Qiao Shiyan, Thacker P A
Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
Arch Anim Nutr. 2004 Aug;58(4):287-94. doi: 10.1080/00039420410001701387.
The following experiment was conducted using the mobile nylon bag technique (MNBT) to determine dry matter and energy digestibility in traditional feeds as well as non-traditional feeds in order to calculate digestible energy (DE) values for use in ration formulation programmes. A total of 22 ingredients were tested in this experiment including the traditional cereal grains barley, corn, oats and wheat, as well as secondary cereal grains such as normal and low viscosity rye, low lignin and high fat oat groats, wheat heavies and # 1 wheat screenings and a new bread wheat designated as CDC Teal. Three legumes (lupines, peas and dehydrated alfalfa), three varieties of canary seed (CDC Maria, dehulled CDC Maria and Keet), and raw and micronized canola seed were tested as protein sources. Finally, three oilseed meals obtained from the Chinese feed industry (Chinese rapeseed meal, Chinese cottonseed meal and extruded full-fat soybean meal) were also included. After simulating gastric digestion the nylon bags were inserted into the duodenum of five barrows through simple duodenal T-cannulae. Eight bags were administered to each pig daily. Ten nylon bags were prepared for each feed with two bags being inserted into each of the five barrows. A total of 220 bags were inserted over a 7-day period. The overall results of this experiment indicate that the MNBT has great potential for use in determining the digestible energy content of swine feeds. For the most part, values obtained in the present experiment compared favourably with previously published values. Four feedstuffs produced digestible energy values that differed by greater than 5% from previously reported values. However, variation in chemical content provided a reasonable explanation for these discrepancies. The MNBT has several advantages compared with conventional digestibility methods in that many feeds can be tested in a relatively short duration of time with significantly fewer animals being used, only small amounts of feed are required and the test allows for energy measurements in feedstuffs that would not normally be fed to pigs as a single ingredient. Additional research on a wider variety of feedstuffs should be conducted to confirm the potential of the MNBT as a tool to accurately determine DE values for swine.
采用移动尼龙袋技术（MNBT）进行了以下实验，以测定传统饲料和非传统饲料中的干物质和能量消化率，从而计算用于日粮配方程序的消化能（DE）值。本实验共测试了22种原料，包括传统谷物大麦、玉米、燕麦和小麦，以及二级谷物，如普通和低粘度黑麦、低木质素和高脂肪燕麦碎粒、小麦麸皮和1号小麦筛下物，还有一种名为CDC Teal的新型面包小麦。三种豆类（羽扇豆、豌豆和脱水苜蓿）、三种金丝雀种子品种（CDC Maria、去皮CDC Maria和Keet）以及生的和微粉化的油菜籽作为蛋白质来源进行了测试。最后，还包括从中国饲料行业获得的三种油籽粕（中国菜籽粕、中国棉籽粕和挤压全脂大豆粕）。模拟胃消化后，通过简单的十二指肠T型套管将尼龙袋插入五头公猪的十二指肠。每头猪每天投喂8个袋子。每种饲料准备10个尼龙袋，将其中两个袋子分别插入五头公猪中的每一头。在7天的时间里总共插入了220个袋子。本实验的总体结果表明，MNBT在测定猪饲料的消化能含量方面具有很大潜力。在很大程度上，本实验获得的值与先前公布的值相比具有优势。四种饲料产生的消化能值与先前报道的值相差超过5%。然而，化学成分的差异为这些差异提供了合理的解释。与传统消化率方法相比，MNBT有几个优点，即可以在相对较短的时间内用显著更少的动物测试多种饲料，只需要少量饲料，并且该测试允许对通常不会作为单一成分喂给猪的饲料进行能量测量。应该对更多种类更广的饲料进行进一步研究，以确认MNBT作为准确测定猪DE值工具的潜力。
