They produce the latter by suspending their rabbit cages above mounds of earthworm-rich soil. When the rabbits 'feces falls to the ground, it becomes a feast for the worms. "Worm castings are nine times more potent than ordinary organic fertilizer," says Li Ming-wei.
錫安山的有機肥，除了以廚餘發酵做成肥水噴灑外，還有特製的「蚯蚓肥」──他們把兔寮懸空建在養殖蚯蚓的土堆樓上，兔子的排泄物直落而下，成為蚯蚓的「美食」。