USING HERBS TO IMPROVE EGG SHELL QUALITY

摘要

The avian eggshell is a complex natural biopolymer of mineralised and non-mineralised matrix. The egg shell constitutes some 9-12% of total egg weight. Good quality egg shells contain approximately 2.2g of calcium in the form of calcium carbonate andabout 95% of the dry egg shell is calcium carbonate. The average eggshell contains 0.3% phosphorus and 0.3% magnesium and traces of sodium, potassium, zinc, manganese, iron and copper. If the calcium from the shell is removed, the organic matrix material is left behind.