In the first few weeks of bedding plant production, growers rarely irrigate so as to bring the substrate up to container capacity (the point at which the substrate can hold no more water against gravity). Research has been carried out to determine effects of substrate water content on bedding plant growth. Van Iersel et al. determined effects of substrate water content on petunia (Petunia v-hybridd) (2010). The substrate was maintained at or above substrate volumetric water contents (VWC; cm3 water cnr3 substrate) of 5, 10, 15, 20, 25, 30, 35, and 40%. Shoot dry weight increased quadratically with VWC. There was a little increase in shoot dry weight between 25 and 40% VWC. All plants were well-watered uniformly for the first 9 days after being transplanted into the containers, and it took 9 days after irrigation treatment initiation for the substrate to reach the 5% VWC target. The substrate water content maintained during the first 9 days is not reported. Furthermore, substrate water content at container capacity was not reported. Therefore, it is not known how 40% VWC (the wettest treatment) compares to container capacity in the substrate and container used in the study.
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机译：在床上用品生产的前几个星期，种植者很少灌溉，使基板达到容量（基材可以保持不再抗重力的点）。已经进行了研究以确定底物含水量对床上用品植物生长的影响。 van iersel等人。确定底物水含量对矮牵牛（Petonia V-Hybridd）（2010）的影响。将基板保持在或高于底物体积水含量（VWC; CM3水CNR3基底），为5,10,15,20,25,30,35和40％。射击干重与VWC相当增加。 25至40％之间的芽干重量略有增加。在移植到容器中后，所有植物均匀均匀浇水，灌溉处理后的灌溉处理后9天达到5％VWC靶。未报道在前9天期间保持的衬底水含量。此外，未报道容量容量的衬底水含量。因此，尚不清楚40％VWC（最潮湿的处理）与研究中使用的基材和容器中的容器容量进行比较。
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