Nutritional Components and Biological Yield of Sugarcane at Different Cutting Stages and Evaluation of Feeding Value
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Chinese Journal of Tropical Crops ›› 2023, Vol. 44 ›› Issue (1): 113-121.DOI: 10.3969/j.issn.1000-2561.2023.01.012

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Nutritional Components and Biological Yield of Sugarcane at Different Cutting Stages and Evaluation of Feeding Value

LI Mengzhou1, WANG Zhineng2, LU Xin2, CHEN Haowen1, LI Dengyu1, FAN Yuanhong1,3,*()   

  1. 1. Institute of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming, Yunnan 650201, China
    2. Institute of Sugarcane, Yunnan Academy of Agricultural Sciences, Kaiyuan, Yunnan 661600, China
    3. Yunnan Plateau Institute of Characteristic Agriculture Industry, Kunming, Yunnan 650201, China
  • Received:2022-04-23 Revised:2022-05-20 Online:2023-01-25 Published:2023-02-22
  • Contact: *FAN Yuanhong,E-mail:2247888136@qq.com

Abstract:

With the rapid development of the livestock industry, the demand for forage is increasing, and it is urgent to screen new forage crop varieties. In this study, two national forage sugarcane varieties were used as the control. The biological yield of 15 sugarcane varieties and the routine nutritional components of 10 green fodder were measured and analyzed to explore the principal component variation of sugarcane at different cutting stages, and evaluate the feeding value of sugarcane, so as to provide scientific basis for more than one year of sugarcane harvest and whole plant feeding. Crude protein (CP), acid detergent fiber (ADF), water-soluble carbohydrate (WSC) and crude fat (EE) were selected by factor principal component analysis, which basically contained all the information of the indexes measured. Among the 15 sugarcane varieties,‘Yunzhe 12-201’ had the highest CP content, which was 8.80 %, ‘ROC22’ with the lowest ADF content, 35.25 %. The highest WSC content was from ‘Yunzhe 00-290’, 6.16 %. The highest EE content was from ‘Yunzhe 01-286’, 1.40 %. The CP content of ‘ROC22’ and ‘Yunzhe 12-201’ was higher than that of CK1 and CK2. The ADF content of ‘Q27’,‘ROC22’,‘Yunzhe 01-286’, ‘Yunzhe 06-160’,‘Yunzhe 12-142-1-J’,‘Dianzhe 11-728’ was lower than that of CK1 and CK2. The WSC content of ‘Q27’,‘Yunzhe 00-290’,‘Yunzhe 12-142-1-J’,‘Yunzhe 16-16’,‘Dianzhe 11-726’ and ‘Dianzhe 11-728’ was higher than that of CK1 and CK2. There was no significant difference in EE content between 15 sugarcane varieties and CK1 (P>0.05), except ‘Yunzhe 06-160’. There was no significant difference in EE content between 14 sugarcane varieties and CK2. Except for ‘Dianzhe 11-726’, there was no significant difference in Ca content between 14 varieties and CK1 and CK2. The CP content of all sugarcane varieties in the first cutting period was higher than that in the second cutting period, and the ADF, WSC, EE and Ca content in the first cutting period was higher than that in the second cutting period, with 12, 5, 4 and 14 sugarcane varieties, respectively. The total yield of 15 sugarcane was 71.40-163.95 t/hm2, higher than that of CK1 and CK2. The yield of CP, ADF, WSC and EE per unit area of 15 sugarcane varieties exceeded that of CK1 and CK2, and the Ca yield of 15 sugarcane varieties exceeded that of CK2. Comprehensive evaluation showed that sugarcane could be used as ruminant feed with high nutritional value and economic benefit. In this study, five varieties ‘Q27’,‘ROC22’,‘Yunzhe 01-286’,‘Yunzhe 12-201’,‘Dianzhe 11-728’ were selected as the sources of forage sugarcane, which could not only meet the raw material needs of forage animals, but also form an industrial development model of sugar-animal linkage..

Key words: sugarcane, forage, nutritional components, principal component analysis, comprehensive evaluation

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