Scientia Agricultura Sinica ›› 2013, Vol. 46 ›› Issue (12): 2566-2575.doi: 10.3864/j.issn.0578-1752.2013.12.018

• ANIMAL SCIENCE·VETERINARY SCIENCERE • Previous Articles     Next Articles

Studies on Native Grass Silage of Different Plant Communities in Meadow Steppe

 WANG  Hong-Mei, SUN  Qi-Zhong, HUA  Mei   

  1. 1.Graduate School, Chinese Academy of Agricultural Science, Beijing 100081
    2.Grassland Research Institute, Chinese Academy of Agricultural Science, Huhhot 010010)
  • Received:2012-11-01 Online:2013-06-15 Published:2013-04-27

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Abstract: 【Objective】 The silage quality and feasibility of sixteen plant communities in meadow steppe were studied in this paper. 【Method】 Fresh grass from 16 sites in meadow steppe were loaded after cutting into polyethylene bag to be vacuumed and sealed. After 60 days, the silage fermentation quality(pH value, content of ammonia nitrogen（NH3-N）, lactic acid（LA）, acetic acid（AA）, propionic acid（PA）, butyric acid（BA）and total acid（TA）) and chemical composition(Buffering capacity（BC）, content of dry matter（DM）, crude protein（CP）, water-soluble carbohydrate（WSC）, neutral detergent fiber（NDF）and acid detergent fiber（ADF）) were analyzed. 【Result】 Many of the raw materials were suited to silage, because of their lower buffering capacity and higher content of dry matter and water-soluble carbohydrate. The contents of dry matter, WSC, NDF and ADF in each silage were lower than them in each raw materials, except in sites 5 and 14. But the change of CP content in silage had no trend compared with raw materials. There were significant differences in pH value, NH3-N/TA, contents of four organic acids and total acid and contents of nutrient compositions (DM, CP, WSC, NDF and ADF) among 16 silage materials(P＜0.05). The silage pH value was from 4.56 to 5.69, with lower value of NH3-N/TA.【Conclusion】 The rating of silage fermentation quality could be divided into optimal(1, 8, 9, 13, 14, 15), good(2, 10, 12), medium (5, 16) and bad(3, 4, 6, 7, 11).

Key words: meadow steppe , plant community , native grass , silage , chemical composition , silage quality

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