【摘要】 采用舍饲全收粪法收集分析样品，自动绝热测热仪测定热能，研究了绵羊对高山草原生态系统禾本科一莎草科型草地混合牧草的能量消化率和可消化能。结果表明，随牧草生育期的变化，混合牧草的能量消化率降低，其能量消化率依次为６３．３７％、５５．９２％、５３．６２％和５０．７６％，可消化能减少，依次为１１．７５、１０．０７、９．６７５和９．０８０ＭＪ／ｋｇ。更多还原

【Abstract】 The effect of sheep grazing on the energy digestibility and digestible energy of aborigu1al forage plants grown in the mixture community of grass-sedge in alpine rangeland ecosystem was studied by using the all-feces collecting method under the shed feeding condition,The trial was conducted from July 1 to October15,1990.Samples were taken at random once a month.The energy digestibilities of the fOur respective sam-ples were estimated at 63. 37%,55.92%,53.62%and 50.76%,and the digestible energy records of thefour samples forementioned were collectecd respectively as follows:ll.75,10.07,9.68 and 9.08 MJ/kg.The experimental results showed that the energy digesti bility a nd digestible ene rgy were decreasing with thechanging situation at growth a nd development stages in the alpine rangeland ecosystem.更多还原