

Combined effects of site preparation, soil properties, and sowing date on the establishment of Pinus sylvestris and Picea abies from seeds

2003 ◽  
Vol 33 (5) ◽  
pp. 931-945 ◽  
Author(s):  
Michelle de Chantal ◽  
Kari Leinonen ◽  
Hannu Ilvesniemi ◽  
Carl Johan Westman
Keyword(s):  
Soil Moisture ◽  
Picea Abies ◽  
Pinus Sylvestris ◽  
Soil Properties ◽  
Seedling Emergence ◽  
Growing Season ◽  
Sowing Date ◽  
Site Preparation ◽  
Winter Mortality ◽  
Frost Heaving

The aim of this study is to determine the effect of site preparation on soil properties and, in turn, the emergence, mortality, and establishment of Pinus sylvestris L. (Scots pine) and Picea abies (L.) Karst. (Norway spruce) seedlings sown in spring and summer along a slope with variation in soil texture and moisture. Three site preparation treatments of varying intensities were studied: exposed C horizon, mound (broken L–F–H–Ae–B horizons piled over undisturbed ground), and exposed Ae–B horizons. Seedling emergence was higher in the moist growing season than in the dry one. During a dry growing season, mounds and exposed C horizon had negative effects on soil moisture that increased mortality. Moreover, frost heaving was an important cause of winter mortality on mounds and exposed C horizon, whereas frost heaving was low on exposed Ae–B horizons, even though soil moisture and the content of fine soil particles (<0.06 mm) were high. Frost heaving mortality was higher for summer-sown than for spring-sown seedlings and for P. abies than for P. sylvestris. Growing season mortality was high following a winter with frost heaving, suggesting that roots were damaged, thereby making seedlings more susceptible to desiccation.

scholarly journals Temperature and moisture dependence of daily growth of Scots pine (Pinus sylvestris L.) roots in Southern Finland

2019 ◽  
Vol 40 (2) ◽  
pp. 272-283
Author(s):  
Yiyang Ding ◽  
Pauliina Schiestl-Aalto ◽  
Heljä-Sisko Helmisaari ◽  
Naoki Makita ◽  
Kira Ryhti ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Growth Patterns ◽  
Root Production ◽  
Summer Drought ◽  
Daily Growth ◽  
Drought Effect ◽  
Fibrous Roots ◽  
Root Types

Abstract Scots pine (Pinus sylvestris L.) is one of the most important conifers in Northern Europe. In boreal forests, over one-third of net primary production is allocated to roots. Pioneer roots expand the horizontal and vertical root systems and transport nutrients and water from belowground to aboveground. Fibrous roots, often colonized by mycorrhiza, emerge from the pioneer roots and absorb water and nutrients from the soil. In this study, we installed three flatbed scanners to detect the daily growth of both pioneer and fibrous roots of Scots pine during the growing season of 2018, a year with an unexpected summer drought in Southern Finland. The growth rate of both types of roots had a positive relationship with temperature. However, the relations between root elongation rate and soil moisture differed significantly between scanners and between root types indicating spatial heterogeneity in soil moisture. The pioneer roots were more tolerant to severe environmental conditions than the fibrous roots. The pioneer roots initiated elongation earlier and ceased it later than the fibrous roots. Elongation ended when the temperature dropped below the threshold temperature of 4 °C for pioneer roots and 6 °C for fibrous roots. During the summer drought, the fibrous roots halted root surface area growth at the beginning of the drought, but there was no drought effect on the pioneer roots over the same period. To compare the timing of root production and the aboveground organs’ production, we used the CASSIA model, which estimates the aboveground tree carbon dynamics. In this study, root growth started and ceased later than growth of aboveground organs. Pioneer roots accounted for 87% of total root productivity. We suggest that future carbon allocation models should separate the roots by root types (pioneer and fibrous), as their growth patterns are different and they have different reactions to changes in the soil environment.

scholarly journals Evaluation of AMSR-E—Derived Soil Moisture over Northern China

2011 ◽  
Vol 4 (4) ◽  
pp. 223-228 ◽  
Author(s):  
Zhang An-Zhi ◽  
Jia Gen-Suo ◽  
Wang He-Song ◽  
Zhao Tian-Bao ◽  
Feng Jin-Ming ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Northern China

scholarly journals Changes of Sabina vulgaris growth and of soil moisture in natural stands and plantations in semi-arid northern China

2020 ◽  
Vol 21 ◽  
pp. e00859
Author(s):  
Weige Nan ◽  
Shengquan Liu ◽  
Shujun Yang ◽  
Zhibao Dong ◽  
Junhuai Yang ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Northern China ◽  
Natural Stands ◽  
Sabina Vulgaris ◽  
Semi Arid

scholarly journals The role of sexual versus asexual recruitment of <i>Artemisia wudanica</i> in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

2016 ◽  
Author(s):  
Yongcui Wang ◽  
Busso Carlos Alberto ◽  
Deming Jiang ◽  
Musa Ala ◽  
Xuehua Li ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Transition Zone ◽  
Asexual Reproduction ◽  
Wind Erosion ◽  
Environmental Parameters ◽  
Northern China ◽  
Early Spring ◽  
Sexual And Asexual Reproduction ◽  
Negative Effect ◽  
Positive Effect

Abstract. Artemisia wudanica is an endemic, perennial, pioneering psammophyte species in the sand dune ecosystems of western Horqin Sand Land in northern China. However, no studies have addressed how sexual and asexual reproduction modes of A. wudanica perform at the transitional zones between active dune inter-dune lowlands and active dunes. In early spring, quadrats were randomly set up in the study area to monitor surviving seedling and/or ramet density and frequency coming from sexual/asexual reproduction of A. wudanica. Iron sticks were also inserted near each quadrat to determine wind erosion (WE) intensity. Additionally, soil samples were collected nearby each quadrat to test for soil moisture (SM) and organic matter (OM) contents, and pH, respectively. Surviving seedlings of A. wudanica showed an inverse response in comparison with ramets to SM, OM and WE. Soil moisture showed the most positive effect, and WE the negative effect, on surviving, sexual reproduction seedlings. Contrarily, WE had the most positive effect, and SM the negative effect, on asexual reproduction ramets. This suggests that increases in SM and decreases in WE should benefit recruitment of A. wudanica seedlings. On the contrary, ramets coming from asexual reproduction showed a different response to environmental factors in transition zone habitats. While SM was not a key constraint for the survival of seedlings, they showed a better, positive response to wind erosion environments. Overall, various study environmental parameters could be improved to foster A. wudanica invasion and settlement in the plant community through different reproductive modes, thereby promoting vegetation restoration and rehabilitation.

scholarly journals Vegetation greenness response to water availability in northern China from 1982 to 2006

2016 ◽  
Author(s):  
Zhang Fengtai ◽  
An Youzhi
Keyword(s):  
Soil Moisture ◽  
Water Availability ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Growing Season ◽  
Northern China ◽  
Entire Study ◽  
Vegetation Greenness ◽  
Spatio Temporal ◽  
Using Data

Abstract. An evaluation of the relationship between satellite-observed Normalized Difference Vegetation Index (NDVI) data as a proxy for vegetation greenness and water availability (rainfall and soil moisture) can greatly improve our understanding of how vegetation greenness responds to water availability fluctuations. Using Sen and Pearson’s correlation methods, we analyzed the spatio-temporal variation of vegetation greenness for both the entire year and the growing season (GS,4-10) in northern China from 1982 to 2006. Although, vegetation greenness and soil moisture during the study period changed significantly for the entire study area, there was no change in rainfall. Linear correlation analysis between NDVI and rainfall revealed higher correlations using data for all seasons. Higher correlations for NDVI and soil moisture were obtained using growing season data. This study highlights how strongly vegetation greenness responds to water availability dynamics, especially in the growing season period.

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