Feeding Value Assessment of Five Varieties Whole-Plant Cassava in Tropical China

文献类型： 外文期刊

第一作者： Li, Mao

作者： Li, Mao;Zi, Xuejuan;Chen, Songbi;Li, Mao;Zhou, Hanlin;Lv, Renlong;Tang, Jun;Ou, Wenjun;Chen, Songbi;Li, Mao;Zhou, Hanlin;Lv, Renlong;Tang, Jun

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关键词： whole-plant cassava; amino acids; hydrogen cyanide acid; mineral; ruminal degradability

期刊名称：FERMENTATION-BASEL （ 影响因子：3.7； 五年影响因子：4.5 ）

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年卷期： 2024 年 10 卷 1 期

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收录情况： SCI

摘要： The feeding value of five varieties of whole-plant cassava (SC5, SC7, SC9, SC14, and SC205) was assessed through analysis of the nutritional composition and in situ ruminal degradability. The results showed abundant nutrients in whole-plant cassava, and the means of starch and crude protein (CP) were 267.7 and 176.8 (g kg(-1)), and ranged from 223.7 g kg(-1) (SC9) to 296.4 g kg(-1) (SC14) and from 142.4 g kg(-1) (SC5) to 195.8 g kg(-1) (SC9) (p < 0.05), respectively. Meanwhile, the moderate neutral detergent fiber (NDF) of whole-plant cassava was also observed and ranged from 266.2 g kg(-1) in SC9 to 286.6 g kg(-1) in SC14 (p < 0.05). In addition, the trace elements, such as Fe, Mn, Cu, and Zn, in whole-plant cassava were relatively enriched, and their mean concentrations were 135.8, 1225.2, 5.8, and 105.3 mg kg(-1) (p < 0.05), respectively. Both the highest essential amino acid and total amino acid concentrations were obtained in SC7 (p < 0.01). The hydrogen cyanide (HCN) content of fresh and dried whole-plant cassava ranged from 76.5 to 131.6 and from 36.0 to 56.7 mg kg(-1) (p < 0.05), respectively. The in situ dry matter ruminal degradability and metabolizable energy (ME) varied significantly (p < 0.05) and were consistently lowest and highest in SC9 and SC14, ranging from 50.9% to 80.0% and from 7.5 to 12.3 MJ kg(-1), respectively. Collectively, all varieties of whole-plant cassava had a high feeding value, as reflected by abundant starch, minerals, amino acid, and water-soluble carbohydrates, while having a low fiber content and HCN toxicity, as well as excellent ruminal digestibility characteristics, and they could be used as a potential feed resource for ruminants.

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