Solarization (covering soil and vegetation with plastic) has long been used in agriculture to control undesirable plants, but solarization of invasive plants in rangelands has shown mixed and species-specific results. Yellow bluestem (Bothriochloa ischaemum (L.) Keng var. songarica (Rupr. ex Fisch & C.A. Mey) Celarier & Harlan), an invasive perennial C₄ grass, is common throughout the southern Great Plains and is not controlled by winter prescribed fire. We tested whether solarization (tarping) with black plastic, combined with winter prescribed fire, could control yellow bluestem. We applied three treatments (with four replicates): solarization (August to November 2017) + fire (January 2018), trimming + fire, and fire only. Results after two growing seasons show that total yellow bluestem cover in solarized + fire plots was reduced to 54% ± 10% (mean ± standard error), lower than trimmed + fire (82% ± 5%, p < 0.01) and fire only plots (78% ± 6%, p = 0.01). Forb cover in solarized + fire plots (15% ± 4%) was much higher than trimmed + fire (4% ± 1%, p < 0.01) and fire only plots (3% ± 1%, p < 0.01). Native forb richness was only slightly higher in solarized + fire plots (16 ± 2 species) compared to fire only (10 ± 2 species, p = 0.08) and trimmed + fire plots (10 ± 1 species, p = 0.08). Interestingly, native forb richness in all plots increased compared to pre-treatment values (2 ± 1 species for all treatments, p < 0.01). Solarization + winter fire can slightly decrease yellow bluestem cover and greatly increase native forb cover, creating islands of diversity in otherwise low-diversity grasslands. However, repeated treatments or alternative techniques will be needed for full control of yellow bluestem.

长期以来，日光化（用塑料覆盖土壤和植被）已被用于农业中控制不良植物，但是牧场中入侵植物的日光化显示出混合的和特定物种的结果。黄色须芒草（白羊草（L.）铿变种准噶尔沙（落叶松前甘草＆CA嵋）Celarier＆哈伦），侵入性多年生Ç ₄草，在整个大平原南部很普遍，不受冬季规定的大火控制。我们测试了用黑色塑料进行的日晒（防水布）结合冬季规定的火情能否控制黄色蓝茎。我们应用了三种处理方式（一式四份）：日晒（2017年8月至2017年11月）+火（2018年1月），修剪+火和仅火处理。两个生长季节后的结果表明，日晒+火场中的黄色蓝茎总覆盖率降低至54％±10％（均值±标准误差），低于修剪+火场（82％±5％，p <0.01）并且仅火场图（78％±6％，p = 0.01）。日晒+火场（15％±4％）的覆盖率比修剪+火（4％±1％，p <0.01）和仅火场（3％±1％，p <0.01）高得多。与仅火种（10±2种，p = 0.08）和修剪+火种（10±1种，p = 0.08）相比，日光+火种（16±2种）的原生草丰富度略高。有趣的是，与处理前的值相比，所有地块的天然前for丰富度都增加了（所有处理为2±1种，p <0.01）。日晒+冬季大火可以稍微减少黄色的茎干覆盖，并大大增加原生草的覆盖，在原本为低多样性的草原上形成多样性的岛屿。然而，将需要重复治疗或替代技术来完全控制黄蓝茎。01）。日晒+冬季大火可以稍微减少黄色的茎干覆盖，并大大增加原生草的覆盖，在原本为低多样性的草原上形成多样性的岛屿。然而，将需要重复治疗或替代技术来完全控制黄蓝茎。01）。日晒+冬季大火可以稍微减少黄色的茎干覆盖，并大大增加原生草的覆盖，在原本为低多样性的草原上形成多样性的岛屿。然而，将需要重复治疗或替代技术来完全控制黄蓝茎。