Abstract
Simple SummaryGeese are usually raised in the main rice-growing areas in China. Broken rice (BR) produced from rice processed into refined rice in these places can be applied to goose feed, which not only reduces the dependence on corn but can also reduce the transportation cost of feed raw materials by using local sources. It was found that BR had no negative effects on the growth performance of growing geese.This study investigated the effect of replacing dietary corn with broken rice (BR) on goose growth performance, body size and bare skin color. In total, 240 28-day-old healthy male Yangzhou goslings with similar body weight (BW) were randomly divided into five groups, with six replicates per group and eight geese per replicate. The control group was fed with a corn-soybean meal. The BR25, BR50, BR75 and BR100 groups had 25%, 50%, 75% and 100% of corn replaced with BR, respectively (corresponding to 15.95%, 31.88%, 47.63% and 62.92% of BR in the feed, respectively), each with constant metabolizable energy (ME) to crude protein (CP) ratio (ME/CP). At 28, 42, 56 and 70 d, BW and feed intake for each pen were measured. Blood was collected, and body size and bare skin color were evaluated at 70 d. The results showed that different BR replacement proportions had no effect on BW at 42, 56 or 70 d or on average daily feed intake (ADFI) or average daily gain (ADG) from 28 to 42 d (p > 0.05) but BR50 and BR75 decreased the feed/gain ratio (F/G) from 28 to 42 d (p < 0.05). From 42 to 56 d, BR75 and BR100 geese had a lower ADFI than the control geese (p < 0.05), and BR75 and BR100 geese had a lower F/G than the BR25 geese (p < 0.05). Group BR50, BR75 and BR100 geese had a lower ADFI from 56 to 70 d than the control geese (p < 0.05). From 28 to 70 d, BR50, BR75 and BR100 groups had a lower ADFI (p < 0.05). Interestingly, the control and BR25 groups had a higher flipper score than the BR50, BR75 and BR100 groups (p < 0.05), and the control group had a higher flipper score than the BR25 group (p < 0.05). All BR groups reduced the bill scoring (p < 0.05). Different BR replacement proportions did not negatively affect serum biochemical variable at 70 d (p > 0.05). Overall, under these conditions, BR can totally replace corn in goose diets, and we recommend 75% replacement of corn with BR from 28 to 70 d.
Highlights
Corn is one of the main energy sources in poultry diets, providing 50–70% of the total energy of poultry
Control group was fed with a corn-soybean meal basal diet; The BR25, BR50, BR75 and BR100 indicate that 25%, 50%, 75% and 100% of corn was replaced by broken rice in the basal diet, respectively (15.95%, 31.88%, 47.63% and 62.92% of BR, respectively, was added to the diets)
2 Control group was fed with a corn-soybean meal basal diet; BR25, BR50, BR75 and BR100 indicate that 25%, 50%, 75% and 100% of corn was replaced by broken rice in the basal diet, respectively (15.95%, 31.88%, 47.63% and 62.92% of BR, respectively, was added to the diets)
Summary
Corn is one of the main energy sources in poultry diets, providing 50–70% of the total energy of poultry. Corn can be used as human food and raw material for producing bioethanol. Under the trend of increasing global demand for corn, poultry producers are being forced to seek local. Animals 2020, 10, 1330 raw materials to replace corn in animal feed. China is the largest rice producer in the world, accounting for 27.63% of global rice production [14]. Broken rice (BR) with smaller particles is produced. As rice production and demand increase, the amount of BR produced worldwide increases. When paddy rice is made into white rice, approximately 15% will be converted into BR or powder due to processes such as defusing and polishing [15]. BR is not preferred for human consumption, and it is disposed of for animal feeds because of its lower cost
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