Nutritional Values Evaluation of Silkworm Excrement Feed on Geese

LI Yanpin; WANG Zhiyue; YANG Haiming; ZHANG Decai; ZHANG Fenfen

doi:10.3969/j.issn.1006-267x.2015.12.024

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 12: 3840 - 3845

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.12.024

FEED RESOURCES DEVELOPMENT

Nutritional Values Evaluation of Silkworm Excrement Feed on Geese

LI Yanpin ,
WANG Zhiyue ,
YANG Haiming ,
ZHANG Decai ,
ZHANG Fenfen

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College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China

Received date: 2015-06-01

Online published: 2015-12-14

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Abstract

This experiment was conducted to evaluate the nutritional values of silkworm excrement and determine metabolizable energy(ME) and major nutrient utilization of silkworm excrement for geese. Eighteen 60-week-old healthy male Yangzhou geese with similar body weight were randomly divided into 3 groups(group Ⅰ, group Ⅱ, group Ⅲ) with 6 replicates per group and 1 goose per replicate. The method of forced-feeding was used in this metabolism experiment. 100 g basal diet was forced fed in group Ⅰ, and 100 g diet which was form by substituting 20%, 40% of the basal diet with silkworm excrement were forced fed in group Ⅱ and group Ⅲ, respectively. Method of quadric equations was used to obtain the utilization of nutrient of silkworm excrement. The results showed as follows:1) gross energy(GE) and the contents of crude protein(CP), ether extract(EE), crude fiber(CF), neutral detergent fiber(NDF), acid detergent fiber(ADF), total phosphorus(TP), calcium(Ca) of silkworm excrement were 16.01 MJ/kg, 17.64%, 5.24%, 17.85%, 28.34%, 19.76%, 0.15% and 3.00%, respectively. The content of total amino acid(AA) of silkworm excrement was up to 9.06%, the contents of majority AA were more than 0.50%, the contents of aspartate(Asp), glutamic(Glu), glycine(Gly), leucine(Leu) and alanine(Ala) were 0.74%, 1.41%, 0.75%, 0.77% and 0.61%, respectively. 2) The apparent metabolizable energy(AME) and true metabolizable energy(TME) of silkworm excrement were 6.19 and 7.07 MJ/kg, respectively. The utilizations of CP, CF, ADF, NDF, TP and Ca of silkworm excrement were 53.79%, 9.55%, 23.75%, 34.03%, 14.16% and 25.97%, respectively. Utilization of AA of silkworm excrement was relatively lower, utilizations of arginine(Arg), Glu, tyrosine(Tyr), cysteine(Cys) and Leu were 71.45%, 65.10%, 61.50%, 59.96% and 58.13%, respectively. It is concluded that contents of CP, EE, AA of silkworm excrement are higher, contents of Ca, TP are rich. Metabolizable energy is fairly with other conventional feed ingredients, but utilizations of CP, EE, Ca, P and AA are lower.

Key words： silkworm excrement; geese; utilization; metabolizable energy; nutritional values

Cite this article

LI Yanpin , WANG Zhiyue , YANG Haiming , ZHANG Decai , ZHANG Fenfen . Nutritional Values Evaluation of Silkworm Excrement Feed on Geese[J]. Chinese Journal of Animal Nutrition, 2015 , 27(12) : 3840 -3845 . DOI: 10.3969/j.issn.1006-267x.2015.12.024

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