Response of soil water dynamics to precipitation years under different vegetation types on the northern Loess Plateau, China
LIU Bingxia1,2, SHAO Ming’an3*
1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; 2 Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China; 3 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China
Response of soil water dynamics to precipitation years under different vegetation types on the northern Loess Plateau, China
LIU Bingxia1,2, SHAO Ming’an3*
1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; 2 Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China; 3 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China
摘要 Implementation of the Grain-for-Green project has led to rapid land cover changes and resulted in a signi?cantly increased vegetation cover on the Loess Plateau of China during the past few decades. The main objective of this study was to examine the responses of soil water dynamics under four typical vegetation types against precipitation years. Soil water contents (SWCs) were measured in 0–4.0 m profiles on a hillslope under the four vegetation types of shrub, pasture, natural fallow and crop in a re-vegetated catchment area from April to October in normal (2010), dry (2011), wet (2014) and extremely wet (2013) years. The results indicated that precipitation and vegetation types jointly controlled the soil water temporal dynamics and profile characteristics in the study region. SWCs in 0–4.0 m profiles of the four vegetation types were ranked from high to low as crop>fallow>pasture>shrub and this pattern displayed a temporal stability over the four years. In the extremely wet year, SWC changes occurred in the 0–2.0 m layer under shrub and pasture while the changes further extended to the depth of 4.0-m deep layers under fallow and crop. In the other three years, SWCs changes mainly occurred in the 0–1.0 m layer and kept relatively stable in the layers deeper than 1.0 m for all the four vegetation types. The interannual variation in soil depth of SWCs was about 0–2.0 m for shrub and pasture, about 0–3.4 m for fallow and about 0–4.0 m for crop, respectively. The dried soil layers formed at the depths of 1.0, 0.6, 1.6 and 0.7 m under shrub, and 1.0, 1.0, 2.0 and 0.9 m under pasture, respectively in 2010, 2011, 2013 and 2014. The infiltrated rainwater mostly stayed in the 0–1.0 m layer and hardly supplied to soil depth >1.0 m in normal, dry and wet years. Even in the extremely wet year of 2013, rainwater recharge depth did not exceed 2.0 m under shrub and pasture. This implied that soil desiccation was difficult to remove in normal, dry and wet years, and soil desiccation could be removed in 1.0–2.0 m soil layers even in the extremely wet year under shrub and pasture. The results indicated that the natural fallow was the best vegetation type for achieving sustainable utilization of soil water and preventing soil desiccation.
Abstract: Implementation of the Grain-for-Green project has led to rapid land cover changes and resulted in a signi?cantly increased vegetation cover on the Loess Plateau of China during the past few decades. The main objective of this study was to examine the responses of soil water dynamics under four typical vegetation types against precipitation years. Soil water contents (SWCs) were measured in 0–4.0 m profiles on a hillslope under the four vegetation types of shrub, pasture, natural fallow and crop in a re-vegetated catchment area from April to October in normal (2010), dry (2011), wet (2014) and extremely wet (2013) years. The results indicated that precipitation and vegetation types jointly controlled the soil water temporal dynamics and profile characteristics in the study region. SWCs in 0–4.0 m profiles of the four vegetation types were ranked from high to low as crop>fallow>pasture>shrub and this pattern displayed a temporal stability over the four years. In the extremely wet year, SWC changes occurred in the 0–2.0 m layer under shrub and pasture while the changes further extended to the depth of 4.0-m deep layers under fallow and crop. In the other three years, SWCs changes mainly occurred in the 0–1.0 m layer and kept relatively stable in the layers deeper than 1.0 m for all the four vegetation types. The interannual variation in soil depth of SWCs was about 0–2.0 m for shrub and pasture, about 0–3.4 m for fallow and about 0–4.0 m for crop, respectively. The dried soil layers formed at the depths of 1.0, 0.6, 1.6 and 0.7 m under shrub, and 1.0, 1.0, 2.0 and 0.9 m under pasture, respectively in 2010, 2011, 2013 and 2014. The infiltrated rainwater mostly stayed in the 0–1.0 m layer and hardly supplied to soil depth >1.0 m in normal, dry and wet years. Even in the extremely wet year of 2013, rainwater recharge depth did not exceed 2.0 m under shrub and pasture. This implied that soil desiccation was difficult to remove in normal, dry and wet years, and soil desiccation could be removed in 1.0–2.0 m soil layers even in the extremely wet year under shrub and pasture. The results indicated that the natural fallow was the best vegetation type for achieving sustainable utilization of soil water and preventing soil desiccation.
The study was financially supported by the National Natural Science Foundation of China (51179180, 41390463).
引用本文:
LIU Bingxia, SHAO Ming’an. Response of soil water dynamics to precipitation years under different vegetation types on the northern Loess Plateau, China[J]. 干旱区科学, 2016, 8(1): 47-59.
LIU Bingxia, SHAO Ming’an. Response of soil water dynamics to precipitation years under different vegetation types on the northern Loess Plateau, China. Journal of Arid Land, 2016, 8(1): 47-59.
Chen H S, Shao M A, Li Y Y. 2008a. Soil desiccation in the Loess Plateau of China. Geoderma, 143(1–2): 91–100. Chen H S, Shao M A, Li Y Y. 2008b. The characteristics of soil water cycle and water balance on steep grassland under natural and simulated rainfall conditions in the Loess Plateau of China. Journal of Hydrology, 360(1–4): 242–251. Chen L D, Huang Z L, Gong J, et al. 2007. The effect of land cover/vegetation on soil water dynamic in the hilly area of the Loess Plateau, China. Catena, 70(2): 200–208. Chen L D, Wang J P, Wei W, et al. 2010. Effects of landscape restoration on soil water storage and water use in the Loess Plateau Region, China. Forest Ecology and Management, 259(7): 1291–1298. D’Odorico P, Caylor K, Okin G S, et al. 2007. On soil moisture–vegetation feedbacks and their possible effects on the dynamics of dryland ecosystems. Journal of Geophysical Research: Biogeosciences (2005–2012), 112(G4): G04010. Farley K A, Jobbágy E G, Jackson R B. 2005. Effects of afforestation on water yield: a global synthesis with implications for policy. Global Change Biology, 11(10): 1565–1576. Fu B J, Wang J, Chen L D, et al. 2003. The effects of land use on soil moisture variation in the Danangou Catchment, the Loess Plateau of China. Catena, 54(1–2): 197–213. Fu X L, Shao M A, Wei X R, et al. 2012. Effects of monovegetation restoration types on soil water distribution and balance on a hillslope in northern Loess Plateau of China. Journal of Hydrologic Engineering, 18(4): 413–421. Gish T J, Prueger J H, Daughtry C S T, et al. 2011. Comparison of field-scale herbicide runoff and volatilization losses: an eight-year field investigation. Journal of Environmental Quality, 40(5): 1432–1442. Huang Y L, Chen L D, Fu B J, et al. 2006. Experimental study on ecological water use in a gully catchment of the Loess Plateau: effects of climate and land-use change. Advances in Water Science, 17(1): 14–19. (in Chinese) Huo Z, Shao M A. 2005. Soil water distribution of the shrub land at the gully bank in the wind-water erosion crisscross region of Loess Plateau in China. Transactions of CSAE, 21(6): 45–49. (in Chinese) Huo Z, Shao M A, Horton R. 2008. Impact of gully on soil moisture of shrubland in wind-water erosion crisscross region of the Loess Plateau. Pedosphere, 18(5): 674–680. Ingmar M, Chen L D, Rudi H. 2003. Soil conditions in a small catchment on the Loess Plateau in China. Catena, 54(1–2): 45–58. Jia Y H, Shao M A. 2014. Dynamics of deep soil moisture in response to vegetational restoration on the Loess Plateau of China. Journal of Hydrology, 519: 523–531. Kerkhoff A J, Martens S N, Shore G A, et al. 2004. Contingent effects of water balance variation on tree cover density in semiarid woodlands. Global Ecology and Biogeography, 13(3): 237–246. Legates D R, Mahmood R, Levia D F, et al. 2011. Soil moisture: a central and unifying theme in physical geography. Progress in Physical Geography, 35(1): 65–86. Li X Y. 2011. Mechanism of coupling, response and adaptation between soil, vegetation and hydrology in arid and semiarid regions. Scientia Sinica Terrae, 41(12): 1721–1730. (in Chinese)Li X Y, Zhang S Y, Peng H Y, et al. 2013. Soil water and temperature dynamics in shrub-encroached grasslands and climatic implications: results from Inner Mongolia steppe ecosystem of north China. Agricultural and Forest Meteorology, 171–172: 20–30.Messing I, Chen L D, Hessel R. 2003. Soil conditions in a small catchment on the Loess Plateau in China. Catena, 54(1–2): 45–58.Mohammad A G, Adam M A. 2010. The impact of vegetative cover type on runoff and soil erosion under different land uses. Catena, 81(2): 97–103. Nosetto M D, Jobbágy E G, Tóth T, et al. 2007. The effects of tree establishment on water and salt dynamics in naturally salt-affected grasslands. Oecologia, 152(4): 695–705. Oudin L, Andréassian V, Lerat J, et al. 2008. Has land cover a significant impact on mean annual streamflow? An inter-national assessment using 1508 catchments. Journal of Hydrology, 357(3–4): 303–316. Porporato A, D’Odorico P, Laio F, et al. 2002. Ecohydrology of water-controlled ecosystems. Advances in Water Re-sources, 25(8–12): 1335–1348. Reszkowska A, Krümmelbein J, Peth S, et al. 2011 Influence of grazing on hydraulic and mechanical properties of semiarid steppe soils under different vegetation type in Inner Mongolia, China. Plant and Soil, 340(1–2): 59–72. Salve R, Sudderth E A, Clair S B S, et al. 2011. Effect of grassland vegetation type on the responses of hydrological processes to seasonal precipitation patterns. Journal of Hydrology, 410(1–2): 51–61. Shangguan Z P. 2007. Soil desiccation occurrence and its impact on forest vegetation in the Loess Plateau of China. International Journal of Sustainable Development and World Ecology, 14(3): 299–306. Sun G, Zhou G Y, Zhang A Q, et al. 2006. Potential water yield reduction due to forestation across China. Journal of Hydrology, 328(3–4): 548–558. Tao L W, Ma H, Ge F L. 2000. Analysis on the characteristics of precipitation in Shannxi Province. Shaanxi Meteorology, (5): 6–9. (in Chinese) Van den Elsen E, Hessel R, Liu B Y, et al. 2003. Discharge and sediment measurements at the outlet of a watershed on the Loess plateau of China. Catena, 54(1–2): 147–160. Wang L, Wang Q J, Wei S P, et al. 2008. Soil desiccation for Loess soils on natural and regrown areas. Forest Ecology and Management, 255(7): 2467–2477. Wang M B, Li H J, Chai B F. 1996. Effect of extreme rainfall on the soil water cycle of forest land. Journal of Soil Erosion and Soil and Water Conservation, 2(3): 83–87, 92. (in Chinese) Wang S, Fu B J, He C S, et al. 2011. A comparative analysis of forest cover and catchment water yield relationships in northern China. Forest Ecology and Management, 262(7): 1189–1198. Wang Y Q, Shao M A, Shao H B. 2010. A preliminary investigation of the dynamic characteristics of dried soil layers on the Loess Plateau of China. Journal of Hydrology, 381(1–2): 9–17. Wang Y Q, Shao M A, Liu Z P, et al. 2012. Regional spatial pattern of deep soil water content and its influencing factors. Hydrological Sciences Journal, 57(2): 265–281. Wang Y Q, Shao M A, Liu Z P. 2013. Vertical distribution and influencing factors of soil water content within 21-m profile on the Chinese Loess Plateau. Geoderma, 193–194: 300–310. Wang Z Q, Liu B Y, Zhang Y. 2009a. Soil moisture of different vegetation types on the Loess Plateau. Journal of Geo-graphical Sciences, 19(6): 707–718. Wang Z Q, Liu B Y, Liu G, et al. 2009b. Soil water depletion depth by planted vegetation on the Loess Plateau. Science in China Series D: Earth Sciences, 52(6): 835–842. Wen Z M, Jiao F, Pu Y J, et al. 2005. Natural restoration of vegetation and dynamic changes of species diversity in gully regions on Loess Plateau-case study in Wuqi County. Research of Soil and Water Conservation, 12(1): 1–3. (in Chinese) Wilson D J, Western A W, Grayson R B. 2004. Identifying and quantifying sources of variability in temporal and spatial soil moisture observations. Water Resources Research, 40(2) W02507, doi: 10.1029/2003WR002306.Xu X X, Zhang B Y, Ju T J. 2005. The spatial-temporal distribution of rainfall, runoff, and soil water in small watershed and its utilization. Ecology and Environment, 14(6): 890–893. (in Chinese) Yang W Z, Yu C Z. 1992. Regional Management and Evaluation of Loess Plateau. Beijing: Science Press, 241–297. (in Chinese)Yao S X, Zhao C C, Zhang T H, et al. 2013. Response of the soil water content of mobile dunes to precipitation patterns in Inner Mongolia, northern China. Journal of Arid Environments, 97: 92–98. Zeng C, Shao M A, Wang Q J, et al. 2011. Effects of land-use on temporal-spatial variability of soil water and soil-water conservation. Acta Agriculturae Scandinavica, Section B–Soil and Plant Science, 61(1): 1–13. Zhang C X, Hao M D, Wei X R, et al. 2004. Soil water distribution characteristics of alfalfa with different planting years in the gully region of loess plateau. Plant Nutrition and Fertilizer Science, 10(6): 604–607. (in Chinese) Zhang W H, Liu G B. 2008. Review and proposals on vegetation restoration in the Loess Plateau, Northwest China. Frontiers of Forestry in China, 3(1): 85–91.
2016, Vol. 8 
