多花黑麦草在生长肉兔上的营养价值评定

doi:10.11686/cyxb20140542

摘要/Abstract

摘要：

本试验旨在评定初花期多花黑麦草在生长肉兔上的营养价值。试验选取60日龄平均体重(2.20±0.32)kg的健康新西兰兔24只,随机分为2组,每组12个重复,每个重复1只。试验饲粮采用套算法进行配制,多花黑麦草的替代比例为20%;试验采用全收粪法进行消化试验,预试期和正试期各7 d。结果表明:1)多花黑麦草中总能、干物质、粗蛋白、粗脂肪、粗纤维、中性洗涤纤维、酸性洗涤纤维、粗灰分、钙、总磷和无氮浸出物含量分别为16.78 MJ/kg、92.24%、10.20%、1.64%、26.09%、51.80%、31.35%、7.72%、0.66%、0.28%和46.59%;2)多花黑麦草在生长肉兔中的表观消化能为7.21 MJ/kg,生长肉兔对多花黑麦草中总能、干物质、粗蛋白、粗脂肪、粗纤维、中性洗涤纤维、酸性洗涤纤维、粗灰分、钙、总磷和无氮浸出物的表观消化率分别为33.45%、48.36%、44.18%、84.45%、25.91%、22.73%、22.25%、26.10%、62.87%、13.94%和61.42%。由结果可知:初花期多花黑麦草中粗纤维、中性洗涤纤维、酸性洗涤纤维含量相对较高,总磷含量相对较低;生长肉兔对初花期多花黑麦草中不同营养成分的消化率存在一定差异,其中以粗脂肪、粗纤维、钙、无氮浸出物的表观消化率较高,总磷的表观消化率较低。

Abstract:

The experiment was carried out to evaluate the nutritional value of early flowering Italian ryegrass for growing rabbits. A total of 24 New Zealand rabbits at 60 days of age with an average weight of (2.20±0.32) kg were used in a completely randomized design, which consisted of 2 groups and 12 replicates in each group. A basal diet was formulated to meet requirements of growing rabbits and the experiment diet was formulated by substituting 20% of the basal diet with Italian ryegrass. Fecal apparent digestibility of major nutrients in Italian ryegrass for growing rabbits was measured. Both pre-trial and trial period was 7 days. The results showed: 1) Gross energy, dry matter, crude protein, ether extract, crude fiber, neutral detergent fiber, acid detergent fiber, crude ash, Ca, total P and nitrogen free extract contents of Italian ryegrass were 16.78 MJ/kg, 92.24%, 10.20%, 1.64%, 26.09%, 51.80%, 31.35%, 7.72%, 0.66%, 0.28% and 46.59%, respectively. 2) The apparent digestible energy of Italian ryegrass was 7.21 MJ/kg. Apparent digestibility of gross energy, dry matter, crude protein, ether extract, crude fiber, neutral detergent fiber, acid detergent fiber, crude ash, Ca, total P and nitrogen free extract in Italian ryegrass were 33.45%, 48.36%, 44.18%, 84.45%, 25.91%, 22.73%, 22.25%, 26.10%, 62.87%, 13.94% and 61.42%, respectively. In conclusion, contents of crude fiber, neutral detergent fiber, acid detergent fiber are higher and contents of ether extract, total P are lower in Italian ryegrass. There are certain differences between the nutrient digestibility of Italian ryegrass for growing rabbits, the apparent digestibility of ether extract, crude fiber, Ca, nitrogen free extract are higher, while the apparent digestibility of total P is lower in the Italian ryegrass for growing rabbits.

中图分类号:

S816.15

宋中齐,干友民,田刚,金华,薄正熙,王秋爽,符佩斌,王永. 多花黑麦草在生长肉兔上的营养价值评定[J]. 草业学报, 2014, 23(5): 352-358.

SONG Zhong-qi,GAN You-min,TIAN Gang,JIN Hua,BO Zheng-xi,WANG Qiu-shuang,FU Pei-bin,WANG Yong. Nutritional values of Italian ryegrass for growing rabbits[J]. Acta Prataculturae Sinica, 2014, 23(5): 352-358.

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