Abstract: The harvest of phytomass and the sustainable utilization of plant resources in upland of Southern China are discussed from the point of view of reducing phytomass harvest caused nutrient losses in ecosystems. Since the method, the time and the frequency of phytomass harvesting and the vegetations used for fuel are quite different in different places, the nutrient loss of various ecosystems are therefore largely different. The results of the research will the helpful for the management and sustainable utilization of renewable resources in upland of Southern China.