【摘要】 作物种植系统是“稻—菜—猪—沼”复合生态系统的主导产业 ,早、晚两季水稻和蔬菜的光能利用率分别为 1.37%、 1.40 %和 1.0 2 %。该复合生态系统可进行良性循环运作 ,其有机能产投比为 2 .12 ,整体能投少 ,能量转换快 ,养分利用率高 ,兼顾经济、社会和生态效益。更多还原

【Abstract】 Cropping plantation system was the leading industry in the comprehensive ecological system of “Rice Vegetable Pigs Biogas”, in which the photosynthetic efficiency of early and later rice and vegetable was 1 37%, 1 40% and 1 02% respectively.The ratio of output to input energy of organic matter was 2 12 in this system, which was little energy investment in overall, fast energy transformation and high rate of nutrient utilization,with economic, social and ecological benefits.更多还原