Factors Influencing Broadcast Seeding in Bunchgrass Range

作者：J. Ron Nelson, A. M. Wilson, Carl J. Goebel · 发表于：Journal of Range Management · 年份：1970 · DOI：10.2307/3896379 · 被引用次数：68 · 研究领域：Turfgrass Adaptation and Management、Agriculture, Soil, Plant Science、Ecology and Conservation Studies

The objective of this work was to evaluate problems of broadcast seeding perennial grasses on steep or rocky rangelands that cannot be seeded by conventional methods. Depredation of seeds by rodents and birds limited the effectiveness of broadcast seedings but not of drilled seedings. Drilled seeds remained in relatively constant and favorable soil moisture, and carried on metabolic processes rapidly and without interruption. Broadcast seeds were exposed to rapidly fluctuating moisture conditions which resulted in the frequent starting and stopping of germination processes. In drilled seedings, seven perennial grasses gave good seedling stands. In broadcast seedings, Sherman big bluegrass (Poa ampla) gave the best seedling stands. Ineffectiveness in controlling cheatgrass (Bromus tectorum) and other competing species was the main obstacle to seedling establishment. Successful establishment of seeded grasses appeared to be related to rate of penetration of seedling roots.