7Abe A. Horii S, Kameoka. Application of enzymatic analysis with glucoamylase, pronase and cellulase to Various feeds for cattle [J].J Anita Sci, 1979, 48: 1483-1490.
10Zhang H J,Gan Y T,Huang G B,et al.Postharvest residual soil nutrients and yield of spring wheat under water deficit in arid northwest China[J].Agricultural Water Management,2009,96(6):1045-1051.