Energy balance analysis of farm production systems in the transitional zone between the Loess Plateau and the Qinghai Tibet Plateau, China——A case study of the Tongwei-Weiyuan-Xiahe transect
CONG Yi-ming, GAO Xiao-ye, HOU Fu-jiang*
不同系统能量收益与能量效率的关系 a:作物系统能量收益与能量效率关系The relationship between energy income and energy efficiency in crop system;b:家畜系统能量收益与能量效率关系The relationship between energy income and energy efficiency in livestock system;c:综合系统能量收益与能量效率关系The relationship between energy income and energy efficiency in integrated system.