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首页> 外文期刊>Acta Horticulturae >Nutrient loading from initial watering of container plants
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Nutrient loading from initial watering of container plants

机译：来自集装箱植物的初始喷水的营养载荷

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Nursery plants are often placed in the container substrate and immediately watered intensively. The watering or irrigation is sometimes accomplished with a "shower-like" structure that has multiple high-volume nozzles positioned to distribute water over a wagon load of container plants as the wagon passes underneath. The objective of this research was to document nitrogen (N) and phosphorus (P) loading from initial watering of containers using this type of watering station. To accomplish this objective, a concrete pad with collection channel was constructed. Each month for six months, 84 containers (8-L) were filled with a 60% pine bark 40% organic compost (v/v) amended with 11 kg nr3 of a 17N-2.2P-8K controlled-release fertilizer, planted with oneof several woody plant species, and loaded onto a wagon that passed under the watering station. Irrigation water applied was metered and runoff volume collected in the channel was measured by weighing. Nitrate N (N03-N), total Kjeldahl N (TKN), and totalP (TP) concentrations in irrigation water and runoff were determined and respective loads from container leaching were calculated considering contributions from irrigation water. An average of 160 L was applied per watering resulting in an average of 93L of runoff that contained 3.7 and 5.3 g of N03-N and TKN, respectively, and 372 mg of TP. That equates to potential nutrient loads of 1.3-1.7 kg ha 1 of N03-N, 1.9-2.5 kg ha 1 of TKN, and 131-175 g ha 1 of TP if container plant densities ranged from 29,640-39,520 on 1 ha of production area. Efficient application of irrigation to minimize leaching and runoff should be an important practice in container plant production.
机译：苗圃植物通常被放置在容器基板中并立即集中浇水。浇水或灌溉有时通过“淋浴”结构来完成，该结构具有多个高容量喷嘴，该高容量喷嘴定位在随着马车在下面的货车通过的货车厂的货车负荷上分配水。本研究的目的是使用这种类型的浇水站从容器的初始浇水中记录氮气（N）和磷（P）加载。为了实现这一目标，建造了一个带收集通道的混凝土垫。每月六个月，84个容器（8-L）填充了60％松树40％有机堆肥（v / v），用11kg NR3的17N-2.2p-8k控释肥料，种植几种木本植物种类，装载到在喷壶下方的无盖货车上。施加灌溉水的计量和在通道中收集的径流体积通过称重来测量。确定灌溉水和径流中的硝酸N（N03-N），总KjeLDAHL N（TKN）和全脂（TP）浓度，并计算来自集装箱浸出的各自负荷，考虑到灌溉水的贡献。每次浇水施加平均为160L，其平均为93L径流，分别含有3.7和5.3g N03-N和TKN，和372mg TP。等于潜在的营养载荷为1.3-1.7 kg ha 1的N03-N，1.9-2.5 kg HA 1，如果集装箱植物密度为1公顷的29,640-39,520，则TP的131-175g HA 1。区域。灌溉的高效应用使浸出和径流最大限度地应成为集装箱厂生产中的重要实践。

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