求翻译：饲料质量方面，应选择高蛋白，且微量元素、维生素搭配合理的饲料，这是根据不同产蛋期的母鸡而定的，不同阶段，饲料所含浓度要求也不一样是什么意思？

Feed quality, high protein, and trace elements, the vitamin with reasonable feed, which is based on different hen laying period may be contained in the different stages, feed concentration requirements are not the same

Feed quality should be selected, high-protein, trace minerals, vitamins and with reasonable fodder, which is based on the different egg hen, different stages, feed the concentration requirements are also not the same as

The feed quality aspect, should choose the high protein, also trace element, Vitamin matching reasonable feed, the different stage which this is according to produces differently the hen which egg time decides, the feed contains the density request not to be dissimilar

Feed quality, you should choose high protein, trace elements, vitamins and mix sound feed, which is defined according to different egg-laying hens, at different stages of concentration requirements contained in the feed is not the same

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