NURSERY RESPONSE OF ACACIA KOA SEEDLINGS TO CONTAINER SIZE, IRRIGATION METHOD, AND FERTILIZATION RATE
NURSERY RESPONSE OF ACACIA KOA SEEDLINGS TO CONTAINER SIZE, IRRIGATION METHOD, AND FERTILIZATION RATE
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相思树苗对容器大小、灌溉方法和施肥量的育苗反应
DOI：
10.1080/01904167.2011.544356
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发表时间：
2011
影响因子：
2.1
通讯作者：
D. Jacobs
中科院分区：
文献类型：
--
作者：
R. K. Dumroese;A. S. Davis;D. Jacobs
种植柯亚相思（Acacia koa A.）Gray）在美国夏威夷帮助恢复对保护特有物种至关重要的受干扰地点。在营养竞争下种植的幼苗的存活和生长通常随着初始植物大小而增加。增加容器尺寸和施肥量可能会产生更大的幼苗，但高施肥会导致地表和地下水污染，肥料利用率相对较低。地下灌溉系统可能有助于缓解这一问题。我们的研究目的是评估在容器体积（50至656 mL）和施肥量（0至9.6 kg·m−3）范围内，采用高架或地下灌溉的Koa幼苗生长。增加容器体积从50到656毫升产生的树高和茎粗生长的200%以上的Koa幼苗。地下灌溉导致较少的养分淋失，并产生类似的活力，架空灌溉幼苗幼苗。地下灌溉有助于优化肥料输送，这可以提高肥料使用效率并减少环境污染。
Planting koa (Acacia koa A. Gray) in Hawai‘i, USA aids in restoration of disturbed sites essential to conservation of endemic species. Survival and growth of planted seedlings under vegetative competition typically increases with initial plant size. Increasing container size and fertilizer rate may produce larger seedlings, but high fertilization can lead to surface and groundwater pollution and relatively low fertilizer use efficiency. Subirrigation systems may help mitigate this problem. Our study objective was to evaluate koa seedling growth with overhead or subirrigation over a range of container volumes (50 to 656 mL) and fertilizer rates (0 to 9.6 kg·m−3). Increasing container volume from 50 to 656 mL yielded koa seedlings with 200% more height and stem diameter growth. Subirrigation resulted in less nutrient leaching losses and yielded seedlings of similar vigor as overhead irrigated seedlings. Subirrigation helps optimize fertilizer delivery, which may improve fertilizer use efficiency and reduce environmental contamination.