| Summary: | 碩士 === 國立臺灣大學 === 動物科學技術學研究所 === 100 === Most feed ingredients are imported nowadays in Taiwan. Due to climate change, and energy crisis, the feed cost in animal husbandry is getting higher during the past years. In order to cut down the cost, to use domestic forages, crop residues, agro-industrial byproducts or non-conventional feed resources is an important issue. A total of 8 Alpine goats in mid-lactation were used in a cross-over design experiment. According to their milk yield, lactating goats were evenly assigned into two groups which were assigned as control diet group ( CD ) fed imported feed ingredients or domestic diet group ( DD ) fed completely domestic feed ingredients. The major constituents of CD were alfalfa hay, bermudagrass hay, corn, soybean meal, and alfalfa pellet; the major feed ingredients of DD were corn silage, peanut stover, soybean pulp, and brewers’ grains. Each experiment period included 14 days adaptation period followed by 4 days of sampling period. The results showed there’s no significant difference of dry matter intake between two groups ( CD: 1522 g/head/d; DD: 1449 g/head/d ), but the CD had higher intake and apparent digestibility of crude protein and non-fiber carbohydrates. The intake and digestibility of crude protein of CD were 318 g/head/d, and 84.5％; the DD were 230 g/head/d, and 74％. The intake and digestibility of non-fiber carbohydrate of CD and DD were 662 g/head/d, 90.0％; and 568 g/head/d, 85.9％. Although the DD had lower milk yield ( CD: 2079 g/head/d; DD: 1865 g/head/d ), and N retention ( CD: 19.4 g/head/d; DD: 2.3 g/head/d ) than the CD, the feed efficiency of them were not significantly different. The feed costs of CD and DD were NT$ 14.5 and 11.9 dollars/head/d, respectively. Based on feed intake and milk yield, the estimated profit were NT$ 54.3 and 51.2 dollars/head/d. The DD had lower cost but lower profit. Based on the above results, it still needs to improve the efficiency of DD. Crude protein and non-fiber carbohydrate intakes and digestibilities of DD deserve further improvement if higher milk yield and higher profit were demanded.
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