Guiding role of the theory of four production levels of pastoral agriculture ecological system on sustainable development in Subei County

The grassland pastoral ecosystem is characterized by four production levels, i.e., preplant production level, plant production level, animal production level and ultrabiological production level. The productivity of the system could be enhanced through closer coupling between different levels. The theory plays an important guide role to sustainable development of pastoral area. Properly dealing with the relationships among the four production levels could promote the social transformation of animal husbandry in pastoral areas (from traditional extensive livestock production to modern intensive livestock production). The theory is also important for the ecological civilization of rangeland, harmonious development between human and nature and the sustainable development of economy and society.