几种农作物秸秆与苜蓿的不同配比对体外日粮组合效应的影响

doi:10.16431/j.cnki.1671-7236.2018.02.014

摘要/Abstract

摘要：

为了探讨几种农作物秸秆（洋芋蔓、荞麦秸秆、大豆秸秆、冰草）与苜蓿的不同配比对绵羊日粮组合效应的影响，本试验通过体外产气法测定了精粗比（concentrate supplement：roughage，C：R）为40：60下，精料补充料：秸秆：苜蓿干草分别为40：60：0、40：50：10、40：40：20、40：30：30、40：20：40、40：10：50、40：0：60时的28组日粮组合及6种原料分别培养2、4、6、9、12、24、36、48、72、96 h的产气量（GP），并通过24 h产气量（GP_{24 h}）和各组合的加权估算值计算出各组合的组合效应值（AE）。结果表明：对于洋芋蔓各组，洋芋蔓比例为0、10及30的各组AE较高，其中洋芋蔓0组AE显著大于洋芋蔓50组（P < 0.05）；荞麦秸秆和大豆秸秆各组AE均无显著差异（P > 0.05），当荞麦秸秆比例在20、30、40、50时各组合的AE较高，其中以荞麦秸秆比例为40最优；大豆秸秆比例为20、30、40、50、60时各组AE较高，结合其他产气参数，以大豆秸秆50组最优。对于冰草各组，冰草比例为10和20组AE较高，极显著高于冰草50、60组（P < 0.01），冰草10组显著大于冰草40组（P < 0.05），冰草30组极显著大于60组（P < 0.01），冰草0组显著大于冰草60组（P < 0.05）。综合以上结果，低比例洋芋蔓（0、10、30）或冰草（10、20）与高比例苜蓿配比，高比例大豆秸秆（50）或荞麦秸秆（40）与低比例苜蓿配比可获得较高的日粮AE。

关键词: 组合效应; 洋芋蔓; 荞麦秸秆; 大豆秸秆; 冰草; 苜蓿; 精料补充料

Abstract:

This experiment was conducted to investigate the effects of different ratios of crop stalks (potato vine, buckwheat straw, soybean straw, wheatgrass) and alfalfa on the associative effects (AE) of diets in vitro. Concentrate supplement:straw:alfalfa were 40:60:0, 40:50:10, 40:40:20, 40:30:30, 40:20:40, 40:10:50 and 40:0:60,while the concentrate-roughage ratio (C:R) was 40:60. Gas production (GP) was recorded at 0, 2, 4, 6, 9, 12, 24, 36, 48, 72 and 96 h. The AE was defined as the difference between the observed in vitro GP_{24 h} and the predicted value from individual feed fermented alone. The results showed as follows:For potato vine, the AE of 0, 10, 30 potato vine groups were greater, and the AE of 0 potato vine group was significantly greater than 50 potato vine group (P < 0.05). The AE of all groups of both buckwheat straw and soybean straw were not significantly different (P > 0.05). For buckwheat straw, the AE of 20, 30, 40, 50 buckwheat straw groups were greater according to gas parameters in vitro, especially 40 buckwheat straw group. For soybean straw, the AE of 20, 30, 40, 50, 60 soybean straw groups were greater, especially the group of 50 soybean straw group. For wheatgrass, the AE of 10, 20 wheatgrass groups were greater, and they were extremely significantly greater than 50 and 60 wheatgrass groups (P < 0.01), 10 wheat grass group was significantly greater than 40 wheatgrass group (P < 0.05), 30 wheatgrass group was extremely significantly greater than 60 wheatgrass group (P < 0.01), and 0 wheatgrass group was significantly greater than 60 wheatgrass group (P < 0.05). It was concluded that the AE would be better when high levels of alfalfa and low levels of potato vine (0, 10, 30) or wheatgrass (10, 20) were combined, and low levels of alfalfa and high levels of soybean straw (50) or buckwheat straw (40) were combined.

Key words: associative effects; potato vine; buckwheat straw; soybean straw; wheatgrass; alfalfa; concentrate supplement

中图分类号:

S816.5

袁玖, 王军军, 俞海山, 平丽莹, 祁鹏, 王丹丹, 马贵山, 万欣杰. 几种农作物秸秆与苜蓿的不同配比对体外日粮组合效应的影响[J]. 《中国畜牧兽医》, 2018, 45(2): 400-408.

YUAN Jiu, WANG Junjun, YU Haishan, PING Liying, QI Peng, WANG Dandan, MA Guishan, WAN Xinjie. Effect of Different Ratios of Crop Stalks and Alfalfa on Associative Effects of Diets in vitro[J]. , 2018, 45(2): 400-408.

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