naa a22 4500 510737781 CHVBK 20180411083017.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11284-013-1063-8 doi (NATIONALLICENCE)springer-10.1007/s11284-013-1063-8 Environmental factors controlling seed germination and seedling recruitment of Stipa bungeana on the Loess Plateau of northwestern China [Elektronische Daten] [Xiao Hu, Zhi Zhou, Ting Li, Yan Wu, Yan Wang] Germination studies are important for collecting information on field seedling recruitment, plant conservation and restoration. This study investigated the role of light, temperature, nitrogen, water stress and burial depth in controlling germination of Stipa bungeana seeds. S. bungeana seeds are photo-inhibited; light significantly decreased seed germination regardless of temperature and water conditions. Seeds germinated at 10-30°C, and the highest germination was 72% and 88% at 20°C in light and dark, respectively. Thermal model analysis showed that presence of light significantly increased average thermal requirement [θ T (50)] from 105°Cd to 186°Cd at sub-optimal temperature, implying that light delays seed germination. Hydrotime model analysis showed that presence of light caused a shift in the median base water potential [Ψ b(50)] from −0.68 to −0.26MPa, which partly explains why light decreased both percentage and speed of germination, even at optimal conditions. As burial depth increased, seedling emergence initially increased and then decreased; the highest seedling emergence recruitment was 43%, for seeds buried at a depth of 1cm. Field observations showed that seedling emergence occurred primarily from July to September, and scarcely occurred from April to June. These results suggest that the light inhibitory effect is an adaptive mechanism that prevents S. bungeana seeds from germinating on the soil surface. To attain highest seedling establishment, seeds of S. bungeana should be sown at a soil depth of 1cm prior to the rainy season, using seeds stored for 1year. The Ecological Society of Japan, 2013 Burial depth nationallicence Hydrotime nationallicence Light nationallicence Nitrogen nationallicence Temperature nationallicence Thermal time nationallicence Water potential nationallicence Hu Xiao State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut Zhou Zhi State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut Li Ting State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut Wu Yan State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut Wang Yan State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut Ecological Research Springer Japan 28/5(2013-09-01), 801-809 0912-3814 28:5<801 2013 28 11284 https://doi.org/10.1007/s11284-013-1063-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-013-1063-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hu Xiao State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut NATIONALLICENCE 700 1- Zhou Zhi State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut NATIONALLICENCE 700 1- Li Ting State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut NATIONALLICENCE 700 1- Wu Yan State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut NATIONALLICENCE 700 1- Wang Yan State Key Laboratory of Grassland Agro-ecosystems, Lanzhou, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/5(2013-09-01), 801-809 0912-3814 28:5<801 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer