De Zutter Anneleen, Landschoot Sofie, Vermeir Pieter, Van Waes Chris, Muylle Hilde, Roldán-Ruiz Isabel, Douidah Laid, De Boever Johan, Haesaert Geert
Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Diepestraat 1, 9820 Bottelare, Belgium.
Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Valentin Vaerwyckweg 1, 9000 Ghent, Belgium.
Heliyon. 2022 Dec 30;9(1):e12760. doi: 10.1016/j.heliyon.2022.e12760. eCollection 2023 Jan.
Cereal forages, such as triticale forage, progressively gain interest as alternative crop for maize. The main study objective was to investigate the variation in potential feeding value of triticale forage among maturity stage, growing season and genotype, using total plant and stem fractions. Therefore, near infrared spectroscopy (NIRS) was evaluated as fast screening tool. The prediction ability was good (ratio of prediction to deviation, RPD ≥3.0) for total plant residual moisture, starch, sugars and for stem crude ash (CAsh) and neutral detergent fibre (aNDFom); suitable for screening (2.0 ≤ RPD <3.0) for total plant CAsh, acid detergent fibre (ADFom), digestibility of organic matter (IVOMD), digestibility of neutral detergent fibre (IVNDFD) and for stem total lignin (TL) and IVNDFD; poor (1.5 ≤ RPD <2.0) for total plant crude protein, crude fat, aNDFom, lignin (sa) and for stem Klason lignin (KL); unreliable (RPD <1.5) for stem residual moisture and acid soluble lignin (ASL). The evolution in potential feeding value of 36 genotypes harvested at the medium and late milk to the early, soft and hard dough stage was followed. The most important changes occurred between the late milk and early dough stage, with little variation in quality after the soft dough stage. During 2 growing seasons, variation in feeding value of 120 genotypes harvested at the soft dough stage was demonstrated. Interestingly, variation in stem IVNDFD is almost twice as high as for the total plant (CV 12.4% versus 6.6%). Furthermore, Spearman correlations show no link between dry matter yield and digestibility of genotypes harvested at the soft dough stage. Based on linear regression models ADFom appears as main predictor of both plant IVOMD and plant IVNDFD. Stem IVNDFD is particularly determined by KL.
谷物类饲料，如小黑麦饲料，作为玉米的替代作物越来越受到关注。主要研究目的是利用整株植物和茎部组分，研究小黑麦饲料在成熟阶段、生长季节和基因型之间潜在饲用价值的变化。因此，近红外光谱法（NIRS）被评估为一种快速筛选工具。对于整株植物的残留水分、淀粉、糖分以及茎部的粗灰分（CAsh）和中性洗涤纤维（aNDFom），预测能力良好（预测与偏差比，RPD≥3.0）；对于整株植物的粗灰分、酸性洗涤纤维（ADFom）、有机物消化率（IVOMD）、中性洗涤纤维消化率（IVNDFD）以及茎部的总木质素（TL）和IVNDFD，适合进行筛选（2.0≤RPD＜3.0）；对于整株植物的粗蛋白、粗脂肪、aNDFom、木质素（sa）以及茎部的克拉森木质素（KL），预测能力较差（1.5≤RPD＜2.0）；对于茎部的残留水分和酸溶性木质素（ASL），预测不可靠（RPD＜1.5）。跟踪了36个基因型在乳熟中期至后期收获至面团初期、软面团期和硬面团期的潜在饲用价值变化。最重要的变化发生在乳熟后期至面团初期，软面团期之后质量变化很小。在两个生长季节中，展示了120个基因型在软面团期收获时饲用价值的变化。有趣的是，茎部IVNDFD的变化几乎是整株植物的两倍（变异系数分别为12.4%和6.6%）。此外，斯皮尔曼相关性表明，软面团期收获的基因型的干物质产量与消化率之间没有关联。基于线性回归模型，ADFom似乎是植物IVOMD和植物IVNDFD的主要预测指标。茎部IVNDFD尤其由KL决定。
