References
Allen, S.T., Kirchner, J.W., Braun, S., Siegwolf, R.T.W., & Goldsmith, G.R. (2019). Seasonal origins of soil water used by trees. Hydrol. Earth Syst. Sci. , 23, 1199-1210.
Arnáez, J., Lana-Renault, N., Lasanta, T., Ruiz-Flano, P., & Castroviejo, J. (2015). Effects of farming terraces on hydrological and geomorphological processes. A review. Catena 128, 122-134.
Barbeta, A., Mejía-Chang, M., Ogaya, R., Voltas, J., Dawson, T.E., & Peñuelas J. (2015). The combined effects of a long-term experimental drought and an extreme drought on the use of plant-water sources in a Mediterranean forest. Glob. Chang. Biol. , 21(3), 1213-1225.
Biswas, A. (2014). Landscape characteristics influence the spatial pattern of soil water storage: Similarity over times and at depths.Catena , 116, 68-77.
Broedel, E., Tomasella, J., Cândido, L.A., & von Randow, C. (2017). Deep soil water dynamics in an undisturbed primary forest in central Amazonia: Differences between normal years and the 2005 drought.Hydrol. Process. , 31, 1749–1759.
Chen, D., Wei, W., & Chen, L.D. (2017). Effects of terracing practices on water erosion control in China: A meta-analysis. Earth Sci. Rev ., 173, 109-121.
Choat, B., Brodribb, T.J., Brodersen, C.R., Duursma, R.A., Lopez, R., & Medlyn, B.E. (2018). Triggers of tree mortality under drought.Nature , 558, 531-539.
Christina, M., Nouvellon, Y., Laclau, J., Stape, J.L., Bouillet, J., Lambais, G.R., & le Maire, G. (2017). Importance of deep water uptake in tropical eucalypt forest. Funct. Ecol ., 31, 509-519.
Gao, X., Wu, P., Zhao, X., Wang, J., & Shi, Y. (2014). Effects of land use on soil moisture variations in a semi-arid catchment: implications for land and agricultural water management. Land Degrad. Dev. , 25, 163-172.
Gao, X.D., Zhao, X.N., Li, H.C., Guo, L., Lv, T., & Wu, P.T. (2018a). Exotic shrub species (Caragana korshinskii) is more resistant to extreme natural drought than native species (Artemisia gmelinii) in a semiarid revegetated ecosystem. Agr. Forest Meteorol ., 263, 207-216.
Gao, X.D., Liu, Z.P., Zhao, X.N., Ling, Q., & Huo, G.P. (2018b). Extreme natural drought enhances interspecific facilitation in semiarid agroforestry systems. Agric. Ecosyst. Environ ., 265, 444-453.
Granier, A. (1987). Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements. Tree Physiol ., 3 (4), 309-320.
Gregory, P. (2006). Plant roots: Growth, activity and interaction with soils (Eds.). Blackwell Publishing, .
Gow, L.J., Barrett, D.J., O’Grady, A.P., Renzullo, L.J., & Phinn, S.R. (2018). Subsurface water-use strategies and physiological responses of subtropical eucalypt woodland vegetation under changing water-availability conditions. Agr. Forest Meteorol ., 248, 348-360.
Grossiord, C., Sevanto, S., Dawson, T.E., Adams, H.D., Collins, A.D., Dickman, L.T., Newman, B.D., Stockton, E.A., & McDowell, N.G. (2017). Warming combined with more extreme precipitation regimes modifies the water sources used by trees. New Phytol ., 213, 584-596.
Huang, J., Yu, H., Dai, A., Wei Y., & Kang, L. (2017). Drylands face potential threat under 2 °C global warming target. Nat. Clim. Chang ., 7, 417-422.
He, J., & Yang, K. (2011). China Meteorological Forcing Dataset. Cold and Arid at , 2011. doi:10.3972/westdc.002.2014.db.
Jia, Y.H., Li, T.C., Shao, M.A., et al. (2019). Disentangling the formation and evolvement mechanism of plants-induced dried soil layers on China’s Loess Plateau. Agr. Forest Meteorol ., 269-270, 57-70.
Li, H.J., Si, B.C., Wu, P.T., & McDonnell, J. (2019). Water mining from deep critical zone by apple trees growing on loess. Hydrol. Process . 33,320-327.
Li, L., Gao, X., Wu, P., Zhao, X., Li, H., Ling, Q., & Sun, W. (2017). Soil water content and root patterns in a rain-fed jujube plantation across stand ages on the Loess Plateau of China. Land Degrad. Dev. , 28, 207-216.
Li, P., Zhu, Q.K., Zhao, L.L., Chang, C., & Zhou, Y. (2011). Soil moisture of fish-scale pit during rainy season in Loess hilly and gully region. T. Chinese Soc. Agr. Eng ., 27 (7), 76-81.
Liu, X.E., Li, X.G., Hai, L., Wang, Y.P., & Li, F.M. (2014). How efficient is film fully-mulched ridge–furrow cropping to conserve rainfall in soil at a rainfed site? Field Crop Res ., 169, 107-115.
Luo, D.D., Wang, C.K., & Jin, Y. (2017). Plant water-regulation strategies: Isohydric versus anisohydric behavior. Chin. J. Plant Ecol ., 41, 1020-1032.
Luo, Z.D., Guan, H.D., Zhang, X.P., Zhang, C.C., Liu, N., & Li, G. (2016). Responses of plant water use to a severe summer drought fortwo subtropical tree species in the central southern China. J. Hydrol. Reg. Stud ., 8, 1-9.
Ma, L.H., Wang, X., Gao, Z.Y., Wang, Y.K., Nie, Z.Y., & Liu, X.L. (2019). Canopy pruning as a strategy for saving water in a dry land jujube plantation in a loess hilly region of China. Agric. Water. Manag ., 216, 436-443.
McDowell, N., Pockman, W.T., Allen, C.D., Breshears, D.D., Cobb, N., Kolb, T., Plaut, J., Sperry, J., West, A., Williams, D.G., & Yepez, E.A. (2008). Mechanisms of plant survival and mortality during drought: why do some plants survive while others succumb to drought? New Phytol ., 178 (4), 719-739.
Schmidt-Walter, P., Richter, F., Herbst, M., Schuldt, B., & Lamersdorf, N.P. (2014). Transpiration and water use strategies of a young and a full-grownshort rotation coppice differing in canopy cover and leaf area. Agr. Forest Meteorol ., 195-196, 165-178.
Schwaerzel, K., Zhang, L.L., Montanarella, L., Wang, Y.H., & Sun, G. (2020). How afforestation affects the water cycle in drylands: A process-based comparative analysis. Glob. Chang. Biol. , 26(2), 944-959.
Singh, B., Eberbach, P.L., Humphreys, E., & Kukal, S.S. (2011). The effect of rice straw mulch on evapotranspiration, transpiration and soil evaporation of irrigated wheat in Punjab, India. Agric. Water Manag. , 98, 1847-1855.
Tang, Y.K., Wu, X., Chen, Y.M.,, Wen, J., Xie, Y.L., & Lu, S.B. (2018). Water use strategies for two dominant tree species in pure andmixed plantations of the semiarid Chinese Loess Plateau. Ecohydrology , 11, e1943.
Takahashi, H. (1997). Hydrotropism: The current state of our knowledge.J. Plant Res. , 110, 163-169.
Thornton, P.K., Ericksen, P.J., Herrero, M., & Challinor, A.J. (2014). Climate variability and vulnerability to climate change: a review.Glob. Chang. Biol. , 20, 3313-3328.
United Nations (UN). Transforming our World: the 2030 Agenda for Sustainable Development Annex A/RES/70/1, https://sustainabledevelopment. un.org/post2015/transformingourworld (UN, 2015).
Vohland, K., & Barry, B. (2009). A review of in situ rainwater harvesting (RWH) practices modifying landscape functions in African drylands. Agric. Ecosyst. Environ ., 131, 119-127.
Wang, J.H. (2016). Effects of climate change on jujube industry and its application on the Loess Plateau. China Meteorological Press, Beijing, China.
Wang, P., Huang, K., & Hu, S. (2020). Distinct fine root responses to precipitation changes in herbaceous and woody plants: a meta-analysis.New Phytol. , 225, 1491-1499.
Wei, W., Chen, D., Wang, L.X., Daryanto, S., Chen, L.D., Yu, Y., Lu, Y.L., Sun, G., & Feng, T.J. (2016). Global synthesis of the classifications, distributions, benefits and issues of terracing.Earth Sci. Rev. , 159, 388-403.
West, A.G., Dawson, T.E., February, E.C., Midgley, G.F., Bond, W.J., & Aston, T.L. (2012). Diverse functional responses to drought in a Mediterranean-type shrubland in South Africa. New Phytol. , 195, 396-407.
Yang, F., Feng, Z., Wang, H., Dai, X., & Fu, X. (2017). Deep soil water extraction helps to drought avoidance but shallow soil water uptake during dry season controls the inter-annual variation in tree growth in four subtropical plantations. Agr. Forest Meteorol. , 234, 106-114.
Zhang, B.Q., AghaKouchak, A., Yang, Y.T., Wei, J.H., & Wang, G.Q. (2019). A water-energy balance approach for multi-category drought assessment across globally diverse hydrological basins. Agr. Forest Meteorol. , 264, 247–265.
Zhang, S.L., Lovdahl, L., Grip, H., Jansson, P., & Tong, Y. (2007). Modelling the effects of mulching and fallow cropping on water balance in the Chinese Loess Plateau. Soil Till. Res ., 93, 283-298.
Zhao, X., Wu, P., Feng, H., Wang, Y., & Shao, H. (2009). Towards development of eco-agriculture of rainwater harvesting for supplemental irrigation in the semi-arid Loess Plateau of China. J. Agron. Crop Sci ., 195, 399–407.
Zhu, X.M., Li, Y.S., Peng, X.L., & Zhang, S.G. (1983). Soils of the loess region in China. Geoderma , 29, 237–255.
Table 1. The basic soil properties of the study site.