Asian-Australas J Anim Sci. 2015 Jan;28(1):86-94. doi: 10.5713/ajas.14.0109.
This experiment was conducted to evaluate the chemical composition and amino acid (AA) digestibility of sunflower seed meal (SFSM) and to use this data to develop prediction equations for estimating AA digestibility for growing pigs. Ten SFSM were collected from five provinces in China. Twelve barrows (38.8±4.6 kg), fitted with ileal T-cannula were allotted into two 6×6 Latin square designs. Each of six experimental periods comprised a 5-d adaption period followed by a 2-d collection of ileal digesta. The ten test diets contained 50% SFSM as the sole source of AA. Another nitrogen-free diet was used to measure the basal endogenous losses of crude protein (CP) and AA. Chromic oxide (0.3%) was used as an inert marker in each diet. There was considerable variation (CV>10%) among the ten SFSM in chemical composition (dry matter [DM]). The concentration of CP and ether extract (EE) ranged from 29.33% to 39.09% and 0.88% to 11.33%, respectively. Crude fibre (CF), neutral detergent fibre and acid detergent fibre ranged from 21.46% to 36.42%, 38.15% to 55.40%, and 24.59% to 37.34%, respectively. There was variation among the ten SFSM in apparent ileal digestibility (AID) and standardized ileal digestibility (SID) for lysine and threonine, which ranged from 63.16 to 79.21 and 55.19% to 72.04% for AID and 67.03% to 82.07% and 61.97% to 77.01% for SID, respectively. The variation in CP and methionine ranged from 60.13% to 74.72% and 74.79% to 88.60% for AID and 66.70% to 79.31% and 77.16% to 90.27% for SID, respectively. Methionine was a good indicator to predict AA digestibility. These results indicate that conventional chemical composition of SFSM was variable (CV>10%) among the ten SFSM (DM). The results of AID, SID and prediction equations could be used to evaluate the digestibility of SFSM in growing pigs.
本实验旨在评估葵花籽粕（SFSM）的化学成分和氨基酸（AA）消化率，并利用这些数据为生长猪 AA 消化率的预测方程。从中国五个省份采集了 10 个 SFSM。12 头（38.8±4.6kg）装有回肠 T 型管的阉公猪，随机分配到两个 6×6 拉丁方设计中。每个 6 个实验期由 5 天适应期和 2 天回肠消化物收集期组成。10 种测试日粮均以 50% SFSM 作为 AA 的唯一来源。另一种无氮日粮用于测量粗蛋白（CP）和 AA 的基础内源性损失。每个日粮中均使用铬氧化合物（0.3%）作为惰性标记物。这 10 种 SFSM 在化学成分（干物质 [DM]）方面存在相当大的差异（CV>10%）。CP 和乙醚提取物（EE）的浓度范围分别为 29.33%至 39.09%和 0.88%至 11.33%。粗纤维（CF）、中性洗涤剂纤维和酸性洗涤剂纤维的范围分别为 21.46%至 36.42%、38.15%至 55.40%和 24.59%至 37.34%。这 10 种 SFSM 的赖氨酸和苏氨酸的表观回肠消化率（AID）和标准回肠消化率（SID）存在差异，范围分别为 63.16%至 79.21%和 55.19%至 72.04%的 AID 和 67.03%至 82.07%和 61.97%至 77.01%的 SID。CP 和蛋氨酸的变化范围分别为 60.13%至 74.72%和 74.79%至 88.60%的 AID 和 66.70%至 79.31%和 77.16%至 90.27%的 SID。蛋氨酸是预测 AA 消化率的良好指标。这些结果表明，10 种 SFSM 之间常规化学成分（CV>10%）差异较大（DM）。AID、SID 和预测方程的结果可用于评估生长猪 SFSM 的消化率。
