Contents and accumulation of digested nutrition, total energy, digested energy, metabolize energy in different silage maize increased with harvest time postponing.

不同青贮玉米品种的可消化养分、总能、消化能及代谢能含量与积累量，随收获期推后呈递增趋势。

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That is likely because the herbivorous lifestyle allows a larger size limit, so that the larger they get, the more energy they can get from digested food.

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"By the time the food has been digested by the animal, a lot of the energy in it has been used up or burped out, " he said.

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