Analysis of Nutritional Value and Heavy Metal Element Contents in Idesia polycarpa Meal

YANG Jing; ZHANG Juan; LI Lang; LIU Guangmang; WANG Jianping; LIN Yan; BAI Shiping; WU Caimei

doi:10.3969/j.issn.1006-267x.2020.11.055

Chinese Journal of Animal Nutrition >

2020 , Vol. 32 >Issue 11: 5482 - 5490

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.11.055

Analysis of Nutritional Value and Heavy Metal Element Contents in Idesia polycarpa Meal

YANG Jing ,
ZHANG Juan ,
LI Lang ,
LIU Guangmang ,
WANG Jianping ,
LIN Yan ,
BAI Shiping ,
WU Caimei

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1. College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China;
2. Key Laboratory for Animal Disease-Resistance Nutrition and Feedstuffs of China Ministry of Agriculture and Sichuan Province, Institute of Animal Nutrition of Sichuan Agricultural University, Chengdu 611130, China

Received date: 2020-04-18

Online published: 2020-11-16

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Abstract

This experiment was conducted to compare the nutritional value of Idesia polycarpa meal with alfalfa meal and sorghum grain, to analysis the overview nutrient, trace element, amino acid and fatty acid contents and energy value of Idesia polycarpa meal from Sichuan province and evaluate its nutritional value, and to provide scientific basis for the development of Idesia polycarpa meal as feed resources. The overview nutrient, trace element, amino acid and fatty acid contents and energy value were analyzed by routine analysis method, atomic absorption spectrometry method, automatic amino acid analyzer, gas chromatography method and oxygen bomb automatic calorimeter. The results showed as follows: 1) the contents of crude protein, ether extract, crudash, crude fiber, neutral detergent fiber, acid detergent fiber, acid detergent lignin, hemicellulose, cellulose and nitrogen free extract of Idesia polycarpa meal were 19.92%, 15.46%, 8.01%, 27.16%, 30.20%, 24.83%, 13.23%, 5.37%, 10.84% and 29.21%, respectively. 2) The Idesia polycarpa meal was abundant in essential trace elements, which the contents of iron, copper, manganese and zinc were 503.24, 10.52, 78.32 and 41.90 mg/kg, respectively; the contents of heavy metal element cadmium and chromium were 0.94 and 1.35 mg/kg, respectively, which conformed to the Feed Hygiene Standard (GB 13078—2017). 3) There are various kinds of amino acid in Idesia polycarpa meal, the essential amino acid/total amino acid (EAA/TAA) and essential amino acid/nonessential amino acid (EAA/NEAA) were 38% and 61%, respectively, the results were in line with the provisions of Food and Agriculture Organization of the United Nations/World Health Organization (FAO/WHO), and the amino acid composition was balance. 4) The Idesia polycarpa meal was rich in linoleic acid (61.62%), oleic acid (7.11%), palmitic acid (20.60%), palmitoleic acid (6.20%) and stearic acid (1.51%), the unsaturated fatty acid content (76.53%) was high, and the saturated fatty acid content (23.45%) was low. 5) The gross energy, digestive energy, metabolic energy, maintenance net energy, milk production net energy, weight gain net energy were 20.41, 10.41, 8.54, 7.05, 5.81 and 4.23 MJ/kg, respectively. In conclusion, the Idesia polycarpa meal has high crude protein, crude fat, neutral detergent fiber, acid detergent fiber contents and energy value, has high mineral element contents and low heavy metal element contents, the amino acid composition is balance, has high unsaturated fatty acid contents and low saturated fatty acid contents, which has potential value for feed resource development. However, its acid detergent lignin content is high, as a feed resource, it should be paid attention to the dosage or necessary measures to reduce the acid detergent lignin content.

Key words： Idesia polycarpa meal; nutritional value; heavy metal element

Cite this article

YANG Jing , ZHANG Juan , LI Lang , LIU Guangmang , WANG Jianping , LIN Yan , BAI Shiping , WU Caimei . Analysis of Nutritional Value and Heavy Metal Element Contents in Idesia polycarpa Meal[J]. Chinese Journal of Animal Nutrition, 2020 , 32(11) : 5482 -5490 . DOI: 10.3969/j.issn.1006-267x.2020.11.055

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