Interseeding crabgrass and berseem clover into sorghum–sudangrass for improved herbage accumulation, nutritive value, and weed suppression

IF 1.1 Q3 AGRONOMY
Justin C. Burt, Kathy J. Soder, Kelly M. Mercier
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引用次数: 0

Abstract

Sorghum–sudangrass hybrids (Sorghum. bicolor × Sorghum. bicolor var. sudanense; SSG) are common warm-season annual forages utilized in forage systems in the northeastern United States. However, weed control can be an issue, particularly in low-input forage systems. Interseeding annual forages, such as crabgrass (Digitaria sanguinalis L.; CG) and berseem clover (Trifolium alexandrinum L.; BC), is of interest to aid in weed control due to their rapid growth and desirable nutritive value. A 2-year small plot evaluation was conducted to determine the agronomic benefits of interseeding CG and BC via no-till drill or broadcast seeding into SSG established on different row spacings. Total herbage accumulation (HA) did not differ by year for any of the treatments evaluated (p > 0.13), despite having different row spacing and companion crop establishment methods. Botanical composition (BOT) varied among treatments (p < 0.01) for all forage components in both years. In 2022, treatments containing CG had lower percentage of SSG, BC, and weeds (other undesirable plant species), but in 2023 only the weeds percentage was lower in treatments with CG. Crude protein did not differ in either year (p > 0.55) across treatments; however, treatments containing high amounts of CG had the lowest (p = 0.03) total digestible nutrients in 2022 only. This study concluded that while row spacing and the interseeding of annual forage species did not affect the overall HA of SSG, they did affect the BOT and nutritive value of the stand. Future research is warranted for evaluating other compatible forages and contrasting defoliation methods to determine their impact on the agronomic production of these types of mixtures, such as grazing or stored forage production.

Abstract Image

在高粱-苏丹草中间种蟹草和三叶草,以提高牧草积累,提高营养价值,抑制杂草
高粱-苏丹草杂交种。双色×高粱。双色苏丹色变种;SSG)是美国东北部牧草系统中使用的常见暖季一年生牧草。然而,杂草控制可能是一个问题,特别是在低投入的饲料系统中。间种一年生牧草,如蟹草(Digitaria sanguinalis L.;CG)和三叶草(Trifolium alexandrinum L.;由于其生长迅速和理想的营养价值,有助于杂草控制。通过2年小块小区评价,确定了在不同行距的SSG中采用免耕钻播或撒播方式播种CG和BC的农艺效益。牧草累积总量(HA)在不同处理间无显著差异(p >;0.13),尽管具有不同的行距和伴生作物建立方法。植物成分(BOT)在不同处理间存在差异(p <;0.01)。在2022年,含CG处理的SSG、BC和杂草(其他不受欢迎的植物物种)百分比较低,但在2023年,只有杂草百分比较低。粗蛋白质在两年内均无差异(p >;各处理0.55);然而,含有大量CG的处理仅在2022年具有最低的总可消化营养物质(p = 0.03)。本研究认为,行距和一年生牧草间种对林分的总HA没有影响,但对林分的BOT和营养价值有影响。未来的研究有必要评估其他相容的牧草,并对比落叶方法,以确定它们对这些类型混合物的农艺生产的影响,如放牧或储存饲料生产。
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来源期刊
Crop, Forage and Turfgrass Management
Crop, Forage and Turfgrass Management Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
1.30
自引率
16.70%
发文量
49
期刊介绍: Crop, Forage & Turfgrass Management is a peer-reviewed, international, electronic journal covering all aspects of applied crop, forage and grazinglands, and turfgrass management. The journal serves the professions related to the management of crops, forages and grazinglands, and turfgrass by publishing research, briefs, reviews, perspectives, and diagnostic and management guides that are beneficial to researchers, practitioners, educators, and industry representatives.
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