RUMINANT AND HERBIVORE NUTRITION AND FEED

Effects of Silage Mulberry Leaves Instead of Silage Corn on Performance, Milk Quality, Nutrient Apparent Digestibilities, Rumen Fermentation Parameters and Serum Biochemical Indexes of Dairy Goats

  • LING Hao ,
  • GUO Shuiqiang ,
  • LI Xinyao ,
  • QU jintao ,
  • LI Feiming ,
  • ZHANG Peihua
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  • 1. College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China;
    2. Chengbu Shanmu Animal Husbandry Co., Ltd., Shaoyang 422500, China;
    3. Hunan Sangyejia Agricultural Technology Co., Ltd., Ningxiang 610604, China

Received date: 2020-12-01

  Online published: 2021-06-10

Abstract

The purpose of this experiment was to study the effects of silage mulberry leaves instead of silage corn on performance, milk quality, nutrient apparent digestibilities, rumen fermentation parameters and serum biochemical indexes of dairy goats. Thirty Xinong Saanen dairy goats with similar parity, lambing date, milk yield and body weight were randomly divided into 2 groups with 15 goats per group. Goats in the corn group were fed a silage corn total mixed ration, in which the contents of acid detergent fiber, neutral detergent fiber, crude protein and digestible energy were 26.97%, 47.05%, 17.54% and 5.56 MJ/kg; goats in the mulberry leaf group were fed a silage mulberry leaf total mixed ration, in which the contents of acid detergent fiber, neutral detergent fiber, crude protein and digestible energy were 25.62%, 46.85%, 17.88% and 5.67 MJ/kg. The pre-experimental period lasted for 10 days, and the experimental period lasted for 42 days. The results showed as follows:1) the dry matter intake of mulberry leaf group was significantly higher than that of corn group (P<0.01), and the milk yield was significantly higher than that of corn group (P<0.05). There was no significant difference in feed conversion rate between the two groups (P>0.05). 2) The milk protein percentage of mulberry leaf group was significantly higher than that of corn group (P<0.01), and the solids-not-fat content was significantly higher than that of corn group (P<0.05). There were no significant differences in somatic cell count, milk fat percentage, lactose percentage and milk urea nitrogen content between the two groups (P>0.05). 3) The crude protein apparent digestibility of mulberry leaf group was significantly higher than that of corn group (P<0.01), and the acid detergent fiber apparent digestibility was significantly higher than that of corn group (P<0.05). There were no significant differences in apparent digestibilities of dry matter, neutral detergent fiber and crude fat between the two groups (P>0.05). 4) The rumen fluid pH of mulberry leaf group was significantly lower than that of corn group (P<0.01), the concentrations of acetic acid, propionic acid, butyric acid and total volatile fatty acids in rumen fluid were significantly higher than those of corn group (P<0.01), and the concentration of isovaleric acid in rumen fluid was significantly higher than that of corn group (P<0.05). There were no significant differences in the concentrations of ammonium nitrogen, isobutyric acid and valeric acid between the two groups (P>0.05). 5) The serum high density lipoprotein content of mulberry leaf group was significantly higher than that of corn group (P<0.01), and the serum urea nitrogen content was significantly lower than that of corn group (P<0.01). There were no significant differences in the contents of total protein, albumin, total cholesterol, triglyceride, low density lipoprotein, glucose and the activities of glutamic oxaloacetic transaminase and alkaline phosphatase in serum between the two groups (P>0.05). To sum up, under the conditions of this experiment, silage mulberry leaves in the same proportion instead of silage corn can promote rumen fermentation of dairy goats, increase nutrient apparent digestibilities, increase milk yield and improve milk quality.

Cite this article

LING Hao , GUO Shuiqiang , LI Xinyao , QU jintao , LI Feiming , ZHANG Peihua . Effects of Silage Mulberry Leaves Instead of Silage Corn on Performance, Milk Quality, Nutrient Apparent Digestibilities, Rumen Fermentation Parameters and Serum Biochemical Indexes of Dairy Goats[J]. Chinese Journal of Animal Nutrition, 2021 , 33(6) : 3389 -3399 . DOI: 10.3969/j.issn.1006-267x.2021.06.040

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