›› 2018, Vol. 45 ›› Issue (11): 3043-3050.doi: 10.16431/j.cnki.1671-7236.2018.11.009

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Comparative Analysis of Silage Quality and Nutritive Value of Whole-plant Corn Silage with Different Varieties

LIU Yue1, ZHOU Zhenming1, WANG Guogen1, WU Hao1, MENG Qingxiang1, YANG Junxiang2, LUO Feng3, SUN Shoujun3   

  1. 1. State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
    2. Department of System Construction and Extension, National Animal Husbandry Station, Ministry of Agriculture, Beijing 100125, China;
    3. College of Agriculture and Resources and Environment, Tianjin 300384, China
  • Received:2018-04-12 Online:2018-11-20 Published:2018-11-20

Abstract:

This experiment was conducted to investigate the silage quality and nutritive value of whole-plant corn silage of different varieties.Five different varieties of corn were harvested at 1/2 to 3/4 milk line and silaged in plastic bags (50 cm×80 cm) for 60 d (15 to 20℃),then sensory evaluation and fermentation status were analyzed.Chemical and digestion analysis were carried out after the samples were air-dried.The results showed that the overall sensory scores for whole-plant corn silage were good except for Jiyuan 128 which was fair.Lactic acid concentration of Wofeng 9 (6.05%DM) was significantly higher than Jiyuan 128(5.13%DM) and Zhengdan 958 (5.13%DM)(P<0.05),while acetic acid and propionic acid concentrations were extremely significantly lower than Luyu 36,Zhengdan 958 and Jingke 25 (P<0.01).The V-scores were all above 97.00 of whole-plant corn silage.The contents of CP of Jingke 25,EE of Wofeng 9,WSC of Zhengdan 958 and starch of Jiyuan 128 was the highest among the five varieties of corn silage,which were 9.24%DM,3.11%DM,2.84%DM and 30.33%DM,respectively.The RFV of different varieties corn silage from high to low were:Wofeng 9(163.00) > Jiyuan 128(160.93) > Zhengdan 958 (156.30) > Jingke 25(152.70) > Luyu 36(151.77).The 24 h NDFD of Zhengdan 958 and Wofeng 9 (17.84%DM;18.28%DM) were extremely significantly lower than that of Jingke 25 and Jiyuan 128 (24.87%DM;22.97%DM) (P<0.01).In conclusion,the RFV of Wofeng 9 was the highest and its sensory evaluation,lactic acid concentration,V-score,EE and WSC contents were higher,while NH3-N/TN,NDF and ADF contents were lower,therefore,Wofeng 9 performed better than others under this experimental condition.The second was Jiyuan 128 whose RFV and 48 h NDFD were higher,while ADF and ADL contents were the lowest.

Key words: corn variety; whole-plant corn silage; silage quality; nutritive value

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