Impact of competition on the growth of Pinus tabulaeformis in response to climate on the Loess Plateau of China

Chinese pine (Pinus tabulaeformisCarr.) is widely planted for restoration in destroyed ecosystems of the Loess Plateau in China. Although soil microbial communities are important subsurface components of the terrestrial ecosystems, little is known about fungal and bacterial communities in the rhizosphere of planted and naturalP. tabulaeformisforests in the region. In this study, fungal and bacterial communities in the rhizosphere ofP. tabulaeformiswere analyzed by nested PCR-DGGE (denaturing gradient gel electrophoresis). Diversity analysis revealed that the values of the Shannon-Wiener index (H) and the Simpson index (D) of fungal communities were higher in natural secondary forests than in plantations except for the 3-year-old site. Moreover, the values of species richness,H, andDof the bacterial communities were also higher in the former. Totally, 18 fungal and 19 bacterial DGGE band types were successfully retrieved and sequenced. The dominant fungi in the rhizosphere ofP. tabulaeformisbelonged to the phylum of Basidiomycota, while the dominant bacteria belonged to the phylum of Proteobacteria. Principal component analysis indicated that fungal and bacterial species were more unitary in plantations than in natural secondary forests, and the majority of them were more likely to appear in the latter. Correlation analysis showed no significant correlation between the fungal and bacterial community diversities.

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Effects of terracing on soil water and canopy transpiration of Pinus tabulaeformis in the Loess Plateau of China

Ecological Engineering ◽

10.1016/j.ecoleng.2017.02.044 ◽

2017 ◽

Vol 102 ◽

pp. 557-564 ◽

Cited By ~ 13

Author(s):

Handan Zhang ◽

Wei Wei ◽

Liding Chen ◽

Lixin Wang

Keyword(s):

Soil Water ◽

Loess Plateau ◽

Pinus Tabulaeformis ◽

The Loess Plateau ◽

Canopy Transpiration

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Effects of litter cover on partitioning of natural rainfall for plantation Pinus tabulaeformis forest in the Loess Plateau of China

10.5194/egusphere-egu21-7695 ◽

2021 ◽

Author(s):

Yongsheng Cui ◽

Chengzhong Pan ◽

Geng Zhang ◽

Zhanwei Sun ◽

Fuxing Wang

Keyword(s):

Loess Plateau ◽

Surface Runoff ◽

Rainy Season ◽

Soil Layer ◽

Bare Soil ◽

Pinus Tabulaeformis ◽

Soil Water Storage ◽

The Loess Plateau ◽

Light Rain ◽

Litter Cover

&#160; &#160; &#160; Litter accumulates yearly since vegetations were widely planted for reforestation, and it plays an important role in hydrologic cycling. There is little information on the effects of litter on re-allocation of rainfall processes. Eight runoff plots were established in the Pinus tabulaeformis stand with four litter (needle-leaf) masses (0, 0.6, 1.2, 1.8 kg/m2), and the surface runoff (R), evaporation (E), infiltration and soil moisture dynamics were measured throughout the mainly rainy season from August 4 to September 28 in the Loess Plateau. The results showed that, soil evaporation mainly occurred in daytime for bare soil, and decreased with increasing litter masses, and litter cover is prone to hinder the heat and water exchange between soil and atmosphere, especially for the soil layer 0~5 cm. Litter cover greatly decreased surface runoff, and it may hinder infiltration at the beginning of rainy season, but increasing soil water storage (SWS) with deeper infiltration depth for the long run, especially for the litter masses 1.2 and 1.8 kg/m2. With the litter covered, the ratio of R to precipitation (P) was less than 10%, no matter it was heavy rain or light rain. However, the proportion of R was amplified when the rainfall was intense for the bare soil. And the ratio of E to P was always below 10% for all treatments, except for light rainfall. With the increased litter masses, the proportion of R and E all decreased, and the SWS/P has well nonlinear positive relationship with litter masses, and it was proved that more than a half of rainfall was stored even for bare soil. This study may helpful to better understanding the effects of litter on hydrological response, and promotes practical measurements to the management of precipitation in a forest stand view.

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