Robbins K R
Poult Sci. 1981 Jan;60(1):254-5. doi: 10.3382/ps.0600254.
In a 16-day experiment involving 270 32-week-old laying hens, dehydrated turf grass (DTG) and corn gluten meal (CGM) were compared as xanthophyll sources for egg yolk pigmentation. Experimental diets were formulated to contain, 0, 5, 10, 15 and 20 mg total xanthophyll/kg diet, provided as either DTG or CGM. Neither egg production nor feed consumption was affected by diet. Egg yolk color dominant wavelength increased slightly with increasing dietary xanthophyll and did not differ with source. Egg yolk color excitation purity increased quadratically (P less than .001) with dietary xanthophyll. The response was similar for both DTG and CGM. It was concluded that the xanthophyll in DTG is 100% bioavailable relative to CGM.
在一项为期16天的实验中，选用270只32周龄的蛋鸡，比较了脱水草坪草（DTG）和玉米蛋白粉（CGM）作为蛋黄色素沉着叶黄素来源的效果。实验日粮的配方含有0、5、10、15和20毫克总叶黄素/千克日粮，分别由DTG或CGM提供。产蛋量和采食量均不受日粮影响。蛋黄颜色的主波长随日粮中叶黄素含量的增加而略有增加，且不受来源的影响。蛋黄颜色的激发纯度随日粮中叶黄素含量呈二次方增加（P<0.001）。DTG和CGM的反应相似。得出的结论是，相对于CGM，DTG中的叶黄素生物利用率为100%。
