old crude
3.During the period of 11-59 hours old, 77. 07% of dry material, 80. 54% of energy, 76.86% of crude protein and 76. 07% of crude fat were utilized, and the contents of utilization of Met (methionine) and Lys (lysine) were 82. 04% and 73. 89% respectively. At 155 hours old, nutrition of yolk sac was almost consumed.
7.The dynamics of nutrients of dominant species of forage such as old world bluestem(Bothriochloa ischaemum),dahurian bushclover(Lespedeza davurica),rush lespedeza(Lespedeza inschanica),Russian wormwood(Artemisia vestita),cepitose cleistogenes(Cleistogenes caespitosa) were studied,results showed that the contents of crude protein,ash declined gradually,with the passing of growth stage,but contrary result appeared with acid detergent fiber and neutral detergent fiber.

