Tall fescue is the main perennial grass of the pastures of the temperate region of Argentina. However, after flowering in spring, tall fescue loses productivity and quality. Based on this, the objective of this work was to evaluate the effects of different post‐grazing mechanical cutting managements on the forage mass, leaf proportion, stocking rate, liveweight gain and liveweight production of tall fescue pastures. The treatments were post‐grazing mechanical cutting at anthesis (FC), post‐grazing mechanical cutting throughout spring and summer (SSC), and no post‐grazing mechanical cutting (NC). The experiment was performed from 2011 to 2014 in Argentina. The greatest and lowest forage mass were determined in September–November and May–September respectively. The leaf proportion of the SSC treatment was greater than that of the NC treatment, except in September–November. NC had higher stocking rate and lower liveweight gain than SSC, and neither NC nor SSC differed from FC. The liveweight production of the treatments was characterized by a trade‐off between stocking rate and liveweight gain. We conclude that FC is an attractive management because, with a single post‐grazing cutting, swards remain productive and leafy.

中文翻译：

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高羊茅的放牧后割草管理会影响草皮的结构，草料和活重的生产

高羊茅是阿根廷温带地区牧场的主要多年生草。但是，春季开花后，高羊茅草会降低生产力和品质。基于此，这项工作的目的是评估不同放牧后机械切割管理对高羊茅草的草料质量，叶片比例，放养率，增重和活重产量的影响。处理方法是在花期进行放牧后机械切割（FC），在整个春季和夏季进行放牧后机械切割（SSC），并且不进行放牧后机械切割（NC）。该实验于2011年至2014年在阿根廷进行。分别在9月至11月和5月至9月确定最大和最小草料质量。SSC处理的叶片比例大于NC处理的叶片比例，除了9月至11月。NC比SSC具有更高的放养率和更低的体重增加，NC和SSC与FC均没有区别。治疗的活重生产的特点是在放养率和活重增加之间进行权衡。我们得出结论，FC是一种有吸引力的管理方式，因为单次放牧后，草皮仍能保持高产和多叶。