New judgement on the source of soil water in extremely dry zone

Li, Hongshou; Wang, Wanfu; Zhan, Hongbin; Qiu, Fei; An, Lizhe

doi:10.1016/j.chnaes.2009.12.001

Cited by 41 publications

(48 citation statements)

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“…The distance between each plot was less than 1 km, which avoided differences in climate and soil types. In each plot, 10 transparent polyvinyl chloride collars (PVC, 20 cm inside diameter, 12 cm in height) were inserted into the soil at a depth of 3 cm (Li et al 2010). Once installed, collars were not moved all over the study period.…”

Section: Experimental Designmentioning

confidence: 99%

Soil respiration and carbon balance in a Moso bamboo (Phyllostachys heterocycla (Carr.) Mitford cv. Pubescens) forest in subtropical China

Tang¹,

Fan²,

Qi³

et al. 2015

iForest

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© iForest -Biogeosciences and Forestry IntroductionForest ecosystems can be carbon sinks or sources depending on the balance between carbon input through photosynthesis and release from respiration (Saiz et al. 2006). In forest ecosystems, soil respiration (RS) can account for 30% to 80% of the whole ecosystem respiration (Davidson et al. 2000, Law et al. 2002, Davidson & Janssens 2006. Globally, RS is the second largest carbon exchange between the soil and atmosphere, and returns as much as 80 to 98 Pg C yr -1 back into the atmosphere (BondLamberty & Thomson 2010, Raich et al. 2002, which is more than 10 times the carbon release from fossil fuel combustion (IPCC 2007). Therefore, RS is one of the major contributors to the carbon balance, and small changes in RS rate could give rise to significant changes in atmospheric CO2 concentration, leading to feedbacks to climate change (Ryan & Law 2005). Although the significance of RS for carbon balance on a regional and even the global scale has been demonstrated, there is still much to understand about biotic or abiotic controllers of RS and its source components (Gomez-Casanovas et al. 2012). For example, partitioning RS is still challenging because of remarkable soil disturbances (Hanson et al. 2000, Tang et al. 2005. Spatial and temporal variability in RS are often reported due to high variations in forest types, stand ages and management practices (King et al. 2004, Tang & Baldocchi 2005, Saiz et al. 2006, Pang et al. 2013). This has limited our ability to accurately predict the responses of RS and carbon balance to current and future climate change (Ryan & Law 2005). Therefore, measuring RS in different forest types has been proven to be increasingly important to accurately predict global carbon cycles and its responses to climate change .RS is overwhelmingly comprised of rhizoshperic respiration (respiration from roots, mycorrhizae and microbial respiration in the rhizosphere) and heterotrophic respiration , indicating that the Moso bamboo forest studied is a significant carbon sink.

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Section: Experimental Designmentioning

confidence: 99%

Soil respiration and carbon balance in a Moso bamboo (Phyllostachys heterocycla (Carr.) Mitford cv. Pubescens) forest in subtropical China

Tang¹,

Fan²,

Qi³

et al. 2015

iForest

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“…Gu et al (2004) reported that the sand dunes also had high evapotranspiration. Li et al (2010aLi et al ( , 2010b and Li and Wang (2014) measured the evaporation of phreatic water in a sand dune area in the Gobi of Mogao Grottoes using an arched shed air conditioning system, where the buried depth of phreatic water is over 200 m. The results showed that the mean daily phreatic evaporation is 3.6 g/(m 2 d) during five months from June to October. After collecting 9808 g water during 168 days with a greenhouse (2.6 m in radius), the sand moisture content was still obviously higher than the original content.…”

Section: Discussionmentioning

confidence: 95%

“…This result suggests that it is difficult for the rainfall to reach the groundwater even in the depressions beside the lakes let alone on the mega-dunes. Li et al (2010aLi et al ( , 2013 also conducted several simulated rainfall experiments in the Gobi area on the top of the Mogao Grottoes, where the climate and landscape are similar to that in the Alxa Desert. Three grades of precipitation equal to 5, 10 and 15 mm were simulated, and the sprayed water was completely evaporated on the eighth day, 12th day and 16th day, respectively (Li et al, 2010a).…”

Section: Moisture and Stable Isotopes Of Sand Profilesmentioning

confidence: 96%

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New observational and experimental evidence for the recharge mechanism of the lake group in the Alxa Desert, north-central China

Dong

Wang

Chen

et al. 2016

Journal of Arid Environments

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“…Much attention has been devoted to its conservation by the Chinese Government and numerous research institutes throughout the world; its geology, moisture source, climate, and ecology were studied (Guo et al, 2009;Li et al 2010a;Li et al, 2010b;Li et al, 2011). The surrounding environment has been strictly protected, which makes it difficult to find and study the underground characteristics of the sand wedge.…”

Section: Study Areamentioning

confidence: 98%