萝卜被广泛用作牲畜的补充剂,然而,对不同水分条件下饲料萝卜的营养价值认识不足。本研究旨在评估化学成分和体外,经过三种灌溉制度的两种饲料萝卜基因型(耐力和品系2)的瘤胃干物质降解性:充分浇水(W1),中等水分胁迫(W2),和严重的水分胁迫(W3)。分析显示,主要因素对饲料萝卜叶和块茎的化学成分和估计值具有统计学意义。特别是在跨基因型的粗蛋白(CP)和醚提取物(EE)方面。耐力和品系2叶对N均表现出交互效应,P,Ca,Mg,K,Na,Fe,Zn,Cu,Mn和Al。同时只有Na,K,Zn,和Cu在块茎中受到影响。耐力块茎,具体来说,显示显著较高(p<0.05)的CP含量,第2系块茎在W1下显示最高的CP含量。此外,耐力叶有较高水平的中性洗涤剂纤维,EE,和非结构性碳水化合物(NSC)与W1下的第2系叶子相比。发现块茎纤维存在显著差异,特别是耐久用酸性洗涤剂纤维,W3表现出更高的浓度水平。两种基因型在W3下都显示出较高的NSC。在两种基因型的水位之间观察到宏观和微观矿物质的显着差异。在24h和48h孵育期间的体外降解性方面,所有治疗均达到60-80%的可接受水平.不管水制度如何,Endurance和Line2均显示营养浓度满足最佳动物生产的最低要求。不过,品系2的营养价值和体外瘤胃干物质降解率明显高于耐力,在叶子和块茎中都很明显。值得注意的是,与充分浇水和严重水分胁迫处理相比,中等水分胁迫条件可产生更好的营养质量和体外瘤胃干物质降解性。这表明每个季节施用180-220毫米的水也可以产生这些基因型的更好的营养价值。
Fodder radish is widely used as a livestock supplement, however, the nutritional value of fodder radish under different water conditions remains insufficiently understood. This study aimed to assess the chemical components and in vitro, ruminal dry matter degradability of two fodder radish genotypes (Endurance and Line 2) subjected to three irrigation regimes: well-watered (W1), moderate water stress (W2), and severe water stress (W3). The analysis revealed statistically significant effects of the main factors on the chemical composition and estimates of fodder radish leaves and tubers, particularly in terms of Crude Protein (CP) and Ether Extract (EE) across genotypes. Both Endurance and Line 2 leaves exhibited interaction effects on N, P, Ca, Mg, K, Na, Fe, Zn, Cu, Mn and Al. Meanwhile only Na, K, Zn, and Cu were affected in tubers. Endurance tubers, specifically, displayed significantly higher (p < 0.05) CP content, with Line 2 tubers showing the highest CP content under W1. Furthermore, Endurance leaves had higher levels of Neutral Detergent Fibre, EE, and Non-Structural Carbohydrate (NSC) compared to Line 2 leaves under W1. Notable differences in tuber fibres were found, specifically in Acid Detergent Fibre for Endurance, with W3 exhibiting a higher concentration level. Both genotypes displayed higher NSC under W3. Significant variations in macro and mmicro minerals were observed between water levels in both genotypes. In terms of in vitro degradability during the 24 h and 48 h incubation periods, all treatments met the acceptable level of 60-80 %. Regardless of water regimes, both Endurance and Line 2 showed nutrient concentrations meeting the minimum requirements for optimal animal production. Though, Line 2 exhibits significantly higher nutritional value and in vitro ruminal dry matter degradability than Endurance, evident in both leaves and tubers. Notably, moderate water stress conditions yielded better nutritional quality and in vitro ruminal dry matter degradability compared to both well-watered and severe water stress treatments. This suggests that applying 180-220 mm of water per season can also yield better nutritive value of these genotypes.