College of Resources and Environment Yunnan Agricultural University Kunming 650201 P.R.China;
College of Horticulture and Landscape Yunnan Agricultural University Kunming 650201 P.R.China;
College of Resources and Environment Yunnan Agricultural University Kunming 650201 P.R.China;
College of Resources and Environment Yunnan Agricultural University Kunming 650201 P.R.China;
College of Resources and Environment Yunnan Agricultural University Kunming 650201 P.R.China;
College of Resources and Environment Yunnan Agricultural University Kunming 650201 P.R.China;
Yunnan Open University Kunming 650223 P.R.China;