Greenhouse experiments were conducted in 2016 at Pontotoc and Verona, MS. On March 3 (Pontotoc) and March 7 (Verona), landscape fabric was placed in the bottom of polyethylene lugs, each 0.22 m2, then approximately 5 cm of a 1:1 (v/v) blend of soilless potting media and masonry sand was added. ‘Beauregard’ sweetpotato [Ipomoea batatas (L). Lam.] storage roots weighing between 85 and 227 g, and several with emerging sprouts ≤1 cm, were placed longitudinally in a single layer on the substrate, then covered with an additional 3 cm of the substrate. Sprouted yellow nutsedge (Cyperus esculentus L.) tubers were transplanted equidistantly into sweetpotato-containing lugs at six densities: 0, 18, 36, 73, 109, and 145 m−2. Trials were terminated 55 and 60 d after planting at Pontotoc and Verona, respectively. Predicted total sweetpotato stem cuttings (slips) decreased linearly from 399 to 312 m−2 as C. esculentus density increased from 0 to 145 m−2. Predicted total slip dry weight at a C. esculentus density of 145 m−2 was reduced 21% compared with 0 m−2. Predicted rotten sweetpotato storage roots increased from 2.6 to 11.3 m−2 as C. esculentus density increased from 0 to 145 m−2. In response to increasing C. esculentus density, sweetpotato seed roots exhibited increased proximal-end dominance.

中文翻译：

---

黄色坚果（Cyperus esculentus）对模拟甘薯植物床的干扰

温室实验于 2016 年在密西西比州的庞托托克和维罗纳进行。3 月 3 日（蓬托托克）和 3 月 7 日（维罗纳），景观织物被放置在聚乙烯接线片的底部，每个 0.22 m2，然后添加约 5 厘米的 1:1 (v/v) 无土盆栽介质和砖石砂混合物。'Beauregard' 甘薯 [番薯(L)。Lam.] 重量在 85 和 227 g 之间的贮藏根，以及一些新芽≤1 cm，纵向放置在基质上的单层中，然后用另外 3 cm 的基质覆盖。发芽的黄色坚果（香附L.) 块茎以六种密度等距移植到含甘薯的凸耳中：0、18、36、73、109 和 145 m-2. 试验分别在 Ponttoc 和 Verona 种植后 55 天和 60 天终止。预测的甘薯茎插条（条）从 399 线性下降到 312 m-2作为C. esculentus密度从 0 增加到 145 m-2. 预测的总滑差干重C. esculentus密度 145 m-2与 0 米相比减少了 21%-2. 预测的腐烂甘薯贮藏根从 2.6 增加到 11.3 m-2作为C. esculentus密度从 0 增加到 145 m-2. 为应对日益增加的C. esculentus密度，甘薯种子根表现出增加的近端优势。