1. Faculty of Modern Agricultural Engineering, Kunming University of Science & Technology, Kunming, Yunnan 650500, China
2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
3. City College, Kunming University of Science & Technology, Kunming, Yunnan 650051, China
4. Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, Yunnan 650500, China