New Forage Grading Index：Its Establishment and Comparative Study on the Evaluation of Forage Quality with the Grading Index-2001（GI2001） and Relative Feed Value（RFV）

New Forage Grading Index：Its Establishment and Comparative Study on the Evaluation of Forage Quality with the Grading Index-2001（GI2001） and Relative Feed Value（RFV） Animal Husbandry and Feed Science . 2011, (9): 143 -143 . DOI: 10.12160/j.issn.1672-5190.2011.09.051