Crop Science Department, Faculty of Agriculture, Alexandria University, Alexandria, Egypt.
Animal and Fish Production Department, Faculty of Agriculture, Alexandria University, Alexandria, Egypt.
J Sci Food Agric. 2020 Aug;100(10):3857-3865. doi: 10.1002/jsfa.10424. Epub 2020 Apr 27.
Berseem clover is the main forage crop grown in Mediterranean regions. There are plenty of cultivars that possess variability in their productivity and quality among the different cuts. Therefore, accurate agronomic and qualitative characterization is crucial for selecting the most promising cultivars for breeding and feeding purposes. In the present study, the agronomic characteristics, ruminal degradability and fermentation measures of five cuts of the five most prominent Egyptian beseem clover cultivars (Helaly, Serw, Giza6, Gemmeza1 and Sakha4) were evaluated.
The Giza6 cultivar produced a significantly higher fresh yield and high whole plant dry matter content on the 3rd cut. Giza6 was among the superior cultivars in crude protein content and had the highest values of gas production at the 3rd cut, and ruminal degraded acid detergent fiber and propionate concentrations at the 2nd cut, at the same time as presenting the lowest ammonia concentrations at the 3rd and 5th cuts. Overall, the 3rd cut produced significantly higher fresh yield across all cultivars, except for Sakha4. The 3rd cut also produced a higher leaf to stem ratio compared to the 4th and 5th cuts. The 1st three cuts had higher degraded neutral detergent fiber than the 4th and 5th cuts. The 1st cut was characterized by low propionate concentration in the Helaly and Gemmeza1 cultivars compared to the other cuts.
Expanded production of the high-yielding, high-quality cultivar Giza6 is recommended. When harvesting, three cuts is optimal for berseem clover cultivation for breeding and feeding programs. © 2020 Society of Chemical Industry.
紫花苜蓿是地中海地区主要的饲料作物。有许多品种在不同茬次的生产力和质量方面存在变异性。因此，准确的农艺和定性特征对于选择最有前途的品种进行育种和饲养目的至关重要。本研究评估了 5 个埃及紫花苜蓿主要品种（Helaly、Serw、Giza6、Gemmeza1 和 Sakha4）的 5 茬的农艺特性、瘤胃降解率和发酵措施。
Giza6 品种在第 3 茬时的鲜草产量和整个植株干物质含量显著较高。Giza6 在粗蛋白含量方面属于优质品种，在第 3 茬时具有最高的产气量值，在第 2 茬时具有最高的瘤胃降解酸性洗涤纤维和丙酸浓度，同时在第 3 茬和第 5 茬时具有最低的氨浓度。总体而言，除了 Sakha4 之外，所有品种的第 3 茬鲜草产量都显著较高。第 3 茬的叶茎比也高于第 4 茬和第 5 茬。第 1 茬到第 3 茬的中性洗涤纤维降解率高于第 4 茬和第 5 茬。第 1 茬的 Helaly 和 Gemmeza1 品种的丙酸浓度较低。
建议扩大高产、优质品种 Giza6 的生产。在进行紫花苜蓿的收割时，三茬是进行育种和饲养计划的最佳选择。© 2020 化学工业协会。
