1. Key Laboratory of the Ministry of Education for Ecological Restoration of Saline Vegetation, College of Life Sciences, Northeast Forestry University, Harbin 150040, China
2. Key Laboratory of Combining Farming and Animal Husbandry, Institute of Animal Husbandry of Heilongjiang Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Harbin 150086, China
3. Graduate School of Science, Nagoya City University, Nagoya 467-8501, Japan