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Cover crop biomass production across establishment methods in mid‐Atlantic corn
Agronomy Journal ( IF 2.1 ) Pub Date : 2020-08-17 , DOI: 10.1002/agj2.20414
Virginia M. Moore 1, 2 , Steven B. Mirsky 2
Affiliation  

Drill‐interseeding, broadcast‐interseeding, and post‐harvest drilling for establishment of overwintering cover crops after no‐till corn (Zea mays L.) each present distinct challenges and benefits. Experiments were conducted at the Beltsville Agricultural Research Center (Beltsville, MD) across three growing seasons (2013–2014, 2014–2015, 2015–2016) to evaluate the relative performance of these three establishment methods across four cover crop treatments: (a) cereal rye (Secale cereale L.), (b) annual ryegrass [Lolium perenne L. ssp. multiflorum (Lam.) Husnot], (c) a legume mixture including red clover (Trifolium pratense L.), crimson clover (Trifolium incarnatum L.), and hairy vetch (Vicia villosa Roth), and (d) a grass–legume mixture including annual ryegrass, red clover, crimson clover, and hairy vetch. Both fall and spring biomass showed a significant three‐way interaction effect among cover crop, establishment method, and year. Cereal rye had the greatest biomass with late post‐harvest drilling but produced less fall and spring biomass than other cover crops in the drill‐interseeded treatments in two of the three growing seasons. The drill‐interseeded legume mixture produced less spring biomass than annual ryegrass and the grass–legume mixture when established at a later corn growth stage. Our results highlight potential pitfalls of each establishment method and cover crop, depending on annual variability in weather and management.

中文翻译:

涵盖大西洋中部玉米各种建立方法下的作物生物量生产

在免耕玉米之后(Zea mays L.)进行越冬覆盖作物的播种播种,播种播种和收获后演习都面临着独特的挑战和好处。在三个生长季节(2013–2014、2014–2015、2015–2016)的Beltsville农业研究中心(Beltsville,MD)进行了实验,以评估这三种建立方法在四种覆盖作物处理中的相对性能:(a)谷物黑麦(Secale graine L。),(b)一年生黑麦草[ Lolium perenne L. ssp。多花(Lam。)Husnot],(c)包括红三叶草(Trifolium pratense L.),深红色三叶草(Trifolium incarnatum)的豆类混合物L.),长毛紫etch(Vicia villosa Roth),以及(d)草豆科植物混合物,包括一年生黑麦草,红三叶草,深红色三叶草和长毛紫etch。秋季和春季生物量均表现出明显的三季交互作用,包括覆盖作物,建立方法和年份。在收获后后期,谷物黑麦的生物量最大,但在三个生长季节中的两个季节,在播种交织的处理中,秋季和春季的生物量低于其他覆盖作物。与玉米一年生黑麦草和草-豆科植物混合物在玉米生长后期阶段建立时,与钻交织在一起的豆科植物混合物产生的春季生物量要少。我们的结果强调了每种建立方法和覆盖作物的潜在陷阱,这取决于天气和管理的年度变化。
更新日期:2020-08-17
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