1. Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, College of Geographical Sciences, Fujian Normal University , Fuzhou, 350007 , China
2. Lehrstuhl für Grünlandlehre, Technische Universität München , Alte Akademie 12, D-85354 Freising , Germany
3. College of Resources and Environment, Henan Agricultural University , Zhengzhou 450046 , China
4. College of Resources and Environment, Jilin Agricultural University , Changchun 130117 , China
5. Research School of Biology, ANU Joint College of Science, Australian National University , Canberra ACT 0200 , Australia
6. Institut de Recherche en Horticulture et Semences, INRAe, Université d’Angers , 42 rue Georges Morel, 49070 Beaucouzé , France
7. Fujian Provincial Key Laboratory for Plant Eco-physiology , Fuzhou , China