Data from USDA ARS High Plains Grasslands Research Station (East Unit) near Cheyenne, WY: Yearling cattle weight gains managed in light, moderate and heavily stocked pastures (1982-2022)

The USDA-Agricultural Research Service High Plains Grasslands Research Station (HPGRS) is located in Cheyenne, Wyoming, USA. In 1982, a long-term stocking rate study on northern mixed-grass prairie was initiated with season-long (early June to October) grazing. Stocking rates defined as light (35% below NRCS recommended rate, 15 yearlings per 80 ha), moderate (NRCS recommended rate, 4 yearlings per 12ha), and heavy (33% above NRCS recommended rate, 4 yearlings per 9 ha). British- and continental-breed yearling cattle were used throughout the study years. When forage supply was limited due to drought, grazing seasons were shortened or cattle were not grazed for that season. Individual raw data on cattle entry and exit weights are available from 1982 to 2022. No grazing occurred in the years 1989, 2000, and 2002 due to drought conditions. Weight gain outliers (± 2 sd of treatment mean) were removed from the dataset.

美国农业部农业研究服务局高平原草原研究站（HPGRS）位于美国怀俄明州夏延市。1982年，针对北方混合草草原的长期载畜率（stocking rate）研究启动，采用全季（6月初至10月）放牧方式。载畜率分为轻度（比NRCS推荐率低35%，每80公顷15头周岁牛）、中度（NRCS推荐率，每12公顷4头周岁牛）和重度（比NRCS推荐率高33%，每9公顷4头周岁牛）。整个研究期间均使用英国和欧洲大陆品种的周岁牛。当干旱导致饲草供应不足时，放牧季会缩短或该季停止放牧。1982年至2022年的牛只进出栏体重原始数据可供获取。1989年、2000年和2002年因干旱未进行放牧。体重增长异常值（处理组均值±2 sd）已从数据集中剔除。