Growth in the craft brewing industry has increased the demand for locally sourced malting barley (Hordeum vulgare L.) grain in the Eastern United States. However, most malting barley seeding rate recommendations are from the Northern Great Plains, the Pacific Northwest, and Western Canada. Therefore, seeding rate research was needed in the humid growing environment of the Eastern United States. The objective of this research was to identify the agronomic optimum seeding rate (AOSR) where grain yield is maximized, and identify the seeding rate that met or exceeded grain quality parameters. An experiment with five seeding rate treatments ranging from 1.9 to 6.2 million seeds ha^–1 was established at eight site-years in Ohio. Under normal growing conditions, the AOSR was 3.8–6.2 million seeds ha^–1 (average 4.5 million seeds ha^–1). When plants experienced winter injury, the AOSR was greater at 5.3–5.4 million seeds ha^–1. Grain quality parameters of protein, germination, and deoxynivalenol all tended to improve with increasing seeding rate. Seeding rates of 4.5–4.7 million seeds ha^–1 should maximize yield most years while meeting grain quality parameters. However, regions that experience winter temperatures <15°C without snow coverage should increase seeding rates due to increased chance of winter injury reducing plant stand.

中文翻译：

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播种量对冬麦芽产量和品质的影响

精酿啤酒行业的增长增加了美国东部对本地采购的麦芽大麦 ( Hordeum vulgare L.) 谷物的需求。然而，大多数麦芽大麦播种率建议来自北部大平原、太平洋西北部和加拿大西部。因此，需要在美国东部潮湿的生长环境中进行播种率研究。本研究的目的是确定粮食产量最大化的农艺最佳播种率 (AOSR)，并确定满足或超过粮食质量参数的播种率。5 种播种率处理的试验，播种量从 1.9 到 620 万公顷^–1成立于俄亥俄州的八个站点年。在正常生长条件下，AOSR 为 3.8-620 万种子 ha ^-1（平均 450 万种子 ha ^-1）。当植物经历冬季伤害时，AOSR 更大，为 5.3-540 万颗种子 ha ^–1。蛋白质、发芽率和脱氧雪腐镰刀菌烯醇等籽粒品质参数均随着播种量的增加而提高。4.5–470 万种子 ha ^–1的播种量应在大多数年份最大限度地提高产量，同时满足谷物质量参数。然而，在没有积雪的情况下，冬季气温 < 15°C 的地区应该提高播种率，因为冬季伤害减少植物林分的机会增加。