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棉花的根、茎、叶花蕾、铃及棉籽仁的断面上有许多黑色的圆点,俗称油腺.油腺里面有多种萜类化合物,叫做棉毒素.通常以棉籽中游离棉酚含量的百分比来表示棉毒素.食用脱毒不好的黑棉籽或毛棉籽油,能破坏人的胃粘膜,危害神经、心血管和生殖系统.国际规定游离棉酚含量高于0.04～0.06%(国家标准0.02～0.04%)的棉花品种都叫有毒棉花.目前生产上种植的棉花品种棉籽中游离酚含量为1.6～2.8%,所以都是有毒棉花.
Cotton roots, stems, leaf buds, bolls and cottonseed section has many black dots, commonly known as oil glands. There are a variety of oil glands Terpenoids, called cotton toxins usually cottonseed free gossypol content Percentage to express cotton toxins. Poor consumption of black cottonseed or cottonseed oil detoxification, can damage the human gastric mucosa, endanger the nerves, cardiovascular and reproductive system .International regulations free gossypol content of more than 0.04 ~ 0.06% (national standards 0.02 ~ 0.04%) of the cotton varieties are called toxic cotton.Cotton varieties currently grown in the production of cottonseed free phenol content of 1.6 to 2.8%, so are toxic cotton.