›› 2014, Vol. 41 ›› Issue (9): 74-80.

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Comparative Study and Analysis on Nutrients of Cassava Products

TANG De-fu1, Iji P2, Choct M2, RU Ying-jun1, SONG Shu-yu2, Clarke K L2   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. School of Environmental and Rural Science, University of New England, Armidale 2352, Australia
  • Revised:2014-07-08 Online:2014-09-20 Published:2014-09-24

Abstract: The nutritional ingredients,including crude protein (CP),ether extract (EE),crude fiber (CF),crude ash,nitrogen free extract (NFE),total starch,amylopectine,amylase,amino acid (AA),non-starch polosaccharides (NSP) and minerals content of three kinds of cassava products (CPS) and corn control,and in vitro dry matter (DM) and starch digestibility,and starch profiles were studied.The results showed that CP and AA of the CPS were lower than that of corn,and the quality of its CP was poor.Cassava pellets (CE) had higher EE,crude ash and CF (P<0.05).Cassava residue (CR) was lower at NFE than that of cassava chips (CC) (P<0.05),but the CF and crude ash of it were higher than those of CC and corn (P<0.05).The total starch content was similar among CC,CE and corn,and the amylose/amylopectin of CPS was lower than that of corn (P<0.05).The resistant starch of CR was higher than that of others (P<0.05).The starch granule shape of corn was irregular polyhedron and cassava starch granule shape was a ball.The Ca, K, Fe and Mn of CPS was higher than those of corn,and reverse case for the P and Zn (P<0.05).Corn was lower at SNSP than that of CPS,and SNSP of CR was higher than that of CC and CE (P<0.05).Insoluble NSP of CR was higher than that of CC and CE(P<0.05),and insoluble galactose was higher than that of others (P<0.05).DM and starch digestibility of CE was higher than that of others (P<0.05),and DM and starch digestibility of CR was lower than that of CC and corn (P<0.05).The evaluation results have certain guiding significance for the future application of cassava products in feed industry.

Key words: cassava; corn; nutrients; comparative study

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