在单一农田生态系统的基础上建立生态农场,获得了鱼、猪、蚕和粮

在单一农田生态系统的基础上建立生态农场,获得了鱼、猪、蚕和粮食的全面丰收。下图是该生态农场的物质循环利用示意图,相关叙述错误的是

 

A.该生态系统的自我调节能力比单一农田生态系统强

  B.蚕粪便喂鱼、鱼粉喂猪均实现了能量的多级利用

  C.粪便、塘泥做肥料又归田,实现了物质循环再生

  D丰收的主要原因是各营养级间的能量传递效率高

答案

D

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