A feeding trial was conducted to evaluate the effects of increasing alfalfa leaf levels on the performance of organic broilers. The impact of drying temperature on the nutritional value of alfalfa leaves and thereby on broiler performance was studied using alfalfa leaves dried at either low (alfalfa leaves low temperature (ALLT)) or high temperatures (alfalfa leaves (AL)). Six hundred male Hubbard JA‐757 broilers were divided into five feeding groups (Control (C), AL2, AL3, AL4 and ALLT5). Alfalfa leaf content was increased in each of the three fattening phases by 5% (C: 0%–0%–0%; AL2: 0%–5%–10%; AL3: 5%–10%–15%; AL4: 10%–15%–20%; and ALLT5: 10%–15%–20%). At the end of the experiment, broilers in group C had the highest body and carcass weights. Groups AL3, AL4 and ALLT5 showed the lowest body and carcass weights. In particular, the early introduction of alfalfa leaves (5% in phase 1) and high alfalfa leaf content (15%–20%) significantly decreased performance. Antinutritional substances such as saponins occur in alfalfa. In fact, the saponin analysis showed high contents of 3‐Glc‐Glc‐28‐Ara‐Rha‐medicagenic acid and HexA‐dHex‐Pen‐Pen‐Pen‐zanhic acid in both high‐ and low‐temperature alfalfa leaves.

中文翻译：

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苜蓿（Medicago sativa）叶片水平增加对有机肉鸡育肥和屠宰性能的影响。

进行了饲喂试验，以评估苜蓿叶水平提高对有机肉鸡生产性能的影响。使用在低温（苜蓿叶低温（ALLT）或高温（苜蓿叶（AL））下干燥）的苜蓿叶，研究了干燥温度对苜蓿叶营养价值的影响，从而对肉鸡生产性能的影响。将600只哈伯德JA‐757雄性肉鸡分为五个饲养组（对照组（C），AL2，AL3，AL4和ALLT5）。在三个育肥阶段中，苜蓿叶含量均增加了5％（C：0％–0％–0％； AL2：0％–5％–10％； AL3：5％–10％–15％； AL4 ：10％–15％–20％； ALLT5：10％–15％–20％）。实验结束时，C组肉鸡的体重和car体重量最高。AL3，AL4和ALLT5组的体重和car体重量最低。尤其是，早期引入苜蓿叶（第一阶段为5％）和高苜蓿叶含量（15％–20％）会显着降低性能。苜蓿中含有抗营养物质，如皂苷。实际上，皂苷分析显示高温和低温苜蓿叶中3-Glc-Glc-28-Ara-Rha-成药酸和HexA-dHex-Pen-Pen-Pen-zanhic酸含量高。