Feeding value of quinoa and its effect on growth performance and economic benefits of growing cattle
The purpose of this paper was to study the feeding value of quinoa and its effect on growth performance and economic benefits of beef cattle.Experiment 1:Quinoa varieties(lines)WQ1409,WQ1545,WQ1664,WQ1708,WQ1721 and WQ1860 were selected as experimental materials.The whole plant of quinoa was collected at the late flowering stage,and its dry matter,crude protein and acid detergent fiber content were measured.The relative feeding value(RFV)and roughage grading index(GI)were used to evaluate the forage quality.The results showed that the dry matter content of six quinoa varieties(lines)ranged from 25.34％～32.75％,the crude protein content ranged from 16.18％～21.67％,the neutral detergent fiber content ranged from 47.23％～50.95％,and the acid detergent fiber content ranged from 34.08％～37.44％.The overall trend of RFV and roughage GI was the same,and the six quinoa varieties(lines)were grade 2 and above.Experiment 2:Twenty 7-month-old cattle and 20 10-month-old cattle with similar body weight were selected and fed with 22 kg quinoa.The test period was 60 days,and other feeding methods remained unchanged.The results showed that the average body height of the growing cattle in the experimental groups 1 and 2 was increased by 1.29 cm and 1.4 cm,respectively,compared with the control groups 1 and 2(P＜0.05).Compared with the control group 1 and 2,the average body weight of the breeding cattle in the experimental group 1 and 2 increased by 8.59 kg and 11.69 kg,respectively(P＜0.05).In summary,the whole plant of quinoa had high feeding value and was suitable as a roughage source for herbivores.Adding quinoa to the diet could effectively improve the growth performance of growing cattle and increase certain economic benefits.
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