ABSTRACT This study was conducted to determine apparent total tract digestibility (ATTD) of phosphorus (P) and metabolisable energy (ME) concentrations for pigs of 32 different genotypes (n = 8 per grain species) of barley, rye, triticale and wheat. All genotypes were grown at the same location under the same field conditions and were fed to growing castrated crossbred pigs (initial body weight: 31.1 ± 6.95 kg) using a series of duplicate 3 × 3 Latin square designs. A basal ration, which was deficient in P, and 32 experimental rations containing 400 g/kg DM of the basal ration and 600 g/kg DM of the corresponding cereal grain were mixed. Pigs were kept in metabolism crates and the total collection method was used for separate faeces and urine collections with 7-d adaptation and 7-d collection periods. The mean ATTD of P was greater (p < 0.05) for wheat than for triticale, rye or barley (59.4%, 50.4%, 44.9% and 44.4%, respectively, for the mean of each grain species). Within-grain species differences (p < 0.05) among genotypes were obtained for ATTD of P of barley and triticale. The concentrations of ME of triticale and wheat were higher (p < 0.05) than that of barley and rye (16.1 and 16.2 vs. 14.9 and 14.8 MJ ME/kg DM, respectively). Differences in ME concentration among genotypes within a grain species (p < 0.05) were found for barley, triticale and wheat. No differences were found for rye. Compared to literature data the present study showed, in part, considerable differences in ATTD of P and ME concentration. These results should be taken into account for accurate pig ration formulation with regard to minimised P output and efficient use of ME. No significant relationships were detected between ATTD of P and phytic acid concentration or phytase activity in the grain genotypes in this study.

中文翻译：

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饲喂生长猪的现代小麦、大麦、黑麦和黑小麦基因型的磷消化率和代谢能浓度

摘要 本研究旨在确定大麦、黑麦、黑小麦和小麦 32 种不同基因型（每粒种 8 种）猪的磷 (P) 表观总消化率 (ATTD) 和代谢能 (ME) 浓度。所有基因型都在相同的田间条件下在相同的位置生长，并使用一系列重复的 3 × 3 拉丁方设计喂养生长的阉割杂交猪（初始体重：31.1 ± 6.95 kg）。将缺乏 P 的基础日粮与含有 400 g/kg DM 基础日粮和 600 g/kg DM 相应谷物的 32 份实验日粮混合。猪被关在代谢箱中，总收集方法用于分别收集粪便和尿液，7 天适应期和 7 天收集期。P 的平均 ATTD 更大（p < 0。05) 小麦比黑小麦、黑麦或大麦（每种谷物物种的平均值分别为 59.4%、50.4%、44.9% 和 44.4%）。大麦和小黑麦的 P 的 ATTD 获得了基因型之间的粒内物种差异 (p < 0.05)。黑小麦和小麦的 ME 浓度（p < 0.05）高于大麦和黑麦（分别为 16.1 和 16.2 与 14.9 和 14.8 MJ ME/kg DM）。对于大麦、黑小麦和小麦，发现谷物物种内基因型之间 ME 浓度的差异（p < 0.05）。黑麦没有发现差异。与文献数据相比，本研究部分显示 P 和 ME 浓度的 ATTD 存在相当大的差异。这些结果应该被考虑到精确的猪日粮配方中，以最大限度地减少磷输出和有效利用 ME。