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cultch n.= culch.

cultigen

Traditionally , oysters are cultured by the bottom culture method with spat collected by laying rock , concrete tile or post as cultch on the mud flat in may or june . the oyster spat takes four to five years to grow to marketable size 傳統上,香港養蠔都是使用海底養殖法,在5月或6月間在泥灘上放置石塊、瓦片或柱桿作為附器收集蠔苗,這些蠔苗要生長4至5年才可收成售賣。