The invasion of Lehmann lovegrass (Eragrostis lehmanniana Nees) in rangelands of Chihuahua, Mexico, has resulted in a need for revegetation to recover lost forage productivity. Thus, new knowledge on generating alternatives to improve these invaded grasslands is of great importance. This study evaluated seedbeds prepared with unconventional tillage implements and seeded with a grass mixture to reduce the plant density of E. lehmanniana while increasing the productivity of an invaded semiarid grassland of Chihuahua. The unconventional tillage implements were: a Rangeland Harrow, which was used to prepare the Striped Harrowing and Full Harrowing seedbeds; Rangeland Rehabilitator, which was used to prepare the Deep-Stingray Subsoiler seedbed; and a Tandem-type Aerator Roller, which was used to prepare the Double-Digging Aeration seedbed. An area without tillage was left as a control. The seed mixture was composed of blue grama [Bouteloua gracilis (Willd. ex Kunth) Lag. ex Griffiths var. Hachita] (25%); sideoats grama [Bouteloua curtipendula (Michx.) Torr. ‘6107 Kansas’] (25%); green sprangletop [Leptochloa dubia (Kunth) Nees var. Van Horn] (5%); weeping lovegrass [Eragrostis curvula (Schrad.) Nees var. Ermelo] (40%), and Columbus grass [Sorghum almum Parodi] (5%). The experiment was conducted across 4 yr, and the evaluation started at the second year. Plant density and dry matter (DM) production were evaluated per species. In the control plot, the plant density of E. lehmanniana increased approximately 180% from the 2nd to the 4th year (18 to 50 plants m−2). The use of unconventional tillage implements for seedbed preparation and the inclusion of E. curvula in the seed mixture decreased E. lehmanniana density in more than 50% of plots and increased DM production in around 100% of plots. Considering the whole experimental period, in all the prepared seedbed treatments, E. curvula had the highest establishment and DM production of all the seeded species. The native species B. gracilis, B. curtipendula, and L. dubia had poor establishment in all the prepared seedbeds.

中文翻译：

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通过使用非常规耕作工具准备苗床并在半干旱草原播种来减少 Eragrostis lehmanniana 种群

莱曼爱情草的入侵（画眉草Nees) 在墨西哥奇瓦瓦的牧场，导致需要重新植被以恢复失去的草料生产力。因此，关于产生替代品以改善这些被入侵的草原的新知识非常重要。本研究评估了用非常规耕作工具准备的苗床并用草混合物播种以降低植物密度E. lehmanniana同时提高被入侵的吉娃娃半干旱草原的生产力。非常规耕作工具是： 用于准备条纹耙和全耙苗床的牧场耙；Rangeland Rehabilitator，用于准备 Deep-Stingray Subsoiler 苗床；和一个串联式曝气辊，用于准备双挖曝气苗床。留下没有耕作的区域作为对照。种子混合物由蓝色格莱玛组成 [细细小花（Willd. ex Kunth）滞后。前格里菲斯 var。八田] (25%); 侧麦片 [栀子花（密歇根州）托尔。'6107 堪萨斯'] (25%); 绿色花边 [千金子（昆特）尼斯变种。范霍恩] (5%); 哭泣的爱情草 [画眉草（Schrad。）Nees var。Ermelo] (40%) 和哥伦布草 [高粱矾模仿] (5%)。实验进行了 4 年，评估从第二年开始。对每个物种的植物密度和干物质 (DM) 产量进行了评估。在控制区，植物密度为E. lehmanniana从第 2 年到第 4 年增加了大约 180%（18 到 50 个工厂 m-2）。使用非常规耕作工具进行苗床准备和包括E. curvula在种子混合物中减少E. lehmanniana超过 50% 的地块的密度和 100% 的地块的 DM 产量增加。考虑到整个试验期，在所有准备好的苗床处理中，E. curvula在所有种子物种中具有最高的定殖和 DM 产量。本土物种B. gracilis,B. curtipendula， 和L. dubia在所有准备好的苗床中建立不良。