The dioxin levels in local pastures are also much higher than those found in imported grass varieties , such as alfalfa hay , bermuda grass and oat grass , which contain less than 0 . 3 ng / kg of dioxin , according to the study 根据这份研究，本地牧草的戴奥辛含量也高出进口牧草许多，像是苜蓿、百慕达草、燕麦草等进口牧草的戴奥辛含量多在0 . 3奈克公斤以下。
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