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Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (10): 147-158.DOI: 10.11686/cyxb2020367

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Fermentation quality and in rumen degradability of mixed silage from maize stalk and tomato pomace in varying proportions

Dong-qing FU1(), Chun-ying JIA2(), Xiao-chun LIAN3, Li ZHANG4, Fan-fan ZHANG1(), Chun-hui MA1   

  1. 1.College of Animal Science and Technology,Shihezi University,Shihezi 832000,China
    2.Animal Husbandry and Veterinary Workstation,the Third Division of Xinjiang Production and Construction Corps,Tumxuk 843806,China
    3.Animal Husbandry and Veterinary Workstation,Xinjiang Production and Construction Corps,Urumqi 830063,China
    4.Agriculture Academy of Xinjiang,Shihezi 832000,China
  • Received:2020-07-29 Revised:2020-10-12 Online:2021-09-16 Published:2021-09-16
  • Contact: Chun-ying JIA,Fan-fan ZHANG

Abstract:

The purpose of this study was to provide technical data to inform silage production practice and promote effective utilization of agricultural waste in Southern Xinjiang. The fermentation quality and rumen degradation characteristics of mixed silage of maize stalk and tomato pomace were evaluated by chemical analysis and using rumen fistula sheep animal models. A plastic-wrap method was used for silage fermentation and seven feed treatments were prepared as follows: treatment T1=100% maize stalk; treatment T2 tomato pomace∶maize stalk ratio (TP∶MS)=3∶7; treatment T3 TP∶MS=4∶6; treatment T4 TP∶MS=5∶5, treatment T5 TP∶MS=6∶4; treatment T6 TP∶MS=7∶3; treatment T7=100% tomato pomace. Silage fermentation quality indicators analyzed included dry matter (DM), crude protein (CP), water soluble carbohydrates (WSC), neutral detergent fiber (NDF), acid detergent fiber (ADF), ether extract (EE), crude ash (Ash), pH value, ammonium nitrogen (NH3-N), lactic acid (LA), acetic acid (AA), propionic acid (PA), butyric acid (BA) and NH3-N∶TN. In rumen degradability analyzed included dry matter degradability (DMD), neutral detergent fiber degradability (NDFD), acid detergent fiber degradability (ADFD), organic matter degradability (OMD), effective degradability (ED). and degradation parameters of mixed silage for 90 days. The results showed that the T2 and T3 treatments had the highest DM and LA contents, while the T3 treatment had the highest CP, WSC and EE contents. However, the NH3-N/TN of the T3 treatment was the lowest among the seven treatments. The T3 and T4 treatments had the lowest NDF and ADF contents. The T3, T4 and T5 treatments were highest for Ash content. The T2, T3 and T4 treatments had the lowest pH value. The AA content of the T2 treatment was lower than other treatments. The T1, T2, T3 and T4 treatments had the lowest PA content. The BA and NH3-N contents of the T1, T2 and T3 treatments were lower than for other treatments. The EDNDF of the T4 treatment, the EDADF of the T1 and T7 treatments and the EDOM of the T3 and T7 treatments were higher than other treatments in each case. Other indexes did not differ significantly among treatments (P>0.05). The total fermentation quality and the effective degradability of 15 core indicators were evaluated by a ‘fuzzy similarity priority ratio’ analysis. Overall silage quality and degradability was best for the tomato pomace∶maize stalk silage ratio of 4∶6 (treatment T3, water content about 67.27%).

Key words: Southern Xinjiang, cornstalk, tomato pomace, fermentation quality, ruminal degradability