Substrate wettability is an important factor in determining effective and efficient irrigation techniques for container-grown crops. Reduced substrate wettability can lead to lower substrate water capture, excessive leaching and poor plant growth. This research examined substrate water capture using surface and subirrigation under three initial moisture contents (IMC). Sphagnum peat moss, coconut coir, and pine bark were tested at IMCs of 67% 50%, and 33%. Substrate water capture was influenced by both IMC and irrigation technique. Surface irrigation increased the water capture of coir and peat, regardless of IMC, whereas IMC influenced pine bark water capture more than irrigation method. Surface-irrigated coir at or above 50% IMC provided the greatest water capture across all treatments. The first irrigation had the highest capture rate compared to all other events combined. Container capacities of pine bark and coir were unaffected by IMC and irrigation type, but the CC of peat was less by ~ 40% volumetrically under low IMC conditions. Coir, had the greatest ability to capture water, followed by pine bark and peat, respectively. Moisture content, irrigation type and component selection all influence the water capture efficiency of a container substrate.

中文翻译：

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三种常见温室无土基质成分的两种灌溉技术的集水效率比较

基质的可湿性是决定容器种植农作物有效灌溉技术的重要因素。降低的底物润湿性可能导致更低的底物水捕获，过多的浸出和不良的植物生长。这项研究检查了在三个初始水分含量（IMC）下使用地面灌溉和地下灌溉的基质水捕获。球茎泥炭藓，椰子椰皮和松树皮的IMC分别为67％，50％和33％。基质水捕获受IMC和灌溉技术的影响。地面灌溉增加了椰壳和泥炭的水分捕获，而与IMC无关，而IMC对松树皮水分捕获的影响大于灌溉方法。IMC等于或高于50％的表面灌溉椰皮在所有处理中都能最大程度地捕获水。相比所有其他事件，第一次灌溉的捕获率最高。松树皮和椰壳的容器容量不受IMC和灌溉类型的影响，但在低IMC条件下，泥炭的CC体积约减少40％。椰壳具有最大的吸水能力，其次是松树皮和泥炭。水分含量，灌溉类型和成分选择都会影响容器基质的集水效率。