naa a22 4500 510737617 CHVBK 20180411083016.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11284-013-1046-9 doi (NATIONALLICENCE)springer-10.1007/s11284-013-1046-9 Stemflow in two xerophytic shrubs and its significance to soil water and nutrient enrichment [Elektronische Daten] [Ya-feng Zhang, Xin-ping Wang, Rui Hu, Yan-xia Pan, Hao Zhang] Shrub canopies are expected to funnel substantial amounts of intercepted rainwater with enriched nutrients as stemflow to shrub base in the desert ecosystems characterized by limited water and nutrients. However, lacking are quantitative studies on the water and nutrient enrichment of stemflow at the shrub basal area. In this study, stemflow were quantified for two xerophytic shrubs (Caragana korshinskii and Artemisia ordosica) in a revegetated desert ecosystem of Shapotou area in northwestern China. We also measured the ion concentrations of total nitrogen (TN), total phosphors (TP), NH4 +-N, NO3 −-N, Na+, K+, Ca2+, Mg2+, Cl−, SO4 2− and the pH and electric conductivity (EC) in stemflow, throughfall and bulk precipitation. Results indicated that stemflow accounted for 8.8 and 2.8% of the gross rainfall for C. korshinskii and A. ordosica, respectively. Individual stemflow linearly increased with increasing rainfall depth. Stemflow increased with rainfall intensity when rainfall intensity was less than 2mmh−1 but showed decreased tendency thereafter. An antecedent precipitation of 1.3 and 1.6mm was necessary for stemflow initiation for C. korshinskii and A. ordosica, respectively. The mean (confidence intervals, α=0.05) funneling ratio was 82 (17) for C. korshinskii and 26 (7) for A. ordosica. Ion concentrations in stemflow were higher than in throughfall, and the concentration of most of the ions measured were significantly higher (p<0.05) in stemflow than in bulk precipitation, with a nutrient enrichment ratio ranged 122.8-1677.0 for C. korshinskii and 12.6-1306.0 for A. ordosica among measured ions, respectively. Overall, the larger funneling ratios and enrichment ratios for the two shrubs suggest that stemflow plays a significant positive role in soil water replenishment and nutrient enrichment at deeper soil profile of root zone in the revegetated ecosystems under arid desert conditions. The Ecological Society of Japan, 2013 Stemflow nationallicence Funneling ratio nationallicence Enrichment ratio nationallicence C. korshinskii nationallicence A. ordosica nationallicence Zhang Ya-feng Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut Wang Xin-ping Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut Hu Rui Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut Pan Yan-xia Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut Zhang Hao Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut Ecological Research Springer Japan 28/4(2013-07-01), 567-579 0912-3814 28:4<567 2013 28 11284 https://doi.org/10.1007/s11284-013-1046-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-013-1046-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Ya-feng Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut NATIONALLICENCE 700 1- Wang Xin-ping Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut NATIONALLICENCE 700 1- Hu Rui Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut NATIONALLICENCE 700 1- Pan Yan-xia Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut NATIONALLICENCE 700 1- Zhang Hao Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/4(2013-07-01), 567-579 0912-3814 28:4<567 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer